refactor(server): modularize getFfmpegOptions (#3138)

* refactored `getFfmpegOptions`

refactor transcoding, make separate service

* fixed enum casing

* use `Logger` instead of `console.log`

* review suggestions

* use enum for `getHandler`

* fixed formatting

* Update server/src/domain/media/media.util.ts

Co-authored-by: Jason Rasmussen <jrasm91@gmail.com>

* Update server/src/domain/media/media.util.ts

Co-authored-by: Jason Rasmussen <jrasm91@gmail.com>

* More specific imports, renamed codec classes

* simplified code

* removed unused import

* added tests

* added base implementation for bitrate and threads

---------

Co-authored-by: Jason Rasmussen <jrasm91@gmail.com>

cli/src/api/open-api/api.ts

@@ -746,6 +746,21 @@ export const AssetTypeEnum = {
 export type AssetTypeEnum = typeof AssetTypeEnum[keyof typeof AssetTypeEnum];
 
 
+/**
+ * 
+ * @export
+ * @enum {string}
+ */
+
+export const AudioCodec = {
+    Mp3: 'mp3',
+    Aac: 'aac',
+    Opus: 'opus'
+} as const;
+
+export type AudioCodec = typeof AudioCodec[keyof typeof AudioCodec];
+
+
 /**
  * 
  * @export
@@ -2411,24 +2426,30 @@ export interface SystemConfigFFmpegDto {
      * @memberof SystemConfigFFmpegDto
      */
     'threads': number;
+    /**
+     * 
+     * @type {VideoCodec}
+     * @memberof SystemConfigFFmpegDto
+     */
+    'targetVideoCodec': VideoCodec;
+    /**
+     * 
+     * @type {AudioCodec}
+     * @memberof SystemConfigFFmpegDto
+     */
+    'targetAudioCodec': AudioCodec;
+    /**
+     * 
+     * @type {TranscodePolicy}
+     * @memberof SystemConfigFFmpegDto
+     */
+    'transcode': TranscodePolicy;
     /**
      * 
      * @type {string}
      * @memberof SystemConfigFFmpegDto
      */
     'preset': string;
-    /**
-     * 
-     * @type {string}
-     * @memberof SystemConfigFFmpegDto
-     */
-    'targetVideoCodec': string;
-    /**
-     * 
-     * @type {string}
-     * @memberof SystemConfigFFmpegDto
-     */
-    'targetAudioCodec': string;
     /**
      * 
      * @type {string}
@@ -2447,22 +2468,8 @@ export interface SystemConfigFFmpegDto {
      * @memberof SystemConfigFFmpegDto
      */
     'twoPass': boolean;
-    /**
-     * 
-     * @type {string}
-     * @memberof SystemConfigFFmpegDto
-     */
-    'transcode': SystemConfigFFmpegDtoTranscodeEnum;
 }
 
-export const SystemConfigFFmpegDtoTranscodeEnum = {
-    All: 'all',
-    Optimal: 'optimal',
-    Required: 'required',
-    Disabled: 'disabled'
-} as const;
-
-export type SystemConfigFFmpegDtoTranscodeEnum = typeof SystemConfigFFmpegDtoTranscodeEnum[keyof typeof SystemConfigFFmpegDtoTranscodeEnum];
 
 /**
  * 
@@ -2749,6 +2756,22 @@ export const TimeGroupEnum = {
 export type TimeGroupEnum = typeof TimeGroupEnum[keyof typeof TimeGroupEnum];
 
 
+/**
+ * 
+ * @export
+ * @enum {string}
+ */
+
+export const TranscodePolicy = {
+    All: 'all',
+    Optimal: 'optimal',
+    Required: 'required',
+    Disabled: 'disabled'
+} as const;
+
+export type TranscodePolicy = typeof TranscodePolicy[keyof typeof TranscodePolicy];
+
+
 /**
  * 
  * @export
@@ -3027,6 +3050,21 @@ export interface ValidateAccessTokenResponseDto {
      */
     'authStatus': boolean;
 }
+/**
+ * 
+ * @export
+ * @enum {string}
+ */
+
+export const VideoCodec = {
+    H264: 'h264',
+    Hevc: 'hevc',
+    Vp9: 'vp9'
+} as const;
+
+export type VideoCodec = typeof VideoCodec[keyof typeof VideoCodec];
+
+
 
 /**
  * APIKeyApi - axios parameter creator

mobile/openapi/.openapi-generator/FILES

@@ -29,6 +29,7 @@ doc/AssetIdsDto.md
 doc/AssetIdsResponseDto.md
 doc/AssetResponseDto.md
 doc/AssetTypeEnum.md
+doc/AudioCodec.md
 doc/AuthDeviceResponseDto.md
 doc/AuthenticationApi.md
 doc/ChangePasswordDto.md
@@ -108,6 +109,7 @@ doc/TagResponseDto.md
 doc/TagTypeEnum.md
 doc/ThumbnailFormat.md
 doc/TimeGroupEnum.md
+doc/TranscodePolicy.md
 doc/UpdateAlbumDto.md
 doc/UpdateAssetDto.md
 doc/UpdateTagDto.md
@@ -117,6 +119,7 @@ doc/UserApi.md
 doc/UserCountResponseDto.md
 doc/UserResponseDto.md
 doc/ValidateAccessTokenResponseDto.md
+doc/VideoCodec.md
 git_push.sh
 lib/api.dart
 lib/api/album_api.dart
@@ -164,6 +167,7 @@ lib/model/asset_ids_dto.dart
 lib/model/asset_ids_response_dto.dart
 lib/model/asset_response_dto.dart
 lib/model/asset_type_enum.dart
+lib/model/audio_codec.dart
 lib/model/auth_device_response_dto.dart
 lib/model/change_password_dto.dart
 lib/model/check_duplicate_asset_dto.dart
@@ -233,6 +237,7 @@ lib/model/tag_response_dto.dart
 lib/model/tag_type_enum.dart
 lib/model/thumbnail_format.dart
 lib/model/time_group_enum.dart
+lib/model/transcode_policy.dart
 lib/model/update_album_dto.dart
 lib/model/update_asset_dto.dart
 lib/model/update_tag_dto.dart
@@ -241,6 +246,7 @@ lib/model/usage_by_user_dto.dart
 lib/model/user_count_response_dto.dart
 lib/model/user_response_dto.dart
 lib/model/validate_access_token_response_dto.dart
+lib/model/video_codec.dart
 pubspec.yaml
 test/add_assets_dto_test.dart
 test/add_assets_response_dto_test.dart
@@ -268,6 +274,7 @@ test/asset_ids_dto_test.dart
 test/asset_ids_response_dto_test.dart
 test/asset_response_dto_test.dart
 test/asset_type_enum_test.dart
+test/audio_codec_test.dart
 test/auth_device_response_dto_test.dart
 test/authentication_api_test.dart
 test/change_password_dto_test.dart
@@ -347,6 +354,7 @@ test/tag_response_dto_test.dart
 test/tag_type_enum_test.dart
 test/thumbnail_format_test.dart
 test/time_group_enum_test.dart
+test/transcode_policy_test.dart
 test/update_album_dto_test.dart
 test/update_asset_dto_test.dart
 test/update_tag_dto_test.dart
@@ -356,3 +364,4 @@ test/user_api_test.dart
 test/user_count_response_dto_test.dart
 test/user_response_dto_test.dart
 test/validate_access_token_response_dto_test.dart
+test/video_codec_test.dart

mobile/openapi/README.md

@@ -199,6 +199,7 @@ Class | Method | HTTP request | Description
  - [AssetIdsResponseDto](doc//AssetIdsResponseDto.md)
  - [AssetResponseDto](doc//AssetResponseDto.md)
  - [AssetTypeEnum](doc//AssetTypeEnum.md)
+ - [AudioCodec](doc//AudioCodec.md)
  - [AuthDeviceResponseDto](doc//AuthDeviceResponseDto.md)
  - [ChangePasswordDto](doc//ChangePasswordDto.md)
  - [CheckDuplicateAssetDto](doc//CheckDuplicateAssetDto.md)
@@ -268,6 +269,7 @@ Class | Method | HTTP request | Description
  - [TagTypeEnum](doc//TagTypeEnum.md)
  - [ThumbnailFormat](doc//ThumbnailFormat.md)
  - [TimeGroupEnum](doc//TimeGroupEnum.md)
+ - [TranscodePolicy](doc//TranscodePolicy.md)
  - [UpdateAlbumDto](doc//UpdateAlbumDto.md)
  - [UpdateAssetDto](doc//UpdateAssetDto.md)
  - [UpdateTagDto](doc//UpdateTagDto.md)
@@ -276,6 +278,7 @@ Class | Method | HTTP request | Description
  - [UserCountResponseDto](doc//UserCountResponseDto.md)
  - [UserResponseDto](doc//UserResponseDto.md)
  - [ValidateAccessTokenResponseDto](doc//ValidateAccessTokenResponseDto.md)
+ - [VideoCodec](doc//VideoCodec.md)
 
 
 ## Documentation For Authorization

mobile/openapi/doc/AudioCodec.md

@@ -0,0 +1,14 @@
+# openapi.model.AudioCodec
+
+## Load the model package
+```dart
+import 'package:openapi/api.dart';
+```
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+

mobile/openapi/doc/SystemConfigFFmpegDto.md

@@ -10,13 +10,13 @@ Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **crf** | **int** |  | 
 **threads** | **int** |  | 
+**targetVideoCodec** | [**VideoCodec**](VideoCodec.md) |  | 
+**targetAudioCodec** | [**AudioCodec**](AudioCodec.md) |  | 
+**transcode** | [**TranscodePolicy**](TranscodePolicy.md) |  | 
 **preset** | **String** |  | 
-**targetVideoCodec** | **String** |  | 
-**targetAudioCodec** | **String** |  | 
 **targetResolution** | **String** |  | 
 **maxBitrate** | **String** |  | 
 **twoPass** | **bool** |  | 
-**transcode** | **String** |  | 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 

mobile/openapi/doc/TranscodePolicy.md

@@ -0,0 +1,14 @@
+# openapi.model.TranscodePolicy
+
+## Load the model package
+```dart
+import 'package:openapi/api.dart';
+```
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+

mobile/openapi/doc/VideoCodec.md

@@ -0,0 +1,14 @@
+# openapi.model.VideoCodec
+
+## Load the model package
+```dart
+import 'package:openapi/api.dart';
+```
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+

mobile/openapi/lib/api.dart

@@ -66,6 +66,7 @@ part 'model/asset_ids_dto.dart';
 part 'model/asset_ids_response_dto.dart';
 part 'model/asset_response_dto.dart';
 part 'model/asset_type_enum.dart';
+part 'model/audio_codec.dart';
 part 'model/auth_device_response_dto.dart';
 part 'model/change_password_dto.dart';
 part 'model/check_duplicate_asset_dto.dart';
@@ -135,6 +136,7 @@ part 'model/tag_response_dto.dart';
 part 'model/tag_type_enum.dart';
 part 'model/thumbnail_format.dart';
 part 'model/time_group_enum.dart';
+part 'model/transcode_policy.dart';
 part 'model/update_album_dto.dart';
 part 'model/update_asset_dto.dart';
 part 'model/update_tag_dto.dart';
@@ -143,6 +145,7 @@ part 'model/usage_by_user_dto.dart';
 part 'model/user_count_response_dto.dart';
 part 'model/user_response_dto.dart';
 part 'model/validate_access_token_response_dto.dart';
+part 'model/video_codec.dart';
 
 
 const _delimiters = {'csv': ',', 'ssv': ' ', 'tsv': '\t', 'pipes': '|'};

mobile/openapi/lib/api_client.dart

@@ -227,6 +227,8 @@ class ApiClient {
           return AssetResponseDto.fromJson(value);
         case 'AssetTypeEnum':
           return AssetTypeEnumTypeTransformer().decode(value);
+        case 'AudioCodec':
+          return AudioCodecTypeTransformer().decode(value);
         case 'AuthDeviceResponseDto':
           return AuthDeviceResponseDto.fromJson(value);
         case 'ChangePasswordDto':
@@ -365,6 +367,8 @@ class ApiClient {
           return ThumbnailFormatTypeTransformer().decode(value);
         case 'TimeGroupEnum':
           return TimeGroupEnumTypeTransformer().decode(value);
+        case 'TranscodePolicy':
+          return TranscodePolicyTypeTransformer().decode(value);
         case 'UpdateAlbumDto':
           return UpdateAlbumDto.fromJson(value);
         case 'UpdateAssetDto':
@@ -381,6 +385,8 @@ class ApiClient {
           return UserResponseDto.fromJson(value);
         case 'ValidateAccessTokenResponseDto':
           return ValidateAccessTokenResponseDto.fromJson(value);
+        case 'VideoCodec':
+          return VideoCodecTypeTransformer().decode(value);
         default:
           dynamic match;
           if (value is List && (match = _regList.firstMatch(targetType)?.group(1)) != null) {

mobile/openapi/lib/api_helper.dart

@@ -58,6 +58,9 @@ String parameterToString(dynamic value) {
   if (value is AssetTypeEnum) {
     return AssetTypeEnumTypeTransformer().encode(value).toString();
   }
+  if (value is AudioCodec) {
+    return AudioCodecTypeTransformer().encode(value).toString();
+  }
   if (value is DeleteAssetStatus) {
     return DeleteAssetStatusTypeTransformer().encode(value).toString();
   }
@@ -79,6 +82,12 @@ String parameterToString(dynamic value) {
   if (value is TimeGroupEnum) {
     return TimeGroupEnumTypeTransformer().encode(value).toString();
   }
+  if (value is TranscodePolicy) {
+    return TranscodePolicyTypeTransformer().encode(value).toString();
+  }
+  if (value is VideoCodec) {
+    return VideoCodecTypeTransformer().encode(value).toString();
+  }
   return value.toString();
 }
 

mobile/openapi/lib/model/audio_codec.dart

@@ -0,0 +1,88 @@
+//
+// AUTO-GENERATED FILE, DO NOT MODIFY!
+//
+// @dart=2.12
+
+// ignore_for_file: unused_element, unused_import
+// ignore_for_file: always_put_required_named_parameters_first
+// ignore_for_file: constant_identifier_names
+// ignore_for_file: lines_longer_than_80_chars
+
+part of openapi.api;
+
+
+class AudioCodec {
+  /// Instantiate a new enum with the provided [value].
+  const AudioCodec._(this.value);
+
+  /// The underlying value of this enum member.
+  final String value;
+
+  @override
+  String toString() => value;
+
+  String toJson() => value;
+
+  static const mp3 = AudioCodec._(r'mp3');
+  static const aac = AudioCodec._(r'aac');
+  static const opus = AudioCodec._(r'opus');
+
+  /// List of all possible values in this [enum][AudioCodec].
+  static const values = <AudioCodec>[
+    mp3,
+    aac,
+    opus,
+  ];
+
+  static AudioCodec? fromJson(dynamic value) => AudioCodecTypeTransformer().decode(value);
+
+  static List<AudioCodec>? listFromJson(dynamic json, {bool growable = false,}) {
+    final result = <AudioCodec>[];
+    if (json is List && json.isNotEmpty) {
+      for (final row in json) {
+        final value = AudioCodec.fromJson(row);
+        if (value != null) {
+          result.add(value);
+        }
+      }
+    }
+    return result.toList(growable: growable);
+  }
+}
+
+/// Transformation class that can [encode] an instance of [AudioCodec] to String,
+/// and [decode] dynamic data back to [AudioCodec].
+class AudioCodecTypeTransformer {
+  factory AudioCodecTypeTransformer() => _instance ??= const AudioCodecTypeTransformer._();
+
+  const AudioCodecTypeTransformer._();
+
+  String encode(AudioCodec data) => data.value;
+
+  /// Decodes a [dynamic value][data] to a AudioCodec.
+  ///
+  /// If [allowNull] is true and the [dynamic value][data] cannot be decoded successfully,
+  /// then null is returned. However, if [allowNull] is false and the [dynamic value][data]
+  /// cannot be decoded successfully, then an [UnimplementedError] is thrown.
+  ///
+  /// The [allowNull] is very handy when an API changes and a new enum value is added or removed,
+  /// and users are still using an old app with the old code.
+  AudioCodec? decode(dynamic data, {bool allowNull = true}) {
+    if (data != null) {
+      switch (data) {
+        case r'mp3': return AudioCodec.mp3;
+        case r'aac': return AudioCodec.aac;
+        case r'opus': return AudioCodec.opus;
+        default:
+          if (!allowNull) {
+            throw ArgumentError('Unknown enum value to decode: $data');
+          }
+      }
+    }
+    return null;
+  }
+
+  /// Singleton [AudioCodecTypeTransformer] instance.
+  static AudioCodecTypeTransformer? _instance;
+}
+

mobile/openapi/lib/model/system_config_f_fmpeg_dto.dart

@@ -15,72 +15,72 @@ class SystemConfigFFmpegDto {
   SystemConfigFFmpegDto({
     required this.crf,
     required this.threads,
-    required this.preset,
     required this.targetVideoCodec,
     required this.targetAudioCodec,
+    required this.transcode,
+    required this.preset,
     required this.targetResolution,
     required this.maxBitrate,
     required this.twoPass,
-    required this.transcode,
   });
 
   int crf;
 
   int threads;
 
+  VideoCodec targetVideoCodec;
+
+  AudioCodec targetAudioCodec;
+
+  TranscodePolicy transcode;
+
   String preset;
 
-  String targetVideoCodec;
-
-  String targetAudioCodec;
-
   String targetResolution;
 
   String maxBitrate;
 
   bool twoPass;
 
-  SystemConfigFFmpegDtoTranscodeEnum transcode;
-
   @override
   bool operator ==(Object other) => identical(this, other) || other is SystemConfigFFmpegDto &&
      other.crf == crf &&
      other.threads == threads &&
-     other.preset == preset &&
      other.targetVideoCodec == targetVideoCodec &&
      other.targetAudioCodec == targetAudioCodec &&
+     other.transcode == transcode &&
+     other.preset == preset &&
      other.targetResolution == targetResolution &&
      other.maxBitrate == maxBitrate &&
-     other.twoPass == twoPass &&
+     other.twoPass == twoPass;
-     other.transcode == transcode;
 
   @override
   int get hashCode =>
     // ignore: unnecessary_parenthesis
     (crf.hashCode) +
     (threads.hashCode) +
-    (preset.hashCode) +
     (targetVideoCodec.hashCode) +
     (targetAudioCodec.hashCode) +
+    (transcode.hashCode) +
+    (preset.hashCode) +
     (targetResolution.hashCode) +
     (maxBitrate.hashCode) +
-    (twoPass.hashCode) +
+    (twoPass.hashCode);
-    (transcode.hashCode);
 
   @override
-  String toString() => 'SystemConfigFFmpegDto[crf=$crf, threads=$threads, preset=$preset, targetVideoCodec=$targetVideoCodec, targetAudioCodec=$targetAudioCodec, targetResolution=$targetResolution, maxBitrate=$maxBitrate, twoPass=$twoPass, transcode=$transcode]';
+  String toString() => 'SystemConfigFFmpegDto[crf=$crf, threads=$threads, targetVideoCodec=$targetVideoCodec, targetAudioCodec=$targetAudioCodec, transcode=$transcode, preset=$preset, targetResolution=$targetResolution, maxBitrate=$maxBitrate, twoPass=$twoPass]';
 
   Map<String, dynamic> toJson() {
     final json = <String, dynamic>{};
       json[r'crf'] = this.crf;
       json[r'threads'] = this.threads;
-      json[r'preset'] = this.preset;
       json[r'targetVideoCodec'] = this.targetVideoCodec;
       json[r'targetAudioCodec'] = this.targetAudioCodec;
+      json[r'transcode'] = this.transcode;
+      json[r'preset'] = this.preset;
       json[r'targetResolution'] = this.targetResolution;
       json[r'maxBitrate'] = this.maxBitrate;
       json[r'twoPass'] = this.twoPass;
-      json[r'transcode'] = this.transcode;
     return json;
   }
 
@@ -94,13 +94,13 @@ class SystemConfigFFmpegDto {
       return SystemConfigFFmpegDto(
         crf: mapValueOfType<int>(json, r'crf')!,
         threads: mapValueOfType<int>(json, r'threads')!,
+        targetVideoCodec: VideoCodec.fromJson(json[r'targetVideoCodec'])!,
+        targetAudioCodec: AudioCodec.fromJson(json[r'targetAudioCodec'])!,
+        transcode: TranscodePolicy.fromJson(json[r'transcode'])!,
         preset: mapValueOfType<String>(json, r'preset')!,
-        targetVideoCodec: mapValueOfType<String>(json, r'targetVideoCodec')!,
-        targetAudioCodec: mapValueOfType<String>(json, r'targetAudioCodec')!,
         targetResolution: mapValueOfType<String>(json, r'targetResolution')!,
         maxBitrate: mapValueOfType<String>(json, r'maxBitrate')!,
         twoPass: mapValueOfType<bool>(json, r'twoPass')!,
-        transcode: SystemConfigFFmpegDtoTranscodeEnum.fromJson(json[r'transcode'])!,
       );
     }
     return null;
@@ -150,93 +150,13 @@ class SystemConfigFFmpegDto {
   static const requiredKeys = <String>{
     'crf',
     'threads',
-    'preset',
     'targetVideoCodec',
     'targetAudioCodec',
+    'transcode',
+    'preset',
     'targetResolution',
     'maxBitrate',
     'twoPass',
-    'transcode',
   };
 }
 
-
-class SystemConfigFFmpegDtoTranscodeEnum {
-  /// Instantiate a new enum with the provided [value].
-  const SystemConfigFFmpegDtoTranscodeEnum._(this.value);
-
-  /// The underlying value of this enum member.
-  final String value;
-
-  @override
-  String toString() => value;
-
-  String toJson() => value;
-
-  static const all = SystemConfigFFmpegDtoTranscodeEnum._(r'all');
-  static const optimal = SystemConfigFFmpegDtoTranscodeEnum._(r'optimal');
-  static const required_ = SystemConfigFFmpegDtoTranscodeEnum._(r'required');
-  static const disabled = SystemConfigFFmpegDtoTranscodeEnum._(r'disabled');
-
-  /// List of all possible values in this [enum][SystemConfigFFmpegDtoTranscodeEnum].
-  static const values = <SystemConfigFFmpegDtoTranscodeEnum>[
-    all,
-    optimal,
-    required_,
-    disabled,
-  ];
-
-  static SystemConfigFFmpegDtoTranscodeEnum? fromJson(dynamic value) => SystemConfigFFmpegDtoTranscodeEnumTypeTransformer().decode(value);
-
-  static List<SystemConfigFFmpegDtoTranscodeEnum>? listFromJson(dynamic json, {bool growable = false,}) {
-    final result = <SystemConfigFFmpegDtoTranscodeEnum>[];
-    if (json is List && json.isNotEmpty) {
-      for (final row in json) {
-        final value = SystemConfigFFmpegDtoTranscodeEnum.fromJson(row);
-        if (value != null) {
-          result.add(value);
-        }
-      }
-    }
-    return result.toList(growable: growable);
-  }
-}
-
-/// Transformation class that can [encode] an instance of [SystemConfigFFmpegDtoTranscodeEnum] to String,
-/// and [decode] dynamic data back to [SystemConfigFFmpegDtoTranscodeEnum].
-class SystemConfigFFmpegDtoTranscodeEnumTypeTransformer {
-  factory SystemConfigFFmpegDtoTranscodeEnumTypeTransformer() => _instance ??= const SystemConfigFFmpegDtoTranscodeEnumTypeTransformer._();
-
-  const SystemConfigFFmpegDtoTranscodeEnumTypeTransformer._();
-
-  String encode(SystemConfigFFmpegDtoTranscodeEnum data) => data.value;
-
-  /// Decodes a [dynamic value][data] to a SystemConfigFFmpegDtoTranscodeEnum.
-  ///
-  /// If [allowNull] is true and the [dynamic value][data] cannot be decoded successfully,
-  /// then null is returned. However, if [allowNull] is false and the [dynamic value][data]
-  /// cannot be decoded successfully, then an [UnimplementedError] is thrown.
-  ///
-  /// The [allowNull] is very handy when an API changes and a new enum value is added or removed,
-  /// and users are still using an old app with the old code.
-  SystemConfigFFmpegDtoTranscodeEnum? decode(dynamic data, {bool allowNull = true}) {
-    if (data != null) {
-      switch (data) {
-        case r'all': return SystemConfigFFmpegDtoTranscodeEnum.all;
-        case r'optimal': return SystemConfigFFmpegDtoTranscodeEnum.optimal;
-        case r'required': return SystemConfigFFmpegDtoTranscodeEnum.required_;
-        case r'disabled': return SystemConfigFFmpegDtoTranscodeEnum.disabled;
-        default:
-          if (!allowNull) {
-            throw ArgumentError('Unknown enum value to decode: $data');
-          }
-      }
-    }
-    return null;
-  }
-
-  /// Singleton [SystemConfigFFmpegDtoTranscodeEnumTypeTransformer] instance.
-  static SystemConfigFFmpegDtoTranscodeEnumTypeTransformer? _instance;
-}
-
-

mobile/openapi/lib/model/transcode_policy.dart

@@ -0,0 +1,91 @@
+//
+// AUTO-GENERATED FILE, DO NOT MODIFY!
+//
+// @dart=2.12
+
+// ignore_for_file: unused_element, unused_import
+// ignore_for_file: always_put_required_named_parameters_first
+// ignore_for_file: constant_identifier_names
+// ignore_for_file: lines_longer_than_80_chars
+
+part of openapi.api;
+
+
+class TranscodePolicy {
+  /// Instantiate a new enum with the provided [value].
+  const TranscodePolicy._(this.value);
+
+  /// The underlying value of this enum member.
+  final String value;
+
+  @override
+  String toString() => value;
+
+  String toJson() => value;
+
+  static const all = TranscodePolicy._(r'all');
+  static const optimal = TranscodePolicy._(r'optimal');
+  static const required_ = TranscodePolicy._(r'required');
+  static const disabled = TranscodePolicy._(r'disabled');
+
+  /// List of all possible values in this [enum][TranscodePolicy].
+  static const values = <TranscodePolicy>[
+    all,
+    optimal,
+    required_,
+    disabled,
+  ];
+
+  static TranscodePolicy? fromJson(dynamic value) => TranscodePolicyTypeTransformer().decode(value);
+
+  static List<TranscodePolicy>? listFromJson(dynamic json, {bool growable = false,}) {
+    final result = <TranscodePolicy>[];
+    if (json is List && json.isNotEmpty) {
+      for (final row in json) {
+        final value = TranscodePolicy.fromJson(row);
+        if (value != null) {
+          result.add(value);
+        }
+      }
+    }
+    return result.toList(growable: growable);
+  }
+}
+
+/// Transformation class that can [encode] an instance of [TranscodePolicy] to String,
+/// and [decode] dynamic data back to [TranscodePolicy].
+class TranscodePolicyTypeTransformer {
+  factory TranscodePolicyTypeTransformer() => _instance ??= const TranscodePolicyTypeTransformer._();
+
+  const TranscodePolicyTypeTransformer._();
+
+  String encode(TranscodePolicy data) => data.value;
+
+  /// Decodes a [dynamic value][data] to a TranscodePolicy.
+  ///
+  /// If [allowNull] is true and the [dynamic value][data] cannot be decoded successfully,
+  /// then null is returned. However, if [allowNull] is false and the [dynamic value][data]
+  /// cannot be decoded successfully, then an [UnimplementedError] is thrown.
+  ///
+  /// The [allowNull] is very handy when an API changes and a new enum value is added or removed,
+  /// and users are still using an old app with the old code.
+  TranscodePolicy? decode(dynamic data, {bool allowNull = true}) {
+    if (data != null) {
+      switch (data) {
+        case r'all': return TranscodePolicy.all;
+        case r'optimal': return TranscodePolicy.optimal;
+        case r'required': return TranscodePolicy.required_;
+        case r'disabled': return TranscodePolicy.disabled;
+        default:
+          if (!allowNull) {
+            throw ArgumentError('Unknown enum value to decode: $data');
+          }
+      }
+    }
+    return null;
+  }
+
+  /// Singleton [TranscodePolicyTypeTransformer] instance.
+  static TranscodePolicyTypeTransformer? _instance;
+}
+

mobile/openapi/lib/model/video_codec.dart

@@ -0,0 +1,88 @@
+//
+// AUTO-GENERATED FILE, DO NOT MODIFY!
+//
+// @dart=2.12
+
+// ignore_for_file: unused_element, unused_import
+// ignore_for_file: always_put_required_named_parameters_first
+// ignore_for_file: constant_identifier_names
+// ignore_for_file: lines_longer_than_80_chars
+
+part of openapi.api;
+
+
+class VideoCodec {
+  /// Instantiate a new enum with the provided [value].
+  const VideoCodec._(this.value);
+
+  /// The underlying value of this enum member.
+  final String value;
+
+  @override
+  String toString() => value;
+
+  String toJson() => value;
+
+  static const h264 = VideoCodec._(r'h264');
+  static const hevc = VideoCodec._(r'hevc');
+  static const vp9 = VideoCodec._(r'vp9');
+
+  /// List of all possible values in this [enum][VideoCodec].
+  static const values = <VideoCodec>[
+    h264,
+    hevc,
+    vp9,
+  ];
+
+  static VideoCodec? fromJson(dynamic value) => VideoCodecTypeTransformer().decode(value);
+
+  static List<VideoCodec>? listFromJson(dynamic json, {bool growable = false,}) {
+    final result = <VideoCodec>[];
+    if (json is List && json.isNotEmpty) {
+      for (final row in json) {
+        final value = VideoCodec.fromJson(row);
+        if (value != null) {
+          result.add(value);
+        }
+      }
+    }
+    return result.toList(growable: growable);
+  }
+}
+
+/// Transformation class that can [encode] an instance of [VideoCodec] to String,
+/// and [decode] dynamic data back to [VideoCodec].
+class VideoCodecTypeTransformer {
+  factory VideoCodecTypeTransformer() => _instance ??= const VideoCodecTypeTransformer._();
+
+  const VideoCodecTypeTransformer._();
+
+  String encode(VideoCodec data) => data.value;
+
+  /// Decodes a [dynamic value][data] to a VideoCodec.
+  ///
+  /// If [allowNull] is true and the [dynamic value][data] cannot be decoded successfully,
+  /// then null is returned. However, if [allowNull] is false and the [dynamic value][data]
+  /// cannot be decoded successfully, then an [UnimplementedError] is thrown.
+  ///
+  /// The [allowNull] is very handy when an API changes and a new enum value is added or removed,
+  /// and users are still using an old app with the old code.
+  VideoCodec? decode(dynamic data, {bool allowNull = true}) {
+    if (data != null) {
+      switch (data) {
+        case r'h264': return VideoCodec.h264;
+        case r'hevc': return VideoCodec.hevc;
+        case r'vp9': return VideoCodec.vp9;
+        default:
+          if (!allowNull) {
+            throw ArgumentError('Unknown enum value to decode: $data');
+          }
+      }
+    }
+    return null;
+  }
+
+  /// Singleton [VideoCodecTypeTransformer] instance.
+  static VideoCodecTypeTransformer? _instance;
+}
+

mobile/openapi/test/audio_codec_test.dart

@@ -0,0 +1,21 @@
+//
+// AUTO-GENERATED FILE, DO NOT MODIFY!
+//
+// @dart=2.12
+
+// ignore_for_file: unused_element, unused_import
+// ignore_for_file: always_put_required_named_parameters_first
+// ignore_for_file: constant_identifier_names
+// ignore_for_file: lines_longer_than_80_chars
+
+import 'package:openapi/api.dart';
+import 'package:test/test.dart';
+
+// tests for AudioCodec
+void main() {
+
+  group('test AudioCodec', () {
+
+  });
+
+}

mobile/openapi/test/system_config_f_fmpeg_dto_test.dart

@@ -26,21 +26,26 @@ void main() {
       // TODO
     });
 
-    // String preset
+    // VideoCodec targetVideoCodec
-    test('to test the property `preset`', () async {
-      // TODO
-    });
-
-    // String targetVideoCodec
     test('to test the property `targetVideoCodec`', () async {
       // TODO
     });
 
-    // String targetAudioCodec
+    // AudioCodec targetAudioCodec
     test('to test the property `targetAudioCodec`', () async {
       // TODO
     });
 
+    // TranscodePolicy transcode
+    test('to test the property `transcode`', () async {
+      // TODO
+    });
+
+    // String preset
+    test('to test the property `preset`', () async {
+      // TODO
+    });
+
     // String targetResolution
     test('to test the property `targetResolution`', () async {
       // TODO
@@ -56,11 +61,6 @@ void main() {
       // TODO
     });
 
-    // String transcode
-    test('to test the property `transcode`', () async {
-      // TODO
-    });
-
 
   });
 

mobile/openapi/test/transcode_policy_test.dart

@@ -0,0 +1,21 @@
+//
+// AUTO-GENERATED FILE, DO NOT MODIFY!
+//
+// @dart=2.12
+
+// ignore_for_file: unused_element, unused_import
+// ignore_for_file: always_put_required_named_parameters_first
+// ignore_for_file: constant_identifier_names
+// ignore_for_file: lines_longer_than_80_chars
+
+import 'package:openapi/api.dart';
+import 'package:test/test.dart';
+
+// tests for TranscodePolicy
+void main() {
+
+  group('test TranscodePolicy', () {
+
+  });
+
+}

mobile/openapi/test/video_codec_test.dart

@@ -0,0 +1,21 @@
+//
+// AUTO-GENERATED FILE, DO NOT MODIFY!
+//
+// @dart=2.12
+
+// ignore_for_file: unused_element, unused_import
+// ignore_for_file: always_put_required_named_parameters_first
+// ignore_for_file: constant_identifier_names
+// ignore_for_file: lines_longer_than_80_chars
+
+import 'package:openapi/api.dart';
+import 'package:test/test.dart';
+
+// tests for VideoCodec
+void main() {
+
+  group('test VideoCodec', () {
+
+  });
+
+}

server/immich-openapi-specs.json

@@ -4929,6 +4929,14 @@
           "OTHER"
         ]
       },
+      "AudioCodec": {
+        "type": "string",
+        "enum": [
+          "mp3",
+          "aac",
+          "opus"
+        ]
+      },
       "AuthDeviceResponseDto": {
         "type": "object",
         "properties": {
@@ -6347,13 +6355,16 @@
           "threads": {
             "type": "integer"
           },
-          "preset": {
-            "type": "string"
-          },
           "targetVideoCodec": {
-            "type": "string"
+            "$ref": "#/components/schemas/VideoCodec"
           },
           "targetAudioCodec": {
+            "$ref": "#/components/schemas/AudioCodec"
+          },
+          "transcode": {
+            "$ref": "#/components/schemas/TranscodePolicy"
+          },
+          "preset": {
             "type": "string"
           },
           "targetResolution": {
@@ -6364,27 +6375,18 @@
           },
           "twoPass": {
             "type": "boolean"
-          },
-          "transcode": {
-            "type": "string",
-            "enum": [
-              "all",
-              "optimal",
-              "required",
-              "disabled"
-            ]
           }
         },
         "required": [
           "crf",
           "threads",
-          "preset",
           "targetVideoCodec",
           "targetAudioCodec",
+          "transcode",
+          "preset",
           "targetResolution",
           "maxBitrate",
-          "twoPass",
+          "twoPass"
-          "transcode"
         ]
       },
       "SystemConfigJobDto": {
@@ -6604,6 +6606,15 @@
           "month"
         ]
       },
+      "TranscodePolicy": {
+        "type": "string",
+        "enum": [
+          "all",
+          "optimal",
+          "required",
+          "disabled"
+        ]
+      },
       "UpdateAlbumDto": {
         "type": "object",
         "properties": {
@@ -6804,6 +6815,14 @@
         "required": [
           "authStatus"
         ]
+      },
+      "VideoCodec": {
+        "type": "string",
+        "enum": [
+          "h264",
+          "hevc",
+          "vp9"
+        ]
       }
     }
   }

server/src/domain/media/media.repository.ts

@@ -39,10 +39,22 @@ export interface CropOptions {
 }
 
 export interface TranscodeOptions {
+  inputOptions: string[];
   outputOptions: string[];
   twoPass: boolean;
 }
 
+export interface BitrateDistribution {
+  max: number;
+  target: number;
+  min: number;
+  unit: string;
+}
+
+export interface VideoCodecSWConfig {
+  getOptions(stream: VideoStreamInfo): TranscodeOptions;
+}
+
 export interface IMediaRepository {
   // image
   resize(input: string | Buffer, output: string, options: ResizeOptions): Promise<void>;

server/src/domain/media/media.service.spec.ts

@@ -1,4 +1,4 @@
-import { AssetType, SystemConfigKey } from '@app/infra/entities';
+import { AssetType, SystemConfigKey, TranscodePolicy, VideoCodec } from '@app/infra/entities';
 import {
   assetEntityStub,
   newAssetRepositoryMock,
@@ -104,6 +104,13 @@ describe(MediaService.name, () => {
   });
 
   describe('handleGenerateJpegThumbnail', () => {
+    it('should skip thumbnail generation if asset not found', async () => {
+      assetMock.getByIds.mockResolvedValue([]);
+      await sut.handleGenerateJpegThumbnail({ id: assetEntityStub.image.id });
+      expect(mediaMock.resize).not.toHaveBeenCalled();
+      expect(assetMock.save).not.toHaveBeenCalledWith();
+    });
+
     it('should generate a thumbnail for an image', async () => {
       assetMock.getByIds.mockResolvedValue([assetEntityStub.image]);
       await sut.handleGenerateJpegThumbnail({ id: assetEntityStub.image.id });
@@ -142,15 +149,22 @@ describe(MediaService.name, () => {
   });
 
   describe('handleGenerateWebpThumbnail', () => {
+    it('should skip thumbnail generation if asset not found', async () => {
+      assetMock.getByIds.mockResolvedValue([]);
+      await sut.handleGenerateWebpThumbnail({ id: assetEntityStub.image.id });
+      expect(mediaMock.resize).not.toHaveBeenCalled();
+      expect(assetMock.save).not.toHaveBeenCalledWith();
+    });
+
     it('should skip thumbnail generate if resize path is missing', async () => {
       assetMock.getByIds.mockResolvedValue([assetEntityStub.noResizePath]);
-      await sut.handleGenerateWepbThumbnail({ id: assetEntityStub.noResizePath.id });
+      await sut.handleGenerateWebpThumbnail({ id: assetEntityStub.noResizePath.id });
       expect(mediaMock.resize).not.toHaveBeenCalled();
     });
 
     it('should generate a thumbnail', async () => {
       assetMock.getByIds.mockResolvedValue([assetEntityStub.image]);
-      await sut.handleGenerateWepbThumbnail({ id: assetEntityStub.image.id });
+      await sut.handleGenerateWebpThumbnail({ id: assetEntityStub.image.id });
 
       expect(mediaMock.resize).toHaveBeenCalledWith(
         '/uploads/user-id/thumbs/path.ext',
@@ -162,6 +176,12 @@ describe(MediaService.name, () => {
   });
 
   describe('handleGenerateThumbhashThumbnail', () => {
+    it('should skip thumbhash generation if asset not found', async () => {
+      assetMock.getByIds.mockResolvedValue([]);
+      await sut.handleGenerateThumbhashThumbnail({ id: assetEntityStub.image.id });
+      expect(mediaMock.generateThumbhash).not.toHaveBeenCalled();
+    });
+
     it('should skip thumbhash generation if resize path is missing', async () => {
       assetMock.getByIds.mockResolvedValue([assetEntityStub.noResizePath]);
       await sut.handleGenerateThumbhashThumbnail({ id: assetEntityStub.noResizePath.id });
@@ -219,6 +239,20 @@ describe(MediaService.name, () => {
       assetMock.getByIds.mockResolvedValue([assetEntityStub.video]);
     });
 
+    it('should skip transcoding if asset not found', async () => {
+      assetMock.getByIds.mockResolvedValue([]);
+      await sut.handleVideoConversion({ id: assetEntityStub.video.id });
+      expect(mediaMock.probe).not.toHaveBeenCalled();
+      expect(mediaMock.transcode).not.toHaveBeenCalled();
+    });
+
+    it('should skip transcoding if non-video asset', async () => {
+      assetMock.getByIds.mockResolvedValue([assetEntityStub.image]);
+      await sut.handleVideoConversion({ id: assetEntityStub.image.id });
+      expect(mediaMock.probe).not.toHaveBeenCalled();
+      expect(mediaMock.transcode).not.toHaveBeenCalled();
+    });
+
     it('should transcode the longest stream', async () => {
       assetMock.getByIds.mockResolvedValue([assetEntityStub.video]);
       mediaMock.probe.mockResolvedValue(probeStub.multipleVideoStreams);
@@ -232,6 +266,7 @@ describe(MediaService.name, () => {
         '/original/path.ext',
         'upload/encoded-video/user-id/asset-id.mp4',
         {
+          inputOptions: [],
           outputOptions: [
             '-vcodec h264',
             '-acodec aac',
@@ -261,13 +296,14 @@ describe(MediaService.name, () => {
 
     it('should transcode when set to all', async () => {
       mediaMock.probe.mockResolvedValue(probeStub.multipleVideoStreams);
-      configMock.load.mockResolvedValue([{ key: SystemConfigKey.FFMPEG_TRANSCODE, value: 'all' }]);
+      configMock.load.mockResolvedValue([{ key: SystemConfigKey.FFMPEG_TRANSCODE, value: TranscodePolicy.ALL }]);
       assetMock.getByIds.mockResolvedValue([assetEntityStub.video]);
       await sut.handleVideoConversion({ id: assetEntityStub.video.id });
       expect(mediaMock.transcode).toHaveBeenCalledWith(
         '/original/path.ext',
         'upload/encoded-video/user-id/asset-id.mp4',
         {
+          inputOptions: [],
           outputOptions: [
             '-vcodec h264',
             '-acodec aac',
@@ -283,12 +319,13 @@ describe(MediaService.name, () => {
 
     it('should transcode when optimal and too big', async () => {
       mediaMock.probe.mockResolvedValue(probeStub.videoStream2160p);
-      configMock.load.mockResolvedValue([{ key: SystemConfigKey.FFMPEG_TRANSCODE, value: 'optimal' }]);
+      configMock.load.mockResolvedValue([{ key: SystemConfigKey.FFMPEG_TRANSCODE, value: TranscodePolicy.OPTIMAL }]);
       await sut.handleVideoConversion({ id: assetEntityStub.video.id });
       expect(mediaMock.transcode).toHaveBeenCalledWith(
         '/original/path.ext',
         'upload/encoded-video/user-id/asset-id.mp4',
         {
+          inputOptions: [],
           outputOptions: [
             '-vcodec h264',
             '-acodec aac',
@@ -306,7 +343,7 @@ describe(MediaService.name, () => {
     it('should not scale resolution if no target resolution', async () => {
       mediaMock.probe.mockResolvedValue(probeStub.videoStream2160p);
       configMock.load.mockResolvedValue([
-        { key: SystemConfigKey.FFMPEG_TRANSCODE, value: 'all' },
+        { key: SystemConfigKey.FFMPEG_TRANSCODE, value: TranscodePolicy.ALL },
         { key: SystemConfigKey.FFMPEG_TARGET_RESOLUTION, value: 'original' },
       ]);
       await sut.handleVideoConversion({ id: assetEntityStub.video.id });
@@ -314,6 +351,7 @@ describe(MediaService.name, () => {
         '/original/path.ext',
         'upload/encoded-video/user-id/asset-id.mp4',
         {
+          inputOptions: [],
           outputOptions: [
             '-vcodec h264',
             '-acodec aac',
@@ -329,13 +367,14 @@ describe(MediaService.name, () => {
 
     it('should transcode with alternate scaling video is vertical', async () => {
       mediaMock.probe.mockResolvedValue(probeStub.videoStreamVertical2160p);
-      configMock.load.mockResolvedValue([{ key: SystemConfigKey.FFMPEG_TRANSCODE, value: 'optimal' }]);
+      configMock.load.mockResolvedValue([{ key: SystemConfigKey.FFMPEG_TRANSCODE, value: TranscodePolicy.OPTIMAL }]);
       assetMock.getByIds.mockResolvedValue([assetEntityStub.video]);
       await sut.handleVideoConversion({ id: assetEntityStub.video.id });
       expect(mediaMock.transcode).toHaveBeenCalledWith(
         '/original/path.ext',
         'upload/encoded-video/user-id/asset-id.mp4',
         {
+          inputOptions: [],
           outputOptions: [
             '-vcodec h264',
             '-acodec aac',
@@ -352,13 +391,14 @@ describe(MediaService.name, () => {
 
     it('should transcode when audio doesnt match target', async () => {
       mediaMock.probe.mockResolvedValue(probeStub.audioStreamMp3);
-      configMock.load.mockResolvedValue([{ key: SystemConfigKey.FFMPEG_TRANSCODE, value: 'optimal' }]);
+      configMock.load.mockResolvedValue([{ key: SystemConfigKey.FFMPEG_TRANSCODE, value: TranscodePolicy.OPTIMAL }]);
       assetMock.getByIds.mockResolvedValue([assetEntityStub.video]);
       await sut.handleVideoConversion({ id: assetEntityStub.video.id });
       expect(mediaMock.transcode).toHaveBeenCalledWith(
         '/original/path.ext',
         'upload/encoded-video/user-id/asset-id.mp4',
         {
+          inputOptions: [],
           outputOptions: [
             '-vcodec h264',
             '-acodec aac',
@@ -375,13 +415,14 @@ describe(MediaService.name, () => {
 
     it('should transcode when container doesnt match target', async () => {
       mediaMock.probe.mockResolvedValue(probeStub.matroskaContainer);
-      configMock.load.mockResolvedValue([{ key: SystemConfigKey.FFMPEG_TRANSCODE, value: 'optimal' }]);
+      configMock.load.mockResolvedValue([{ key: SystemConfigKey.FFMPEG_TRANSCODE, value: TranscodePolicy.OPTIMAL }]);
       assetMock.getByIds.mockResolvedValue([assetEntityStub.video]);
       await sut.handleVideoConversion({ id: assetEntityStub.video.id });
       expect(mediaMock.transcode).toHaveBeenCalledWith(
         '/original/path.ext',
         'upload/encoded-video/user-id/asset-id.mp4',
         {
+          inputOptions: [],
           outputOptions: [
             '-vcodec h264',
             '-acodec aac',
@@ -404,6 +445,22 @@ describe(MediaService.name, () => {
       expect(mediaMock.transcode).not.toHaveBeenCalled();
     });
 
+    it('should not transcode if transcoding is disabled', async () => {
+      mediaMock.probe.mockResolvedValue(probeStub.videoStream2160p);
+      configMock.load.mockResolvedValue([{ key: SystemConfigKey.FFMPEG_TRANSCODE, value: TranscodePolicy.DISABLED }]);
+      assetMock.getByIds.mockResolvedValue([assetEntityStub.video]);
+      await sut.handleVideoConversion({ id: assetEntityStub.video.id });
+      expect(mediaMock.transcode).not.toHaveBeenCalled();
+    });
+
+    it('should not transcode if target codec is invalid', async () => {
+      mediaMock.probe.mockResolvedValue(probeStub.videoStream2160p);
+      configMock.load.mockResolvedValue([{ key: SystemConfigKey.FFMPEG_TARGET_VIDEO_CODEC, value: 'invalid' }]);
+      assetMock.getByIds.mockResolvedValue([assetEntityStub.video]);
+      await sut.handleVideoConversion({ id: assetEntityStub.video.id });
+      expect(mediaMock.transcode).not.toHaveBeenCalled();
+    });
+
     it('should set max bitrate if above 0', async () => {
       mediaMock.probe.mockResolvedValue(probeStub.matroskaContainer);
       configMock.load.mockResolvedValue([{ key: SystemConfigKey.FFMPEG_MAX_BITRATE, value: '4500k' }]);
@@ -413,6 +470,7 @@ describe(MediaService.name, () => {
         '/original/path.ext',
         'upload/encoded-video/user-id/asset-id.mp4',
         {
+          inputOptions: [],
           outputOptions: [
             '-vcodec h264',
             '-acodec aac',
@@ -441,6 +499,7 @@ describe(MediaService.name, () => {
         '/original/path.ext',
         'upload/encoded-video/user-id/asset-id.mp4',
         {
+          inputOptions: [],
           outputOptions: [
             '-vcodec h264',
             '-acodec aac',
@@ -466,6 +525,7 @@ describe(MediaService.name, () => {
         '/original/path.ext',
         'upload/encoded-video/user-id/asset-id.mp4',
         {
+          inputOptions: [],
           outputOptions: [
             '-vcodec h264',
             '-acodec aac',
@@ -480,11 +540,12 @@ describe(MediaService.name, () => {
       );
     });
 
-    it('should configure preset for vp9', async () => {
+    it('should transcode by bitrate in two passes for vp9 when two pass mode and max bitrate are enabled', async () => {
       mediaMock.probe.mockResolvedValue(probeStub.matroskaContainer);
       configMock.load.mockResolvedValue([
-        { key: SystemConfigKey.FFMPEG_TARGET_VIDEO_CODEC, value: 'vp9' },
+        { key: SystemConfigKey.FFMPEG_MAX_BITRATE, value: '4500k' },
-        { key: SystemConfigKey.FFMPEG_THREADS, value: 2 },
+        { key: SystemConfigKey.FFMPEG_TWO_PASS, value: true },
+        { key: SystemConfigKey.FFMPEG_TARGET_VIDEO_CODEC, value: VideoCodec.VP9 },
       ]);
       assetMock.getByIds.mockResolvedValue([assetEntityStub.video]);
       await sut.handleVideoConversion({ id: assetEntityStub.video.id });
@@ -492,6 +553,7 @@ describe(MediaService.name, () => {
         '/original/path.ext',
         'upload/encoded-video/user-id/asset-id.mp4',
         {
+          inputOptions: [],
           outputOptions: [
             '-vcodec vp9',
             '-acodec aac',
@@ -500,7 +562,64 @@ describe(MediaService.name, () => {
             '-vf scale=-2:720',
             '-cpu-used 5',
             '-row-mt 1',
-            '-threads 2',
+            '-b:v 3104k',
+            '-minrate 1552k',
+            '-maxrate 4500k',
+          ],
+          twoPass: true,
+        },
+      );
+    });
+
+    it('should configure preset for vp9', async () => {
+      mediaMock.probe.mockResolvedValue(probeStub.matroskaContainer);
+      configMock.load.mockResolvedValue([
+        { key: SystemConfigKey.FFMPEG_TARGET_VIDEO_CODEC, value: VideoCodec.VP9 },
+        { key: SystemConfigKey.FFMPEG_PRESET, value: 'slow' },
+      ]);
+      assetMock.getByIds.mockResolvedValue([assetEntityStub.video]);
+      await sut.handleVideoConversion({ id: assetEntityStub.video.id });
+      expect(mediaMock.transcode).toHaveBeenCalledWith(
+        '/original/path.ext',
+        'upload/encoded-video/user-id/asset-id.mp4',
+        {
+          inputOptions: [],
+          outputOptions: [
+            '-vcodec vp9',
+            '-acodec aac',
+            '-movflags faststart',
+            '-fps_mode passthrough',
+            '-vf scale=-2:720',
+            '-cpu-used 2',
+            '-row-mt 1',
+            '-crf 23',
+            '-b:v 0',
+          ],
+          twoPass: false,
+        },
+      );
+    });
+
+    it('should not configure preset for vp9 if invalid', async () => {
+      mediaMock.probe.mockResolvedValue(probeStub.matroskaContainer);
+      configMock.load.mockResolvedValue([
+        { key: SystemConfigKey.FFMPEG_TARGET_VIDEO_CODEC, value: VideoCodec.VP9 },
+        { key: SystemConfigKey.FFMPEG_PRESET, value: 'invalid' },
+      ]);
+      assetMock.getByIds.mockResolvedValue([assetEntityStub.video]);
+      await sut.handleVideoConversion({ id: assetEntityStub.video.id });
+      expect(mediaMock.transcode).toHaveBeenCalledWith(
+        '/original/path.ext',
+        'upload/encoded-video/user-id/asset-id.mp4',
+        {
+          inputOptions: [],
+          outputOptions: [
+            '-vcodec vp9',
+            '-acodec aac',
+            '-movflags faststart',
+            '-fps_mode passthrough',
+            '-vf scale=-2:720',
+            '-row-mt 1',
             '-crf 23',
             '-b:v 0',
           ],
@@ -512,7 +631,7 @@ describe(MediaService.name, () => {
     it('should configure threads if above 0', async () => {
       mediaMock.probe.mockResolvedValue(probeStub.matroskaContainer);
       configMock.load.mockResolvedValue([
-        { key: SystemConfigKey.FFMPEG_TARGET_VIDEO_CODEC, value: 'vp9' },
+        { key: SystemConfigKey.FFMPEG_TARGET_VIDEO_CODEC, value: VideoCodec.VP9 },
         { key: SystemConfigKey.FFMPEG_THREADS, value: 2 },
       ]);
       assetMock.getByIds.mockResolvedValue([assetEntityStub.video]);
@@ -521,6 +640,7 @@ describe(MediaService.name, () => {
         '/original/path.ext',
         'upload/encoded-video/user-id/asset-id.mp4',
         {
+          inputOptions: [],
           outputOptions: [
             '-vcodec vp9',
             '-acodec aac',
@@ -538,7 +658,7 @@ describe(MediaService.name, () => {
       );
     });
 
-    it('should disable thread pooling for x264/x265 if thread limit is above 0', async () => {
+    it('should disable thread pooling for h264 if thread limit is above 0', async () => {
       mediaMock.probe.mockResolvedValue(probeStub.matroskaContainer);
       configMock.load.mockResolvedValue([{ key: SystemConfigKey.FFMPEG_THREADS, value: 2 }]);
       assetMock.getByIds.mockResolvedValue([assetEntityStub.video]);
@@ -547,6 +667,7 @@ describe(MediaService.name, () => {
         '/original/path.ext',
         'upload/encoded-video/user-id/asset-id.mp4',
         {
+          inputOptions: [],
           outputOptions: [
             '-vcodec h264',
             '-acodec aac',
@@ -563,5 +684,86 @@ describe(MediaService.name, () => {
         },
       );
     });
+
+    it('should omit thread flags for h264 if thread limit is at or below 0', async () => {
+      mediaMock.probe.mockResolvedValue(probeStub.matroskaContainer);
+      configMock.load.mockResolvedValue([{ key: SystemConfigKey.FFMPEG_THREADS, value: 0 }]);
+      assetMock.getByIds.mockResolvedValue([assetEntityStub.video]);
+      await sut.handleVideoConversion({ id: assetEntityStub.video.id });
+      expect(mediaMock.transcode).toHaveBeenCalledWith(
+        '/original/path.ext',
+        'upload/encoded-video/user-id/asset-id.mp4',
+        {
+          inputOptions: [],
+          outputOptions: [
+            '-vcodec h264',
+            '-acodec aac',
+            '-movflags faststart',
+            '-fps_mode passthrough',
+            '-vf scale=-2:720',
+            '-preset ultrafast',
+            '-crf 23',
+          ],
+          twoPass: false,
+        },
+      );
+    });
+
+    it('should disable thread pooling for hevc if thread limit is above 0', async () => {
+      mediaMock.probe.mockResolvedValue(probeStub.matroskaContainer);
+      configMock.load.mockResolvedValue([
+        { key: SystemConfigKey.FFMPEG_THREADS, value: 2 },
+        { key: SystemConfigKey.FFMPEG_TARGET_VIDEO_CODEC, value: VideoCodec.HEVC },
+      ]);
+      assetMock.getByIds.mockResolvedValue([assetEntityStub.video]);
+      await sut.handleVideoConversion({ id: assetEntityStub.video.id });
+      expect(mediaMock.transcode).toHaveBeenCalledWith(
+        '/original/path.ext',
+        'upload/encoded-video/user-id/asset-id.mp4',
+        {
+          inputOptions: [],
+          outputOptions: [
+            '-vcodec hevc',
+            '-acodec aac',
+            '-movflags faststart',
+            '-fps_mode passthrough',
+            '-vf scale=-2:720',
+            '-preset ultrafast',
+            '-threads 2',
+            '-x265-params "pools=none"',
+            '-x265-params "frame-threads=2"',
+            '-crf 23',
+          ],
+          twoPass: false,
+        },
+      );
+    });
+
+    it('should omit thread flags for hevc if thread limit is at or below 0', async () => {
+      mediaMock.probe.mockResolvedValue(probeStub.matroskaContainer);
+      configMock.load.mockResolvedValue([
+        { key: SystemConfigKey.FFMPEG_THREADS, value: 0 },
+        { key: SystemConfigKey.FFMPEG_TARGET_VIDEO_CODEC, value: VideoCodec.HEVC },
+      ]);
+      assetMock.getByIds.mockResolvedValue([assetEntityStub.video]);
+      await sut.handleVideoConversion({ id: assetEntityStub.video.id });
+      expect(mediaMock.transcode).toHaveBeenCalledWith(
+        '/original/path.ext',
+        'upload/encoded-video/user-id/asset-id.mp4',
+        {
+          inputOptions: [],
+          outputOptions: [
+            '-vcodec hevc',
+            '-acodec aac',
+            '-movflags faststart',
+            '-fps_mode passthrough',
+            '-vf scale=-2:720',
+            '-preset ultrafast',
+            '-crf 23',
+          ],
+          twoPass: false,
+        },
+      );
+    });
   });
 });

server/src/domain/media/media.service.ts

@@ -1,5 +1,5 @@
-import { AssetEntity, AssetType, TranscodePreset } from '@app/infra/entities';
+import { AssetEntity, AssetType, TranscodePolicy, VideoCodec } from '@app/infra/entities';
-import { Inject, Injectable, Logger } from '@nestjs/common';
+import { Inject, Injectable, Logger, UnsupportedMediaTypeException } from '@nestjs/common';
 import { join } from 'path';
 import { IAssetRepository, WithoutProperty } from '../asset';
 import { usePagination } from '../domain.util';
@@ -9,6 +9,7 @@ import { ISystemConfigRepository, SystemConfigFFmpegDto } from '../system-config
 import { SystemConfigCore } from '../system-config/system-config.core';
 import { JPEG_THUMBNAIL_SIZE, WEBP_THUMBNAIL_SIZE } from './media.constant';
 import { AudioStreamInfo, IMediaRepository, VideoStreamInfo } from './media.repository';
+import { H264Config, HEVCConfig, VP9Config } from './media.util';
 
 @Injectable()
 export class MediaService {
@@ -82,7 +83,7 @@ export class MediaService {
     return true;
   }
 
-  async handleGenerateWepbThumbnail({ id }: IEntityJob) {
+  async handleGenerateWebpThumbnail({ id }: IEntityJob) {
     const [asset] = await this.assetRepository.getByIds([id]);
     if (!asset || !asset.resizePath) {
       return false;
@@ -152,11 +153,16 @@ export class MediaService {
       return false;
     }
 
-    const outputOptions = this.getFfmpegOptions(mainVideoStream, config);
+    let transcodeOptions;
-    const twoPass = this.eligibleForTwoPass(config);
+    try {
+      transcodeOptions = this.getCodecConfig(config).getOptions(mainVideoStream);
+    } catch (err) {
+      this.logger.error(`An error occurred while configuring transcoding options: ${err}`);
+      return false;
+    }
 
-    this.logger.log(`Start encoding video ${asset.id} ${outputOptions}`);
+    this.logger.log(`Start encoding video ${asset.id} ${JSON.stringify(transcodeOptions)}`);
-    await this.mediaRepository.transcode(input, output, { outputOptions, twoPass });
+    await this.mediaRepository.transcode(input, output, transcodeOptions);
 
     this.logger.log(`Encoding success ${asset.id}`);
 
@@ -199,16 +205,16 @@ export class MediaService {
     const isLargerThanTargetRes = scalingEnabled && Math.min(videoStream.height, videoStream.width) > targetRes;
 
     switch (ffmpegConfig.transcode) {
-      case TranscodePreset.DISABLED:
+      case TranscodePolicy.DISABLED:
         return false;
 
-      case TranscodePreset.ALL:
+      case TranscodePolicy.ALL:
         return true;
 
-      case TranscodePreset.REQUIRED:
+      case TranscodePolicy.REQUIRED:
         return !allTargetsMatching;
 
-      case TranscodePreset.OPTIMAL:
+      case TranscodePolicy.OPTIMAL:
         return !allTargetsMatching || isLargerThanTargetRes;
 
       default:
@@ -216,99 +222,16 @@ export class MediaService {
     }
   }
 
-  private getFfmpegOptions(stream: VideoStreamInfo, ffmpeg: SystemConfigFFmpegDto) {
+  private getCodecConfig(config: SystemConfigFFmpegDto) {
-    const options = [
+    switch (config.targetVideoCodec) {
-      `-vcodec ${ffmpeg.targetVideoCodec}`,
+      case VideoCodec.H264:
-      `-acodec ${ffmpeg.targetAudioCodec}`,
+        return new H264Config(config);
-      // Makes a second pass moving the moov atom to the beginning of
+      case VideoCodec.HEVC:
-      // the file for improved playback speed.
+        return new HEVCConfig(config);
-      '-movflags faststart',
+      case VideoCodec.VP9:
-      '-fps_mode passthrough',
+        return new VP9Config(config);
-    ];
+      default:
-
+        throw new UnsupportedMediaTypeException(`Codec '${config.targetVideoCodec}' is unsupported`);
-    // video dimensions
-    const videoIsRotated = Math.abs(stream.rotation) === 90;
-    const scalingEnabled = ffmpeg.targetResolution !== 'original';
-    const targetResolution = Number.parseInt(ffmpeg.targetResolution);
-    const isVideoVertical = stream.height > stream.width || videoIsRotated;
-    const scaling = isVideoVertical ? `${targetResolution}:-2` : `-2:${targetResolution}`;
-    const shouldScale = scalingEnabled && Math.min(stream.height, stream.width) > targetResolution;
-
-    // video codec
-    const isVP9 = ffmpeg.targetVideoCodec === 'vp9';
-    const isH264 = ffmpeg.targetVideoCodec === 'h264';
-    const isH265 = ffmpeg.targetVideoCodec === 'hevc';
-
-    // transcode efficiency
-    const limitThreads = ffmpeg.threads > 0;
-    const maxBitrateValue = Number.parseInt(ffmpeg.maxBitrate) || 0;
-    const constrainMaximumBitrate = maxBitrateValue > 0;
-    const bitrateUnit = ffmpeg.maxBitrate.trim().substring(maxBitrateValue.toString().length); // use inputted unit if provided
-
-    if (shouldScale) {
-      options.push(`-vf scale=${scaling}`);
-    }
-
-    if (isH264 || isH265) {
-      options.push(`-preset ${ffmpeg.preset}`);
-    }
-
-    if (isVP9) {
-      // vp9 doesn't have presets, but does have a similar setting -cpu-used, from 0-5, 0 being the slowest
-      const presets = ['veryslow', 'slower', 'slow', 'medium', 'fast', 'faster', 'veryfast', 'superfast', 'ultrafast'];
-      const speed = Math.min(presets.indexOf(ffmpeg.preset), 5); // values over 5 require realtime mode, which is its own can of worms since it overrides -crf and -threads
-      if (speed >= 0) {
-        options.push(`-cpu-used ${speed}`);
-      }
-      options.push('-row-mt 1'); // better multithreading
-    }
-
-    if (limitThreads) {
-      options.push(`-threads ${ffmpeg.threads}`);
-
-      // x264 and x265 handle threads differently than one might expect
-      // https://x265.readthedocs.io/en/latest/cli.html#cmdoption-pools
-      if (isH264 || isH265) {
-        options.push(`-${isH265 ? 'x265' : 'x264'}-params "pools=none"`);
-        options.push(`-${isH265 ? 'x265' : 'x264'}-params "frame-threads=${ffmpeg.threads}"`);
     }
   }
-
-    // two-pass mode for x264/x265 uses bitrate ranges, so it requires a max bitrate from which to derive a target and min bitrate
-    if (constrainMaximumBitrate && ffmpeg.twoPass) {
-      const targetBitrateValue = Math.ceil(maxBitrateValue / 1.45); // recommended by https://developers.google.com/media/vp9/settings/vod
-      const minBitrateValue = targetBitrateValue / 2;
-
-      options.push(`-b:v ${targetBitrateValue}${bitrateUnit}`);
-      options.push(`-minrate ${minBitrateValue}${bitrateUnit}`);
-      options.push(`-maxrate ${maxBitrateValue}${bitrateUnit}`);
-    } else if (constrainMaximumBitrate || isVP9) {
-      // for vp9, these flags work for both one-pass and two-pass
-      options.push(`-crf ${ffmpeg.crf}`);
-      if (isVP9) {
-        options.push(`-b:v ${maxBitrateValue}${bitrateUnit}`);
-      } else {
-        options.push(`-maxrate ${maxBitrateValue}${bitrateUnit}`);
-        // -bufsize is the peak possible bitrate at any moment, while -maxrate is the max rolling average bitrate
-        // needed for -maxrate to be enforced
-        options.push(`-bufsize ${maxBitrateValue * 2}${bitrateUnit}`);
-      }
-    } else {
-      options.push(`-crf ${ffmpeg.crf}`);
-    }
-
-    return options;
-  }
-
-  private eligibleForTwoPass(ffmpeg: SystemConfigFFmpegDto) {
-    if (!ffmpeg.twoPass) {
-      return false;
-    }
-
-    const isVP9 = ffmpeg.targetVideoCodec === 'vp9';
-    const maxBitrateValue = Number.parseInt(ffmpeg.maxBitrate) || 0;
-    const constrainMaximumBitrate = maxBitrateValue > 0;
-
-    return constrainMaximumBitrate || isVP9;
-  }
 }

server/src/domain/media/media.util.ts

@@ -0,0 +1,191 @@
+import { SystemConfigFFmpegDto } from '../system-config/dto';
+import { BitrateDistribution, TranscodeOptions, VideoCodecSWConfig, VideoStreamInfo } from './media.repository';
+
+class BaseConfig implements VideoCodecSWConfig {
+  constructor(protected config: SystemConfigFFmpegDto) {}
+
+  getOptions(stream: VideoStreamInfo) {
+    const options = {
+      inputOptions: this.getBaseInputOptions(),
+      outputOptions: this.getBaseOutputOptions(),
+      twoPass: this.eligibleForTwoPass(),
+    } as TranscodeOptions;
+    const filters = this.getFilterOptions(stream);
+    if (filters.length > 0) {
+      options.outputOptions.push(`-vf ${filters.join(',')}`);
+    }
+    options.outputOptions.push(...this.getPresetOptions());
+    options.outputOptions.push(...this.getThreadOptions());
+    options.outputOptions.push(...this.getBitrateOptions());
+
+    return options;
+  }
+
+  getBaseInputOptions(): string[] {
+    return [];
+  }
+
+  getBaseOutputOptions() {
+    return [
+      `-vcodec ${this.config.targetVideoCodec}`,
+      `-acodec ${this.config.targetAudioCodec}`,
+      // Makes a second pass moving the moov atom to the beginning of
+      // the file for improved playback speed.
+      '-movflags faststart',
+      '-fps_mode passthrough',
+    ];
+  }
+
+  getFilterOptions(stream: VideoStreamInfo) {
+    const options = [];
+    if (this.shouldScale(stream)) {
+      options.push(`scale=${this.getScaling(stream)}`);
+    }
+
+    return options;
+  }
+
+  getPresetOptions() {
+    return [`-preset ${this.config.preset}`];
+  }
+
+  getBitrateOptions() {
+    const bitrates = this.getBitrateDistribution();
+    if (this.eligibleForTwoPass()) {
+      return [
+        `-b:v ${bitrates.target}${bitrates.unit}`,
+        `-minrate ${bitrates.min}${bitrates.unit}`,
+        `-maxrate ${bitrates.max}${bitrates.unit}`,
+      ];
+    } else if (bitrates.max > 0) {
+      // -bufsize is the peak possible bitrate at any moment, while -maxrate is the max rolling average bitrate
+      return [
+        `-crf ${this.config.crf}`,
+        `-maxrate ${bitrates.max}${bitrates.unit}`,
+        `-bufsize ${bitrates.max * 2}${bitrates.unit}`,
+      ];
+    } else {
+      return [`-crf ${this.config.crf}`];
+    }
+  }
+
+  getThreadOptions(): Array<string> {
+    if (this.config.threads <= 0) {
+      return [];
+    }
+    return [`-threads ${this.config.threads}`];
+  }
+
+  eligibleForTwoPass() {
+    if (!this.config.twoPass) {
+      return false;
+    }
+
+    return this.isBitrateConstrained() || this.config.targetVideoCodec === 'vp9';
+  }
+
+  getBitrateDistribution() {
+    const max = this.getMaxBitrateValue();
+    const target = Math.ceil(max / 1.45); // recommended by https://developers.google.com/media/vp9/settings/vod
+    const min = target / 2;
+    const unit = this.getBitrateUnit();
+
+    return { max, target, min, unit } as BitrateDistribution;
+  }
+
+  getTargetResolution(stream: VideoStreamInfo) {
+    if (this.config.targetResolution === 'original') {
+      return Math.min(stream.height, stream.width);
+    }
+
+    return Number.parseInt(this.config.targetResolution);
+  }
+
+  shouldScale(stream: VideoStreamInfo) {
+    return Math.min(stream.height, stream.width) > this.getTargetResolution(stream);
+  }
+
+  getScaling(stream: VideoStreamInfo) {
+    const targetResolution = this.getTargetResolution(stream);
+    return this.isVideoVertical(stream) ? `${targetResolution}:-2` : `-2:${targetResolution}`;
+  }
+
+  isVideoRotated(stream: VideoStreamInfo) {
+    return Math.abs(stream.rotation) === 90;
+  }
+
+  isVideoVertical(stream: VideoStreamInfo) {
+    return stream.height > stream.width || this.isVideoRotated(stream);
+  }
+
+  isBitrateConstrained() {
+    return this.getMaxBitrateValue() > 0;
+  }
+
+  getBitrateUnit() {
+    const maxBitrate = this.getMaxBitrateValue();
+    return this.config.maxBitrate.trim().substring(maxBitrate.toString().length); // use inputted unit if provided
+  }
+
+  getMaxBitrateValue() {
+    return Number.parseInt(this.config.maxBitrate) || 0;
+  }
+
+  getPresetIndex() {
+    const presets = ['veryslow', 'slower', 'slow', 'medium', 'fast', 'faster', 'veryfast', 'superfast', 'ultrafast'];
+    return presets.indexOf(this.config.preset);
+  }
+}
+
+export class H264Config extends BaseConfig {
+  getThreadOptions() {
+    if (this.config.threads <= 0) {
+      return [];
+    }
+    return [
+      ...super.getThreadOptions(),
+      '-x264-params "pools=none"',
+      `-x264-params "frame-threads=${this.config.threads}"`,
+    ];
+  }
+}
+
+export class HEVCConfig extends BaseConfig {
+  getThreadOptions() {
+    if (this.config.threads <= 0) {
+      return [];
+    }
+    return [
+      ...super.getThreadOptions(),
+      '-x265-params "pools=none"',
+      `-x265-params "frame-threads=${this.config.threads}"`,
+    ];
+  }
+}
+
+export class VP9Config extends BaseConfig {
+  getPresetOptions() {
+    const speed = Math.min(this.getPresetIndex(), 5); // values over 5 require realtime mode, which is its own can of worms since it overrides -crf and -threads
+    if (speed >= 0) {
+      return [`-cpu-used ${speed}`];
+    }
+    return [];
+  }
+
+  getBitrateOptions() {
+    const bitrates = this.getBitrateDistribution();
+    if (this.eligibleForTwoPass()) {
+      return [
+        `-b:v ${bitrates.target}${bitrates.unit}`,
+        `-minrate ${bitrates.min}${bitrates.unit}`,
+        `-maxrate ${bitrates.max}${bitrates.unit}`,
+      ];
+    }
+
+    return [`-crf ${this.config.crf}`, `-b:v ${bitrates.max}${bitrates.unit}`];
+  }
+
+  getThreadOptions() {
+    return ['-row-mt 1', ...super.getThreadOptions()];
+  }
+}

server/src/domain/system-config/dto/system-config-ffmpeg.dto.ts

@@ -1,4 +1,4 @@
-import { TranscodePreset } from '@app/infra/entities';
+import { AudioCodec, TranscodePolicy, VideoCodec } from '@app/infra/entities';
 import { ApiProperty } from '@nestjs/swagger';
 import { Type } from 'class-transformer';
 import { IsBoolean, IsEnum, IsInt, IsString, Max, Min } from 'class-validator';
@@ -20,11 +20,13 @@ export class SystemConfigFFmpegDto {
   @IsString()
   preset!: string;
 
-  @IsString()
+  @IsEnum(VideoCodec)
-  targetVideoCodec!: string;
+  @ApiProperty({ enumName: 'VideoCodec', enum: VideoCodec })
+  targetVideoCodec!: VideoCodec;
 
-  @IsString()
+  @IsEnum(AudioCodec)
-  targetAudioCodec!: string;
+  @ApiProperty({ enumName: 'AudioCodec', enum: AudioCodec })
+  targetAudioCodec!: AudioCodec;
 
   @IsString()
   targetResolution!: string;
@@ -35,6 +37,7 @@ export class SystemConfigFFmpegDto {
   @IsBoolean()
   twoPass!: boolean;
 
-  @IsEnum(TranscodePreset)
+  @IsEnum(TranscodePolicy)
-  transcode!: TranscodePreset;
+  @ApiProperty({ enumName: 'TranscodePolicy', enum: TranscodePolicy })
+  transcode!: TranscodePolicy;
 }

server/src/domain/system-config/system-config.core.ts

@@ -1,9 +1,11 @@
 import {
+  AudioCodec,
   SystemConfig,
   SystemConfigEntity,
   SystemConfigKey,
   SystemConfigValue,
-  TranscodePreset,
+  TranscodePolicy,
+  VideoCodec,
 } from '@app/infra/entities';
 import { BadRequestException, Injectable, Logger } from '@nestjs/common';
 import * as _ from 'lodash';
@@ -19,12 +21,12 @@ const defaults = Object.freeze<SystemConfig>({
     crf: 23,
     threads: 0,
     preset: 'ultrafast',
-    targetVideoCodec: 'h264',
+    targetVideoCodec: VideoCodec.H264,
-    targetAudioCodec: 'aac',
+    targetAudioCodec: AudioCodec.AAC,
     targetResolution: '720',
     maxBitrate: '0',
     twoPass: false,
-    transcode: TranscodePreset.REQUIRED,
+    transcode: TranscodePolicy.REQUIRED,
   },
   job: {
     [QueueName.BACKGROUND_TASK]: { concurrency: 5 },

server/src/domain/system-config/system-config.service.spec.ts

@@ -1,4 +1,11 @@
-import { SystemConfig, SystemConfigEntity, SystemConfigKey, TranscodePreset } from '@app/infra/entities';
+import {
+  AudioCodec,
+  SystemConfig,
+  SystemConfigEntity,
+  SystemConfigKey,
+  TranscodePolicy,
+  VideoCodec,
+} from '@app/infra/entities';
 import { BadRequestException } from '@nestjs/common';
 import { newJobRepositoryMock, newSystemConfigRepositoryMock, systemConfigStub } from '@test';
 import { IJobRepository, JobName, QueueName } from '../job';
@@ -28,12 +35,12 @@ const updatedConfig = Object.freeze<SystemConfig>({
     crf: 30,
     threads: 0,
     preset: 'ultrafast',
-    targetAudioCodec: 'aac',
+    targetAudioCodec: AudioCodec.AAC,
     targetResolution: '720',
-    targetVideoCodec: 'h264',
+    targetVideoCodec: VideoCodec.H264,
     maxBitrate: '0',
     twoPass: false,
-    transcode: TranscodePreset.REQUIRED,
+    transcode: TranscodePolicy.REQUIRED,
   },
   oauth: {
     autoLaunch: true,

server/src/infra/entities/system-config.entity.ts

@@ -51,24 +51,36 @@ export enum SystemConfigKey {
   STORAGE_TEMPLATE = 'storageTemplate.template',
 }
 
-export enum TranscodePreset {
+export enum TranscodePolicy {
   ALL = 'all',
   OPTIMAL = 'optimal',
   REQUIRED = 'required',
   DISABLED = 'disabled',
 }
 
+export enum VideoCodec {
+  H264 = 'h264',
+  HEVC = 'hevc',
+  VP9 = 'vp9',
+}
+
+export enum AudioCodec {
+  MP3 = 'mp3',
+  AAC = 'aac',
+  OPUS = 'opus',
+}
+
 export interface SystemConfig {
   ffmpeg: {
     crf: number;
     threads: number;
     preset: string;
-    targetVideoCodec: string;
+    targetVideoCodec: VideoCodec;
-    targetAudioCodec: string;
+    targetAudioCodec: AudioCodec;
     targetResolution: string;
     maxBitrate: string;
     twoPass: boolean;
-    transcode: TranscodePreset;
+    transcode: TranscodePolicy;
   };
   job: Record<QueueName, { concurrency: number }>;
   oauth: {

server/src/infra/infra.module.ts

@@ -65,7 +65,6 @@ const providers: Provider[] = [
   { provide: IJobRepository, useClass: JobRepository },
   { provide: IKeyRepository, useClass: APIKeyRepository },
   { provide: IMachineLearningRepository, useClass: MachineLearningRepository },
-  { provide: IMediaRepository, useClass: MediaRepository },
   { provide: IPartnerRepository, useClass: PartnerRepository },
   { provide: IPersonRepository, useClass: PersonRepository },
   { provide: ISearchRepository, useClass: TypesenseRepository },
@@ -74,6 +73,7 @@ const providers: Provider[] = [
   { provide: IStorageRepository, useClass: FilesystemProvider },
   { provide: ISystemConfigRepository, useClass: SystemConfigRepository },
   { provide: ITagRepository, useClass: TagRepository },
+  { provide: IMediaRepository, useClass: MediaRepository },
   { provide: IUserRepository, useClass: UserRepository },
   { provide: IUserTokenRepository, useClass: UserTokenRepository },
 ];

server/src/infra/repositories/media.repository.ts

@@ -1,4 +1,5 @@
 import { CropOptions, IMediaRepository, ResizeOptions, TranscodeOptions, VideoInfo } from '@app/domain';
+import { Logger } from '@nestjs/common';
 import ffmpeg, { FfprobeData } from 'fluent-ffmpeg';
 import fs from 'fs/promises';
 import sharp from 'sharp';
@@ -7,6 +8,8 @@ import { promisify } from 'util';
 const probe = promisify<string, FfprobeData>(ffmpeg.ffprobe);
 
 export class MediaRepository implements IMediaRepository {
+  private logger = new Logger(MediaRepository.name);
+
   crop(input: string, options: CropOptions): Promise<Buffer> {
     return sharp(input, { failOnError: false })
       .extract({
@@ -47,7 +50,10 @@ export class MediaRepository implements IMediaRepository {
           `-vf scale='min(${size},iw)':'min(${size},ih)':force_original_aspect_ratio=increase`,
         ])
         .output(output)
-        .on('error', reject)
+        .on('error', (err, stdout, stderr) => {
+          this.logger.error(stderr);
+          reject(err);
+        })
         .on('end', resolve)
         .run();
     });
@@ -87,7 +93,10 @@ export class MediaRepository implements IMediaRepository {
         ffmpeg(input, { niceness: 10 })
           .outputOptions(options.outputOptions)
           .output(output)
-          .on('error', reject)
+          .on('error', (err, stdout, stderr) => {
+            this.logger.error(stderr);
+            reject(err);
+          })
           .on('end', resolve)
           .run();
       });
@@ -102,7 +111,10 @@ export class MediaRepository implements IMediaRepository {
         .addOptions('-passlogfile', output)
         .addOptions('-f null')
         .output('/dev/null') // first pass output is not saved as only the .log file is needed
-        .on('error', reject)
+        .on('error', (err, stdout, stderr) => {
+          this.logger.error(stderr);
+          reject(err);
+        })
         .on('end', () => {
           // second pass
           ffmpeg(input, { niceness: 10 })
@@ -110,7 +122,10 @@ export class MediaRepository implements IMediaRepository {
             .addOptions('-pass', '2')
             .addOptions('-passlogfile', output)
             .output(output)
-            .on('error', reject)
+            .on('error', (err, stdout, stderr) => {
+              this.logger.error(stderr);
+              reject(err);
+            })
             .on('end', () => fs.unlink(`${output}-0.log`))
             .on('end', () => fs.rm(`${output}-0.log.mbtree`, { force: true }))
             .on('end', resolve)

server/src/microservices/app.service.ts

@@ -60,7 +60,7 @@ export class AppService {
       [JobName.SYSTEM_CONFIG_CHANGE]: () => this.systemConfigService.refreshConfig(),
       [JobName.QUEUE_GENERATE_THUMBNAILS]: (data) => this.mediaService.handleQueueGenerateThumbnails(data),
       [JobName.GENERATE_JPEG_THUMBNAIL]: (data) => this.mediaService.handleGenerateJpegThumbnail(data),
-      [JobName.GENERATE_WEBP_THUMBNAIL]: (data) => this.mediaService.handleGenerateWepbThumbnail(data),
+      [JobName.GENERATE_WEBP_THUMBNAIL]: (data) => this.mediaService.handleGenerateWebpThumbnail(data),
       [JobName.GENERATE_THUMBHASH_THUMBNAIL]: (data) => this.mediaService.handleGenerateThumbhashThumbnail(data),
       [JobName.QUEUE_VIDEO_CONVERSION]: (data) => this.mediaService.handleQueueVideoConversion(data),
       [JobName.VIDEO_CONVERSION]: (data) => this.mediaService.handleVideoConversion(data),

server/test/fixtures.ts

@@ -19,6 +19,7 @@ import {
   AssetEntity,
   AssetFaceEntity,
   AssetType,
+  AudioCodec,
   ExifEntity,
   PartnerEntity,
   PersonEntity,
@@ -27,9 +28,10 @@ import {
   SystemConfig,
   TagEntity,
   TagType,
-  TranscodePreset,
+  TranscodePolicy,
   UserEntity,
   UserTokenEntity,
+  VideoCodec,
 } from '@app/infra/entities';
 
 const today = new Date();
@@ -685,12 +687,12 @@ export const systemConfigStub = {
       crf: 23,
       threads: 0,
       preset: 'ultrafast',
-      targetAudioCodec: 'aac',
+      targetAudioCodec: AudioCodec.AAC,
       targetResolution: '720',
-      targetVideoCodec: 'h264',
+      targetVideoCodec: VideoCodec.H264,
       maxBitrate: '0',
       twoPass: false,
-      transcode: TranscodePreset.REQUIRED,
+      transcode: TranscodePolicy.REQUIRED,
     },
     job: {
       [QueueName.BACKGROUND_TASK]: { concurrency: 5 },

web/src/api/open-api/api.ts

@@ -746,6 +746,21 @@ export const AssetTypeEnum = {
 export type AssetTypeEnum = typeof AssetTypeEnum[keyof typeof AssetTypeEnum];
 
 
+/**
+ * 
+ * @export
+ * @enum {string}
+ */
+
+export const AudioCodec = {
+    Mp3: 'mp3',
+    Aac: 'aac',
+    Opus: 'opus'
+} as const;
+
+export type AudioCodec = typeof AudioCodec[keyof typeof AudioCodec];
+
+
 /**
  * 
  * @export
@@ -2411,24 +2426,30 @@ export interface SystemConfigFFmpegDto {
      * @memberof SystemConfigFFmpegDto
      */
     'threads': number;
+    /**
+     * 
+     * @type {VideoCodec}
+     * @memberof SystemConfigFFmpegDto
+     */
+    'targetVideoCodec': VideoCodec;
+    /**
+     * 
+     * @type {AudioCodec}
+     * @memberof SystemConfigFFmpegDto
+     */
+    'targetAudioCodec': AudioCodec;
+    /**
+     * 
+     * @type {TranscodePolicy}
+     * @memberof SystemConfigFFmpegDto
+     */
+    'transcode': TranscodePolicy;
     /**
      * 
      * @type {string}
      * @memberof SystemConfigFFmpegDto
      */
     'preset': string;
-    /**
-     * 
-     * @type {string}
-     * @memberof SystemConfigFFmpegDto
-     */
-    'targetVideoCodec': string;
-    /**
-     * 
-     * @type {string}
-     * @memberof SystemConfigFFmpegDto
-     */
-    'targetAudioCodec': string;
     /**
      * 
      * @type {string}
@@ -2447,22 +2468,8 @@ export interface SystemConfigFFmpegDto {
      * @memberof SystemConfigFFmpegDto
      */
     'twoPass': boolean;
-    /**
-     * 
-     * @type {string}
-     * @memberof SystemConfigFFmpegDto
-     */
-    'transcode': SystemConfigFFmpegDtoTranscodeEnum;
 }
 
-export const SystemConfigFFmpegDtoTranscodeEnum = {
-    All: 'all',
-    Optimal: 'optimal',
-    Required: 'required',
-    Disabled: 'disabled'
-} as const;
-
-export type SystemConfigFFmpegDtoTranscodeEnum = typeof SystemConfigFFmpegDtoTranscodeEnum[keyof typeof SystemConfigFFmpegDtoTranscodeEnum];
 
 /**
  * 
@@ -2749,6 +2756,22 @@ export const TimeGroupEnum = {
 export type TimeGroupEnum = typeof TimeGroupEnum[keyof typeof TimeGroupEnum];
 
 
+/**
+ * 
+ * @export
+ * @enum {string}
+ */
+
+export const TranscodePolicy = {
+    All: 'all',
+    Optimal: 'optimal',
+    Required: 'required',
+    Disabled: 'disabled'
+} as const;
+
+export type TranscodePolicy = typeof TranscodePolicy[keyof typeof TranscodePolicy];
+
+
 /**
  * 
  * @export
@@ -3027,6 +3050,21 @@ export interface ValidateAccessTokenResponseDto {
      */
     'authStatus': boolean;
 }
+/**
+ * 
+ * @export
+ * @enum {string}
+ */
+
+export const VideoCodec = {
+    H264: 'h264',
+    Hevc: 'hevc',
+    Vp9: 'vp9'
+} as const;
+
+export type VideoCodec = typeof VideoCodec[keyof typeof VideoCodec];
+
+
 
 /**
  * APIKeyApi - axios parameter creator

web/src/lib/components/admin-page/settings/ffmpeg/ffmpeg-settings.svelte

@@ -3,7 +3,7 @@
     notificationController,
     NotificationType,
   } from '$lib/components/shared-components/notification/notification';
-  import { api, SystemConfigFFmpegDto, SystemConfigFFmpegDtoTranscodeEnum } from '@api';
+  import { api, AudioCodec, SystemConfigFFmpegDto, TranscodePolicy, VideoCodec } from '@api';
   import SettingButtonsRow from '../setting-buttons-row.svelte';
   import SettingInputField, { SettingInputFieldType } from '../setting-input-field.svelte';
   import SettingSelect from '../setting-select.svelte';
@@ -113,9 +113,9 @@
             desc="Opus is the highest quality option, but has lower compatibility with old devices or software."
             bind:value={ffmpegConfig.targetAudioCodec}
             options={[
-              { value: 'aac', text: 'aac' },
+              { value: AudioCodec.Aac, text: 'aac' },
-              { value: 'mp3', text: 'mp3' },
+              { value: AudioCodec.Mp3, text: 'mp3' },
-              { value: 'opus', text: 'opus' },
+              { value: AudioCodec.Opus, text: 'opus' },
             ]}
             name="acodec"
             isEdited={!(ffmpegConfig.targetAudioCodec == savedConfig.targetAudioCodec)}
@@ -126,9 +126,9 @@
             desc="VP9 has high efficiency and web compatibility, but takes longer to transcode. HEVC performs similarly, but has lower web compatibility. H.264 is widely compatible and quick to transcode, but produces much larger files."
             bind:value={ffmpegConfig.targetVideoCodec}
             options={[
-              { value: 'h264', text: 'h264' },
+              { value: VideoCodec.H264, text: 'h264' },
-              { value: 'hevc', text: 'hevc' },
+              { value: VideoCodec.Hevc, text: 'hevc' },
-              { value: 'vp9', text: 'vp9' },
+              { value: VideoCodec.Vp9, text: 'vp9' },
             ]}
             name="vcodec"
             isEdited={!(ffmpegConfig.targetVideoCodec == savedConfig.targetVideoCodec)}
@@ -167,22 +167,22 @@
           />
 
           <SettingSelect
-            label="TRANSCODE"
+            label="TRANSCODE POLICY"
             desc="Policy for when a video should be transcoded."
             bind:value={ffmpegConfig.transcode}
             name="transcode"
             options={[
-              { value: SystemConfigFFmpegDtoTranscodeEnum.All, text: 'All videos' },
+              { value: TranscodePolicy.All, text: 'All videos' },
               {
-                value: SystemConfigFFmpegDtoTranscodeEnum.Optimal,
+                value: TranscodePolicy.Optimal,
                 text: 'Videos higher than target resolution or not in the desired format',
               },
               {
-                value: SystemConfigFFmpegDtoTranscodeEnum.Required,
+                value: TranscodePolicy.Required,
                 text: 'Only videos not in the desired format',
               },
               {
-                value: SystemConfigFFmpegDtoTranscodeEnum.Disabled,
+                value: TranscodePolicy.Disabled,
                 text: "Don't transcode any videos, may break playback on some clients",
               },
             ]}