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>

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>;