feat(all): transcoding improvements (#2171)

* test: rename some fixtures and add text for vertical video conversion

* feat: transcode video asset when audio or container don't match target

* chore: add niceness to the ffmpeg command to allow other processes to be prioritised

* chore: change video conversion queue to one concurrency

* feat: add transcode disabled preset to completely turn off transcoding

* linter

* Change log level and remove unused await

* opps forgot to save

* better logging

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Co-authored-by: Alex Tran <alex.tran1502@gmail.com>

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

@@ -37,6 +37,7 @@ export enum TranscodePreset {
   ALL = 'all',
   OPTIMAL = 'optimal',
   REQUIRED = 'required',
+  DISABLED = 'disabled',
 }
 
 export interface SystemConfig {