Implement remote runner jobs in server

Move ffmpeg functions to @shared

server/lib/transcoding/ended-transcoding.ts

@@ -0,0 +1,18 @@
+import { retryTransactionWrapper } from '@server/helpers/database-utils'
+import { VideoJobInfoModel } from '@server/models/video/video-job-info'
+import { MVideo } from '@server/types/models'
+import { moveToNextState } from '../video-state'
+
+export async function onTranscodingEnded (options: {
+  video: MVideo
+  isNewVideo: boolean
+  moveVideoToNextState: boolean
+}) {
+  const { video, isNewVideo, moveVideoToNextState } = options
+
+  await VideoJobInfoModel.decrease(video.uuid, 'pendingTranscode')
+
+  if (moveVideoToNextState) {
+    await retryTransactionWrapper(moveToNextState, { video, isNewVideo })
+  }
+}