Implement remote runner jobs in server

Move ffmpeg functions to @shared

server/lib/transcoding/shared/job-builders/abstract-job-builder.ts

@@ -0,0 +1,38 @@
+
+import { JOB_PRIORITY } from '@server/initializers/constants'
+import { VideoModel } from '@server/models/video/video'
+import { MUserId, MVideoFile, MVideoFullLight } from '@server/types/models'
+
+export abstract class AbstractJobBuilder {
+
+  abstract createOptimizeOrMergeAudioJobs (options: {
+    video: MVideoFullLight
+    videoFile: MVideoFile
+    isNewVideo: boolean
+    user: MUserId
+  }): Promise<any>
+
+  abstract createTranscodingJobs (options: {
+    transcodingType: 'hls' | 'webtorrent'
+    video: MVideoFullLight
+    resolutions: number[]
+    isNewVideo: boolean
+    user: MUserId | null
+  }): Promise<any>
+
+  protected async getTranscodingJobPriority (options: {
+    user: MUserId
+    fallback: number
+  }) {
+    const { user, fallback } = options
+
+    if (!user) return fallback
+
+    const now = new Date()
+    const lastWeek = new Date(now.getFullYear(), now.getMonth(), now.getDate() - 7)
+
+    const videoUploadedByUser = await VideoModel.countVideosUploadedByUserSince(user.id, lastWeek)
+
+    return JOB_PRIORITY.TRANSCODING + videoUploadedByUser
+  }
+}