Add video file metadata to download modal, via ffprobe (#2411)

* Add video file metadata via ffprobe

* Federate video file metadata

* Add tests for file metadata generation

* Complete tests for videoFile metadata federation

* Lint migration and video-file for metadata

* Objectify metadata from getter in ffmpeg-utils

* Add metadataUrl to all videoFiles

* Simplify metadata API middleware

* Load playlist in videoFile when requesting metadata

3 files changed, 32 insertions, 0 deletions

diff --git a/shared/models/activitypub/objects/common-objects.ts b/shared/models/activitypub/objects/common-objects.ts
index e94d05429..bb3ffe678 100644
--- a/shared/models/activitypub/objects/common-objects.ts
+++ b/shared/models/activitypub/objects/common-objects.ts
@@ -28,6 +28,15 @@ export type ActivityPlaylistSegmentHashesObject = {
   href: string
 }
 
+export type ActivityVideoFileMetadataObject = {
+  type: 'Link'
+  rel: [ 'metadata', any ]
+  mediaType: 'application/json'
+  height: number
+  href: string
+  fps: number
+}
+
 export type ActivityPlaylistInfohashesObject = {
   type: 'Infohash'
   name: string
@@ -80,6 +89,7 @@ export type ActivityTagObject =
   | ActivityMentionObject
   | ActivityBitTorrentUrlObject
   | ActivityMagnetUrlObject
+  | ActivityVideoFileMetadataObject
 
 export type ActivityUrlObject =
   ActivityVideoUrlObject
@@ -87,6 +97,7 @@ export type ActivityUrlObject =
   | ActivityBitTorrentUrlObject
   | ActivityMagnetUrlObject
   | ActivityHtmlUrlObject
+  | ActivityVideoFileMetadataObject
 
 export interface ActivityPubAttributedTo {
   type: 'Group' | 'Person'
diff --git a/shared/models/videos/video-file-metadata.ts b/shared/models/videos/video-file-metadata.ts
new file mode 100644
index 000000000..15683cacf
--- /dev/null
+++ b/shared/models/videos/video-file-metadata.ts
@@ -0,0 +1,18 @@
+import { FfprobeData } from "fluent-ffmpeg"
+import { DeepOmit } from "@server/models/utils"
+
+export type VideoFileMetadataModel = DeepOmit<FfprobeData, 'filename'>
+
+export class VideoFileMetadata implements VideoFileMetadataModel {
+  streams: { [x: string]: any, [x: number]: any }[]
+  format: { [x: string]: any, [x: number]: any }
+  chapters: any[]
+
+  constructor (hash: Partial<VideoFileMetadataModel>) {
+    this.chapters = hash.chapters
+    this.format = hash.format
+    this.streams = hash.streams
+
+    delete this.format.filename
+  }
+}
diff --git a/shared/models/videos/video-file.model.ts b/shared/models/videos/video-file.model.ts
index 04da0627e..6cc2d5aee 100644
--- a/shared/models/videos/video-file.model.ts
+++ b/shared/models/videos/video-file.model.ts
@@ -1,4 +1,5 @@
 import { VideoConstant, VideoResolution } from '@shared/models'
+import { FfprobeData } from 'fluent-ffmpeg'
 
 export interface VideoFile {
   magnetUri: string
@@ -9,4 +10,6 @@ export interface VideoFile {
   fileUrl: string
   fileDownloadUrl: string
   fps: number
+  metadata?: FfprobeData
+  metadataUrl?: string
 }