6 files changed, 35 insertions, 19 deletions

diff --git a/server/server/controllers/feeds/video-feeds.ts b/server/server/controllers/feeds/video-feeds.ts
index fc0e6e0f7..679d73fff 100644
--- a/server/server/controllers/feeds/video-feeds.ts
+++ b/server/server/controllers/feeds/video-feeds.ts
@@ -3,9 +3,9 @@ import { extname } from 'path'
 import { Feed } from '@peertube/feed'
 import { cacheRouteFactory } from '@server/middlewares/index.js'
 import { VideoModel } from '@server/models/video/video.js'
-import { VideoInclude } from '@peertube/peertube-models'
+import { VideoInclude, VideoResolution } from '@peertube/peertube-models'
 import { buildNSFWFilter } from '../../helpers/express-utils.js'
-import { MIMETYPES, ROUTE_CACHE_LIFETIME, WEBSERVER } from '../../initializers/constants.js'
+import { ROUTE_CACHE_LIFETIME, WEBSERVER } from '../../initializers/constants.js'
 import {
   asyncMiddleware,
   commonVideosFiltersValidator,
@@ -17,6 +17,7 @@ import {
   videoSubscriptionFeedsValidator
 } from '../../middlewares/index.js'
 import { buildFeedMetadata, getCommonVideoFeedAttributes, getVideosForFeeds, initFeed, sendFeed } from './shared/index.js'
+import { getVideoFileMimeType } from '@server/lib/video-file.js'
 
 const videoFeedsRouter = express.Router()
 
@@ -137,7 +138,7 @@ function addVideosToFeed (feed: Feed, videos: VideoModel[]) {
 
     const videoFiles = formattedVideoFiles.map(videoFile => {
       return {
-        type: MIMETYPES.VIDEO.EXT_MIMETYPE[extname(videoFile.fileUrl)],
+        type: getVideoFileMimeType(extname(videoFile.fileUrl), videoFile.resolution.id === VideoResolution.H_NOVIDEO),
         medium: 'video',
         height: videoFile.resolution.id,
         fileSize: videoFile.size,
diff --git a/server/server/controllers/feeds/video-podcast-feeds.ts b/server/server/controllers/feeds/video-podcast-feeds.ts
index 84d5acadd..ad694affa 100644
--- a/server/server/controllers/feeds/video-podcast-feeds.ts
+++ b/server/server/controllers/feeds/video-podcast-feeds.ts
@@ -15,6 +15,7 @@ import { asyncMiddleware, setFeedPodcastContentType, videoFeedsPodcastValidator
 import { VideoModel } from '../../models/video/video.js'
 import { VideoCaptionModel } from '../../models/video/video-caption.js'
 import { buildFeedMetadata, getCommonVideoFeedAttributes, getVideosForFeeds, initFeed } from './shared/index.js'
+import { getVideoFileMimeType } from '@server/lib/video-file.js'
 
 const videoPodcastFeedsRouter = express.Router()
 
@@ -243,11 +244,6 @@ async function addLivePodcastItem (options: {
 // ---------------------------------------------------------------------------
 
 function buildVODWebVideoFile (video: MVideo, videoFile: VideoFile) {
-  const isAudio = videoFile.resolution.id === VideoResolution.H_NOVIDEO
-  const type = isAudio
-    ? MIMETYPES.AUDIO.EXT_MIMETYPE[extname(videoFile.fileUrl)]
-    : MIMETYPES.VIDEO.EXT_MIMETYPE[extname(videoFile.fileUrl)]
-
   const sources = [
     { uri: videoFile.fileUrl },
     { uri: videoFile.torrentUrl, contentType: 'application/x-bittorrent' }
@@ -258,7 +254,7 @@ function buildVODWebVideoFile (video: MVideo, videoFile: VideoFile) {
   }
 
   return {
-    type,
+    type: getVideoFileMimeType(extname(videoFile.fileUrl), videoFile.resolution.id === VideoResolution.H_NOVIDEO),
     title: videoFile.resolution.label,
     length: videoFile.size,
     bitrate: videoFile.size / video.duration * 8,
diff --git a/server/server/initializers/constants.ts b/server/server/initializers/constants.ts
index 38322aece..121433caf 100644
--- a/server/server/initializers/constants.ts
+++ b/server/server/initializers/constants.ts
@@ -630,9 +630,10 @@ const MIMETYPES = {
       'audio/vnd.dlna.adts': '.aac',
       'audio/aac': '.aac',
 
+      // Keep priority for preferred mime type
       'audio/m4a': '.m4a',
-      'audio/mp4': '.m4a',
       'audio/x-m4a': '.m4a',
+      'audio/mp4': '.m4a',
 
       'audio/vnd.dolby.dd-raw': '.ac3',
       'audio/ac3': '.ac3'
diff --git a/server/server/lib/video-file.ts b/server/server/lib/video-file.ts
index 9d8a6e8fc..ccc5668a2 100644
--- a/server/server/lib/video-file.ts
+++ b/server/server/lib/video-file.ts
@@ -8,6 +8,7 @@ import { ffprobePromise, getVideoStreamDimensionsInfo, getVideoStreamFPS, isAudi
 import { lTags } from './object-storage/shared/index.js'
 import { generateHLSVideoFilename, generateWebVideoFilename } from './paths.js'
 import { VideoPathManager } from './video-path-manager.js'
+import { MIMETYPES } from '@server/initializers/constants.js'
 
 async function buildNewFile (options: {
   path: string
@@ -130,6 +131,12 @@ async function buildFileMetadata (path: string, existingProbe?: FfprobeData) {
   return new VideoFileMetadata(metadata)
 }
 
+function getVideoFileMimeType (extname: string, isAudio: boolean) {
+  return isAudio && extname === '.mp4' // We use .mp4 even for audio file only
+    ? MIMETYPES.AUDIO.EXT_MIMETYPE['.m4a']
+    : MIMETYPES.VIDEO.EXT_MIMETYPE[extname]
+}
+
 // ---------------------------------------------------------------------------
 
 export {
@@ -140,5 +147,6 @@ export {
   removeAllWebVideoFiles,
   removeWebVideoFile,
 
-  buildFileMetadata
+  buildFileMetadata,
+  getVideoFileMimeType
 }
diff --git a/server/server/models/redundancy/video-redundancy.ts b/server/server/models/redundancy/video-redundancy.ts
index 26089594d..3a5e7bf33 100644
--- a/server/server/models/redundancy/video-redundancy.ts
+++ b/server/server/models/redundancy/video-redundancy.ts
@@ -15,6 +15,7 @@ import {
   UpdatedAt
 } from 'sequelize-typescript'
 import {
+  ActivityVideoUrlObject,
   CacheFileObject,
   FileRedundancyInformation,
   StreamingPlaylistRedundancyInformation,
@@ -31,7 +32,7 @@ import { MActor, MVideoForRedundancyAPI, MVideoRedundancy, MVideoRedundancyAP, M
 import { isActivityPubUrlValid, isUrlValid } from '../../helpers/custom-validators/activitypub/misc.js'
 import { logger } from '../../helpers/logger.js'
 import { CONFIG } from '../../initializers/config.js'
-import { CONSTRAINTS_FIELDS, MIMETYPES } from '../../initializers/constants.js'
+import { CONSTRAINTS_FIELDS } from '../../initializers/constants.js'
 import { ActorModel } from '../actor/actor.js'
 import { ServerModel } from '../server/server.js'
 import { getSort, getVideoSort, parseAggregateResult, throwIfNotValid } from '../shared/index.js'
@@ -40,6 +41,7 @@ import { VideoChannelModel } from '../video/video-channel.js'
 import { VideoFileModel } from '../video/video-file.js'
 import { VideoStreamingPlaylistModel } from '../video/video-streaming-playlist.js'
 import { VideoModel } from '../video/video.js'
+import { getVideoFileMimeType } from '@server/lib/video-file.js'
 
 export enum ScopeNames {
   WITH_VIDEO = 'WITH_VIDEO'
@@ -733,15 +735,19 @@ export class VideoRedundancyModel extends Model<Partial<AttributesOnly<VideoRedu
       id: this.url,
       type: 'CacheFile' as 'CacheFile',
       object: this.VideoFile.Video.url,
-      expires: this.expiresOn ? this.expiresOn.toISOString() : null,
+
+      expires: this.expiresOn
+        ? this.expiresOn.toISOString()
+        : null,
+
       url: {
         type: 'Link',
-        mediaType: MIMETYPES.VIDEO.EXT_MIMETYPE[this.VideoFile.extname] as any,
+        mediaType: getVideoFileMimeType(this.VideoFile.extname, this.VideoFile.isAudio()),
         href: this.fileUrl,
         height: this.VideoFile.resolution,
         size: this.VideoFile.size,
         fps: this.VideoFile.fps
-      }
+      } as ActivityVideoUrlObject
     }
   }
 
diff --git a/server/server/models/video/formatter/video-activity-pub-format.ts b/server/server/models/video/formatter/video-activity-pub-format.ts
index d19bb1880..7beec741a 100644
--- a/server/server/models/video/formatter/video-activity-pub-format.ts
+++ b/server/server/models/video/formatter/video-activity-pub-format.ts
@@ -9,9 +9,10 @@ import {
   ActivityTagObject,
   ActivityTrackerUrlObject,
   ActivityUrlObject,
+  ActivityVideoUrlObject,
   VideoObject
 } from '@peertube/peertube-models'
-import { MIMETYPES, WEBSERVER } from '../../../initializers/constants.js'
+import { WEBSERVER } from '../../../initializers/constants.js'
 import {
   getLocalVideoChaptersActivityPubUrl,
   getLocalVideoCommentsActivityPubUrl,
@@ -23,6 +24,7 @@ import { MStreamingPlaylistFiles, MUserId, MVideo, MVideoAP, MVideoFile } from '
 import { VideoCaptionModel } from '../video-caption.js'
 import { sortByResolutionDesc } from './shared/index.js'
 import { getCategoryLabel, getLanguageLabel, getLicenceLabel } from './video-api-format.js'
+import { getVideoFileMimeType } from '@server/lib/video-file.js'
 
 export function videoModelToActivityPubObject (video: MVideoAP): VideoObject {
   const language = video.language
@@ -179,18 +181,20 @@ function buildVideoFileUrls (options: {
     .sort(sortByResolutionDesc)
 
   for (const file of sortedFiles) {
+    const mimeType = getVideoFileMimeType(file.extname, file.isAudio())
+
     urls.push({
       type: 'Link',
-      mediaType: MIMETYPES.VIDEO.EXT_MIMETYPE[file.extname] as any,
+      mediaType: mimeType,
       href: file.getFileUrl(video),
       height: file.resolution,
       size: file.size,
       fps: file.fps
-    })
+    } as ActivityVideoUrlObject)
 
     urls.push({
       type: 'Link',
-      rel: [ 'metadata', MIMETYPES.VIDEO.EXT_MIMETYPE[file.extname] ],
+      rel: [ 'metadata', mimeType ],
       mediaType: 'application/json' as 'application/json',
       href: getLocalVideoFileMetadataUrl(video, file),
       height: file.resolution,