Fix transcoding resolutions when audio is enabled

packages/tests/src/api/transcoding/transcoder-limits.ts

@@ -290,6 +290,23 @@ describe('Test video transcoding limits', function () {
       expect(video.files[0].resolution.id).to.equal(720)
       expect(hlsFiles[0].resolution.id).to.equal(720)
     })
+
+    it('Should keep input resolution if only upper resolutions are enabled', async function () {
+      this.timeout(120_000)
+
+      await servers[0].config.enableTranscoding({ resolutions: [ 0, 1080 ], keepOriginal: false })
+
+      const { uuid } = await servers[0].videos.quickUpload({ name: 'video', fixture: 'video_short.webm' })
+      await waitJobs(servers)
+
+      const video = await servers[0].videos.get({ id: uuid })
+      const hlsFiles = video.streamingPlaylists[0].files
+
+      expect(video.files).to.have.lengthOf(2)
+      expect(hlsFiles).to.have.lengthOf(2)
+
+      expect(getAllFiles(video).map(f => f.resolution.id)).to.have.members([ 720, 720, 0, 0 ])
+    })
   })
 
   after(async function () {

server/core/lib/transcoding/transcoding-resolutions.ts

@@ -16,7 +16,10 @@ export function buildOriginalFileResolution (inputResolution: number) {
     hasAudio: true
   })
 
-  if (resolutions.length === 0) {
+  if (
+    resolutions.length === 0 ||
+    (resolutions.length === 1 && resolutions[0] === VideoResolution.H_NOVIDEO)
+  ) {
     return toEven(inputResolution)
   }
 
@@ -58,7 +61,7 @@ export function computeResolutionsToTranscode (options: {
     if (input < resolution) continue
     // We only want lower resolutions than input file
     if (strictLower && input === resolution) continue
-    // Audio resolutio but no audio in the video
+    // Audio resolution but no audio in the video
     if (resolution === VideoResolution.H_NOVIDEO && !hasAudio) continue
 
     resolutionsEnabled.add(resolution)