Fix adding an intro/outro with splitted HLS

packages/ffmpeg/src/ffmpeg-edition.ts

@@ -127,7 +127,8 @@ export class FFmpegEdition {
     const mainProbe = await ffprobePromise(videoInputPath)
     const fps = await getVideoStreamFPS(videoInputPath, mainProbe)
     const { resolution } = await getVideoStreamDimensionsInfo(videoInputPath, mainProbe)
-    const mainHasAudio = await hasAudioStream(separatedAudioInputPath || videoInputPath, mainProbe)
+
+    const mainHasAudio = await hasAudioStream(separatedAudioInputPath || videoInputPath)
 
     const introOutroProbe = await ffprobePromise(introOutroPath)
     const introOutroHasAudio = await hasAudioStream(introOutroPath, introOutroProbe)
@@ -135,12 +136,23 @@ export class FFmpegEdition {
     const command = this.commandWrapper.buildCommand([ ...this.buildInputs(options), introOutroPath ], inputFileMutexReleaser)
       .output(outputPath)
 
+    const videoInput = 0
+
+    const audioInput = separatedAudioInputPath
+      ? videoInput + 1
+      : videoInput
+
+    const introInput = audioInput + 1
+    let introAudio = introInput
+
     if (!introOutroHasAudio && mainHasAudio) {
       const duration = await getVideoStreamDuration(introOutroPath, introOutroProbe)
 
       command.input('anullsrc')
       command.withInputFormat('lavfi')
       command.withInputOption('-t ' + duration)
+
+      introAudio++
     }
 
     await presetVOD({
@@ -159,7 +171,7 @@ export class FFmpegEdition {
     // Add black background to correctly scale intro/outro with padding
     const complexFilter: FilterSpecification[] = [
       {
-        inputs: [ '1', '0' ],
+        inputs: [ `${introInput}`, `${videoInput}` ],
         filter: 'scale2ref',
         options: {
           w: 'iw',
@@ -185,7 +197,7 @@ export class FFmpegEdition {
         outputs: [ 'to-scale-bg' ]
       },
       {
-        inputs: [ '1', 'to-scale-bg' ],
+        inputs: [ `${introInput}`, 'to-scale-bg' ],
         filter: 'scale2ref',
         options: {
           w: 'iw',
@@ -221,14 +233,9 @@ export class FFmpegEdition {
     const mainFilterInputs = [ 'main' ]
 
     if (mainHasAudio) {
-      mainFilterInputs.push('0:a')
+      mainFilterInputs.push(`${audioInput}:a`)
 
-      if (introOutroHasAudio) {
-        introOutroFilterInputs.push('1:a')
-      } else {
-        // Silent input
-        introOutroFilterInputs.push('2:a')
-      }
+      introOutroFilterInputs.push(`${introAudio}:a`)
     }
 
     if (type === 'intro') {

packages/tests/src/api/transcoding/video-studio.ts

@@ -1,4 +1,3 @@
-import { expect } from 'chai'
 import { getAllFiles, getHLS } from '@peertube/peertube-core-utils'
 import { VideoStudioTask } from '@peertube/peertube-models'
 import { areMockObjectStorageTestsDisabled } from '@peertube/peertube-node-utils'
@@ -16,6 +15,7 @@ import {
 import { checkVideoDuration, expectStartWith } from '@tests/shared/checks.js'
 import { checkPersistentTmpIsEmpty } from '@tests/shared/directories.js'
 import { completeCheckHlsPlaylist } from '@tests/shared/streaming-playlists.js'
+import { expect } from 'chai'
 
 describe('Test video studio', function () {
   let servers: PeerTubeServer[] = []
@@ -48,6 +48,7 @@ describe('Test video studio', function () {
     await servers[0].config.enableStudio()
   })
 
+  function runCommonTests () {
     describe('Cutting', function () {
 
       it('Should cut the beginning of the video', async function () {
@@ -247,7 +248,7 @@ describe('Test video studio', function () {
         }
       })
 
-    it('Should add an outro without audio to a video with audio', async function () {
+      it('Should add an outro without audio to a video without audio', async function () {
         this.timeout(120_000)
         await renewVideo('video_short_no_audio.mp4')
 
@@ -294,8 +295,11 @@ describe('Test video studio', function () {
         }
       })
     })
+  }
 
-  describe('Complex tasks', function () {
+  describe('Web videos enabled', function () {
+
+    runCommonTests()
 
     it('Should run a complex task', async function () {
       this.timeout(240_000)
@@ -315,7 +319,9 @@ describe('Test video studio', function () {
       await servers[0].config.enableMinimumTranscoding({ webVideo: false, hls: true })
     })
 
-    it('Should run a complex task on HLS only video', async function () {
+    runCommonTests()
+
+    it('Should run a complex task', async function () {
       this.timeout(240_000)
       await renewVideo()
 
@@ -338,7 +344,9 @@ describe('Test video studio', function () {
       await servers[0].config.enableMinimumTranscoding({ webVideo: false, hls: true, splitAudioAndVideo: true })
     })
 
-    it('Should run a complex task on HLS only video', async function () {
+    runCommonTests()
+
+    it('Should run a complex task', async function () {
       this.timeout(240_000)
       await renewVideo()