Add audio-only option to transcoders and player

This patch adds an audio-only option to PeerTube by means of a new transcoding configuration which creates mp4 files which only contain an audio stream. This new transcoder has a resolution of '0' and is presented in the preferences and in the player resolution menu as 'Audio-only' (localised). When playing such streams the player shows the file thumbnail as background and disables controls autohide.

Audio-only files can be shared and streamed just like any other file. They can be downloaded as well, the resulting file will be an mp4 container with a single audio stream.

This patch is a proof of concept to show the feasibility of 'true' audio-only support. There are better ways of doing this which also enable multiple audio streams for a given video stream (e.g. DASH) but as this would entail a fundamental change in the way PeerTube works it is a bridge too far for a simple proof of concept.

2 files changed, 2 insertions, 0 deletions

diff --git a/server/tests/api/check-params/config.ts b/server/tests/api/check-params/config.ts
index 3c558d4ea..443fbcb60 100644
--- a/server/tests/api/check-params/config.ts
+++ b/server/tests/api/check-params/config.ts
@@ -85,6 +85,7 @@ describe('Test config API validators', function () {
       allowAudioFiles: true,
       threads: 1,
       resolutions: {
+        '0p': false,
         '240p': false,
         '360p': true,
         '480p': true,
diff --git a/server/tests/api/server/config.ts b/server/tests/api/server/config.ts
index a494858b3..cf99e5c0a 100644
--- a/server/tests/api/server/config.ts
+++ b/server/tests/api/server/config.ts
@@ -274,6 +274,7 @@ describe('Test config', function () {
         allowAudioFiles: true,
         threads: 1,
         resolutions: {
+          '0p': false,
           '240p': false,
           '360p': true,
           '480p': true,