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.

1 files changed, 2 insertions, 0 deletions

diff --git a/server/controllers/api/config.ts b/server/controllers/api/config.ts
index 70e8aa970..8a00f9835 100644
--- a/server/controllers/api/config.ts
+++ b/server/controllers/api/config.ts
@@ -300,6 +300,7 @@ function customConfig (): CustomConfig {
       allowAudioFiles: CONFIG.TRANSCODING.ALLOW_AUDIO_FILES,
       threads: CONFIG.TRANSCODING.THREADS,
       resolutions: {
+        '0p': CONFIG.TRANSCODING.RESOLUTIONS[ '0p' ],
         '240p': CONFIG.TRANSCODING.RESOLUTIONS[ '240p' ],
         '360p': CONFIG.TRANSCODING.RESOLUTIONS[ '360p' ],
         '480p': CONFIG.TRANSCODING.RESOLUTIONS[ '480p' ],
@@ -356,6 +357,7 @@ function convertCustomConfigBody (body: CustomConfig) {
   function keyConverter (k: string) {
     // Transcoding resolutions exception
     if (/^\d{3,4}p$/.exec(k)) return k
+    if (/^0p$/.exec(k)) return k
 
     return snakeCase(k)
   }