cross-posted from: https://lemmy.pe1uca.dev/post/317214
I'm cross-posting it here to check if you guys know or if you have an idea which would be the best community to ask.
I'm trying to add the audio of a video to another one so I can have multiple tracks for my media service (Jellyfin).
The issue is the new track doesn't have any sound, it's just there with the proper metadata but it's just mute.
I tried playing it with Jellyfin and with VLC.
The original audio tracks play fine.This is my command.
ffmpeg -i .\3.english.mkv -i .\3.french.mp4 -c copy -map 0 -map 1:a:0 -y .\3.mix.mkv
I also already tried adding
-c:a:1 ac3
since this is the format of the audio in the mkv file.The data of the original audio of the mkv is
Stream #0:1(eng): Audio: ac3, 48000 Hz, 5.1(side), fltp, 384 kb/s Metadata: title : English BPS-eng : 384000 DURATION-eng : 02:21:42.176000000 NUMBER_OF_FRAMES-eng: 265693 NUMBER_OF_BYTES-eng: 408104448 _STATISTICS_WRITING_APP-eng: mkvmerge v25.0.0 ('Prog Noir') 64-bit _STATISTICS_WRITING_DATE_UTC-eng: 2018-07-23 09:18:58 _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
The data of the file I'm trying to inject from the mp4 is
Stream #0:1[0x2](fre): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 189 kb/s (default) Metadata: creation_time : 2014-04-17T18:14:55.000000Z handler_name : movie.track_2.aac vendor_id : [0][0][0][0]
do you guys have any idea of what might be the issue?
I also tried extracting the audio to a file and the aac file works fine, it's just when adding it to the mkv which doesn't work.
That's exactly what
1:a:0
does, from the first stream, from the audio streams, select the first stream.In this case since the audio is the second stream
1:a:0
is the same as1:1
I just tried it the other way, moving the audio from the mkv to the mp4 and it works properly.
Probably I can try to bundle the video of the mkv into an mp4 since Jellyfin is going to be doing it anyway when I try to stream to most devices.