Audio inserted has no sound

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.

View original on lemmy.pe1uca.dev

Comments3

quinkin

lemmy.world

What happens if you try with -map 1:a

pe1uca reply

lemmy.pe1uca.dev

It copies all the tracks from the mp4 and they get no sound.
The mkv has 3 tracks, the mp4 has 2, so the output has 5 tracks, the original 3 working and the added 2 without sound.

ulterno

programming.dev

I am not able to determine the problem from this, but since you managed to get the extracted aac to work, you can:

ffmpeg -i .\3.english.mkv -i .\3.french-audio.aac -c copy .\3.mix.mkv

and no need to use map over here as ffmpeg should just add all stuff by default.