why when i merge/split video's audio lost #1844

bluelovers opened this Issue Dec 31, 2016 · 5 comments


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I use OBS for record video (audio setting is mp3)

but when i use mkvtoolnix to merge or split it
the audio will lost

but when i use aac for audio setting than can work well

does mkvtoolnix not support video's mp3 audio?

mbunkus commented Dec 31, 2016

mkvmerge supports MP3 just fine. It's likely something about your source file that mkvmerge doesn't handle yet. If you want me to look into it, then I need access to such a source file. Please upload it somewhere, e.g. to my FTP server.

bluelovers commented Jan 1, 2017 edited


when we play this file it have audio

when we merge/split than not

mbunkus commented Jan 1, 2017

Thanks. I'll look into it.

@mbunkus mbunkus added a commit that closed this issue Jan 1, 2017
@mbunkus MP4: determine track parameters from bitstream for MP2 audio, too
In this case the track contains MP3 data. However, the ESDS's object
type ID field is set to 0x6b in the headers indicating MP2. Additionally
the track's fields for channels & sampling frequency are set to 0.

Fixes #1844.
@mbunkus mbunkus closed this in 5f096de Jan 1, 2017
mbunkus commented Jan 1, 2017

New pre-builds for Windows including the fix are available.


lol thx

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