[FFmpeg-user] channelsplit seems to mute one channel

Carl Eugen Hoyos cehoyos at ag.or.at
Sat Apr 13 09:16:32 CEST 2013

Owen Jones <asorti6 <at> gmail.com> writes:

> I am trying to use the channelsplit filter to split 
> a single stereo channel into two separate channels.
> However when I look at the resulting file in 
> Quicktime (sorry don't know a better way to check 
> this with ffprobe)

The best way to test is:
ffmpeg -i test.mov -map 0:0 out1.wav
ffmpeg -i test.mov -map 0:1 out2.wav
and test the resulting wav files.

> the second (right) channel appears as disabled.

The reason is that FFmpeg only marks the first 
audio track as default. The reason is that 
users typically don't like if all languages 
are played simultaneously with QT;-)
(This was reported very often and only fixed 
It is not impossible to fix, but could you 
explain your use-case?

Carl Eugen

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