[FFmpeg-user] channelsplit seems to mute one channel

Paul B Mahol onemda at gmail.com
Tue Apr 16 10:53:00 CEST 2013

On 4/16/13, Owen Jones <asorti6 at gmail.com> wrote:
> On 13 Apr 2013, at 08:16, Carl Eugen Hoyos <cehoyos at ag.or.at> wrote:
>> 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
>> recently.)
>> It is not impossible to fix, but could you
>> explain your use-case?
> Is there any possibility of a fix or a way around this? I've also tried
> looking into the metadata to see if I can re-enable the second channel but
> can't see how to do that either. The only fix I can see right now is to
> post-process every output file with quicktime but this will be rather
> painful.
> If ffmpeg is making a decision to disable a channel without an override
> option that feels rather like like a bug or at least a missing feature? I
> guess I could have a go at trying to write the code for a new filter/option
> myself although I think it might take me a while to get up to speed on how
> to do this...

I think you are confused a little. You have file where each single channel is
in its own separate stream. There is no point in writing filter for this.
Just read and follow documentation how to pick annother audio stream
and not default one.

> Regards
> Owen
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