[FFmpeg-user] MP4 h264 video: convert left/right audio channels to seperate audio tracks

[Tim Nicholson]

On 07/02/12 22:36, Trépanier,Jason wrote:
> I have several terabytes of videos in MP4 h264 and unfortunately they are encoded in a strange way.
>
>
>
> Example:
>
> Video track
>
> Audio track 1: Left channel is English
>
> Audio track 1: Right channel is French
>
> Audio track 2: Left channel is Spanish
>
> Audio track 2: Right channel is empty
>
>
>
> Would it be possible by some miracle to extract the left/right channels and convert them to Separate tracks?
>
>
>
> Example:
>
> Video track
>
> Audio track 1: left/right English
>
> Audio track 2: left/right French
>
> Audio track 3: left/right Spanish
>

It is possible, yes. However without knowing the exact current 
stream/channel layout as reported by ffprobe it is difficult to provide 
more detail.

See. http://ffmpeg.org/ffmpeg.html#amerge


-- 
Tim


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