[MEncoder-users] manipulating audio channels on a VOB file

[Grozdan]

On Wed, Jan 11, 2012 at 6:28 PM, Davide Dozza <ddozza at gmail.com> wrote:
> Hi all,
>
> I've a self-produced DVD with a video and a stereo audio stream.
>
> On the stereo audio stream I would like to overwrite the right audio
> channel with the left one.
>
> By playing a vob file in this way
>
> mplayer VTS_01_2.VOB -af channels=2:2:0:1:0:0
>
> the result is perfect.
> But when I try to use mencoder in this way
>
> mencoder VTS_01_2.VOB -ovc copy -oac copy -af channels=2:2:0:1:0:0 -o
> pippo.vob

Audio filters do not work when you copy the stream. The same goes for
video filters which do not work when you copy the video stream. This
is for obvious reasons. Copying implies no manipulation of the
original stream (or else it won't be called 'copy')

>
> it doesn't produce what I expect.
>
> Any suggestion about?
>
> Davide
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