[MEncoder-users] mencoder: mp2->mp4 autoaspect question

[Carl Eugen Hoyos]

Toerless Eckert <Toerless.Eckert <at> Informatik.Uni-Erlangen.de> writes:

>    -vc mpeg12 -ovc lavc -lavcopts vcodec=mpeg4:v4mv:autoaspect:... 
> 
> This works only to a degree: the mpeg4 file seems to get the aspect
> ratio that the mpeg2 input file has at the beginning (16:9 or 4:3),
> but when the aspect ratio changes within the input mpeg2 file, then
> this does not correctly gets translated into the mpeg4 file.

> Is this supposed to work with mencoder ?

I can only tell you that it works fine with ffmpeg (just tested).

> If not, how difficult would it to add this to mencoder ?

Please note that mencoder is not actively maintained and that you should use
ffmpeg for most transcoding.

Carl Eugen