[FFmpeg-user] Aspect ratio preservation in WMV

Rodney Baker rodney.baker at iinet.net.au
Sat Sep 24 04:17:11 CEST 2011

On Sat, 24 Sep 2011 04:50:52 Paul-Antoine Arras wrote:
> Hello,
> I'm trying to convert the sound of a video from WMA to MP3. To do so, I
> use the following command line:
>     ffmpeg -i input.wmv -acodec libmp3lame -aq 4 -vcodec copy output.wmv
> The sound is converted correctly but the aspect ratio (AR) becomes 4:3
> instead of 16:9. Then I've tried to force the AR with:
>     -aspect 16:9
> without success.
> Why does ffmpeg modify the AR while all it has to do in this case is a
> simple copy of the video part? How to make it preserve the original AR
> (16:9)?
> Thanks in advance for your help.

You need to provide the full output from ffmpeg.

Rodney Baker VK5ZTV
rodney.baker at iinet.net.au

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