[FFmpeg-user] Convert some hundreds files to a H264

[Mark Blain]

Stefano Sabatini <stefano.sabatini-lala at poste.it> wrote:
>
>You can rely on expression evaluation (recently added):
>
>-vf "scale=720:trunc(ow/a/vsub)*vsub"
>
>ow/a is the scaled height, in this case you get the final height an
>integer multiple of the chroma vertical subsampling value. Many
>variations are possible.

Thanks!  I read some development discussion about that, but I didn't know
it was in the trunk yet.  The details are in
http://www.ffmpeg.org/libavfilter.html#SEC37