[MEncoder-users] Why does FFMPEG encode without sync problem but Mencoder cannot?

[Reimar Döffinger]

On Thu, Jul 10, 2008 at 12:55:23PM -0400, David Smith wrote:
> THAT SAID, if I run mencoder with the -vf harddup switch my audio/video sync
> are fine, but it takes much, much longer to encode (like 7x's as long), and
> the file size is almost 2/3's larger.  I'm sure it's because it's encoding
> the duplicate frames, but why would this be?

Because wmv is variable framerate, so MPlayer will treat it as 1000fps.
Use harddup _and_ specify the desired frame rate with -ofps.
If you want a variable frame-rate flv, your only option is to use FFmpeg
though.

> How come FFMPEG
> can sync without a harddup type option?

Because FFmpeg always uses "harddup".