[MPlayer-users] Inaccurate cuts with -ss

[Emil Mikulic]

On Fri, Jun 18, 2010 at 5:59 PM, Oliver Seitz <info at vtnd.de> wrote:
> I would play the source to single jpeg files (mplayer $src -vo jpeg), do
> the transformations on the jpegs (e.g. via graphicsmagick), and then use
> mencoder to combine the jpegs back to a video file.

Thanks for the suggestion! I just tried this and I'm seeing some
serious weirdness with -vo jpeg:

$ rm *.jpg
$ mplayer -vo jpeg ../input.avi -endpos 10
[snip]
VIDEO:  [FMP4]  720x384  24bpp  29.970 fps  1438.3 kbps (175.6 kbyte/s)
A:  10.0 V:  10.0 A-V:  0.000 ct: -0.000 301/301  5% 48%  0.6% 0 0
$ ls *.jpg | wc -l
244

So ten seconds at 29.97fps results in 301 frames played but only 244
saved to disk?  What am I missing here?