[MPlayer-users] Inconsistent playback speed

[Reimar Döffinger]

On Tue, Jun 17, 2008 at 11:38:03PM +1200, David Middleton wrote:
> Hi 
> 
> I am getting inconsistent results when using mplayer to view some videos
> at high speeds (4x to 8x).  For example, playing a 30 minute video at 4x
> speed can take 16 minutes:
> 
> $ time ../mplayer.exe -speed 4 V0329001x2.AVI
> MPlayer 1.0rc2-3.4.5 (C) 2000-2007 MPlayer Team

Your MPlayer version is too old, that version does not use
high-resolution timers on Windows, but the default once that are limited
to 10 ms max. Unless you have some other application running that
changes this value, anything even close to 100 fps will be very
unreliable.

> VIDEO:  [FMP4]  640x544  24bpp  34.000 fps  1579.4 kbps (192.8 kbyte/s)

In addition, playing at 4x results 136 fps, which probably is more than
the refresh rate which means
1) The people writing your display drivers might never even have tested
this case, so anything can happen ;-)
2) it is a waste of resources.
Try using the framestep filter.

Greetings,
Reimar Döffinger