Xvid Encode Playback problem

[mulderfox]

I use Media Player Classic to play movies, and usually it works like a charm.. but on a few occasions it happened that the frame rate drops to about 15 fps (instead 25 or 30) and the audio also slows down (pitch goes down too) - even though I got the right codecs installed, and the movie runs fine on windows media player (aside for the sound which is not mixed down to stereo so I only hear 2 channels from the surround mix)

Anyone has any idea why this happens?
I attached a gspot analysis screen that shows the stats on this xvid encode. and as it shows - I have all that's needed. yet this problem keep popping up

[Teegedeck]

Well, how fast is your CPU?

[mulderfox]

My Hardware:
Athlon XP 1700+
MSI K7N420 Pro (Nforce1 based)
ATI Radeon 9500 Pro (Bios modded to 9700Pro)
512MB DDR RAM
120GB Western Digital 8MB Buffer ATA HD

that's about it..

[DigitalDeviant]

I had a similar problem (though I didn't have the audio pitch change) and disabling the internal AC3 filters in MPC and using AC3Filter 0.70b fixed it.

[mulderfox]

Well first thing, thanks!
It helped.
The sound now's okay. however, the framerate is still unstable. There's a Jitter of 4 ms, and a sync offset of 8 ms. and it's changing through the movie.

Any more ideas? thanks again! :)

[DigitalDeviant]

You could try disabling the other MPC filters that relate to your video like the AVI Splitter. You might also try changing the decoder used, ie if your usin XviD to decode it try the latest ffdshow or vice versa.

[unmei]

if you use VMR9 or 7 you could try using the overlay mixer or another VMR mode ("o"->playback->output:direct show video).
My althon XP @2GHz is still not able to play video really fluently with VMR9 (both windowed or renderless). IMO overlay mixer still looks the best and has the least problems with framerate (or then it hides better if it cannot keep up :))

[mulderfox]

thank you!! although I cannot see the frame rate now, it seems much better :> (after reopening the file once or twice)