Audio problems

[oeriksen]

I ripped a DVD to DivX a while ago. I used FlaskMPEG with Microsoft's MPEG4 codec and MP3 sound. When I played it, I got a sound problem. After playing for some minutes, the sound is getting out of sync. If I move back some seconds and continue, the problem is gone. But after some minutes the sound is out of sync again. This continues all the time. I got problems with audio out of sync before, but that was for the whole movie (nothing at first, but several seconds at the end).

Anyone had this problem or knows what causing it?

Thanks in advance.

[UncasMS]

your pc is not fast enough to keep up with the synching!

reduce the postfilter quality of the codec in use.

how many cd's does the rip have and what are your system specs?

[oeriksen]

You mean my computer isn't fast enough for encoding? What is my computer specs? Back then I had a Duron 750 Mhz, 256 Mb ram, 25 GB ATA100 drive, Riva TNT Graphic card.

Now I got AMD T-bird 1,4 Ghz, 512 MB ram, 65 GB drives, GeForce2 card.

As I said I used flaskMPEG with MS MPEG4 codec and 128 kbps MP3 sound. I don't remember what settings I used on the MPEG4 codec or on flaskMPEG, sorry.

I ripped the whole season one of X-files. From DVD. Every episode had the problem I said. Not just me, but several others too.

[omarh]

If you encode the sound using flask then you'll probably get sync errors no matter how fast your computer is.

If you encode the sound separately using graphedit or vob2dec or something like that, then mux them together using virtual dub, you won't get sync errors on your Athlon. I don't get them anymore since going to that approach after getting some advice from Uncas.

And I'm sure Uncas was talking about your computer not being fast enough for PLAYBACK not encoding....you can encode properly with a 200mhz machine if you wanted to...for encoding purposes the speed of the computer is totally irrelevant. except of course it might take years to encode a movie !

When you have a slower CPU, you have to turn down post processing and any other background apps because any CPU hiccups and you'll lose sync...
I would like to point out that, my tests show that if you use PCM audio you won't have sync problems even on a slower computer like a 450 mhz machine....but then your divx file is huge!

[oeriksen]

Thank you for your answer. I'll keep that in mind next time I'll encode a movie or tv-show. Thought I could take the easy way out, you know, by only using one program. Guess I was really wrong there.

But with some other movies, I didn't have any problem at all.

Thanks again!
Next time the movie / tv-show will be perfect!