DVD2SVCD doesn't obey size limit for a DVD?

[merlin9876]

Hi!
I'm using DVD2SVCD to put some DivX/XVid movies on DVD to watch on the good ol' TV. The thing is, I've had to put a smaller value for the final file size in the Bitrate tab since when I put the the video and audio file (mp2) in TMpgEnc DVD Author, it's often oversized by about 100-200 megs for the DVD+RW.

Problem is that DVD2SVCD doesn't always obey the size limit when I enter something like 4150 or 4200 in Bitrate. I'm using the CQ option in the Encoder tab and didn't touch any settings on the CQ test values. Well, not quite true, one time I tried entering 0.950 in CQ Value Factor and the resulting file was about 1 gig less than the maximum size for a DVD+RW! I always left the other settings in the Bitrate tab default.

Should I use CBR instead or modify the CQ test values? Something else? Thx!

[DDogg]

I'm using the CQ option in the Encoder tab Basically that prediction does not work correctly, IIRC. Use 2pass VBR when using TMPG. Arguably the quality is better within a given bitrate, but I'm certainly no expert on TMPG.

[jsoto]

IMO, CQ mode gives more quality (and its twice faster) than VBR 2pass. TMPG CQ mode works in a similar way than OPV in CCE.

But, CQ has an unpredictable output size (we have D2SRoBa in CCE). Many times you will get a file too large, and the only thing you can do is to reencode again with a fixed (and lower) Q than the one estimated by D2S.

There is a plugin http://forum.doom9.org/showthread.php?s=&threadid=65203 which does a different Q estimation, but, honestly, I never tried it and I do not know if it is compatible with the new version of D2S.

jsoto

[merlin9876]

Thanks, I've tried 2 pass VBR and ouch! 13 hours per pass? Ah well... ;)

[DDogg]

Thanks, I've tried 2 pass VBR and ouch! 13 hours per pass? Ah well... Ouch indeed :). You may want to just try CBR if you are using DVD. The bitrate will be plenty high I would expect to hold any complexity of the source, no matter how intense. Might be worth a doing a test to find out.

[merlin9876]

Will, try that. I've rechecked and it was 13 hours for both passes. And I had the Folding@Home screen saver chewing on my processor also, which didn't help I'm sure. I've reduced the Very High Quality setting to just High Quality for the 2 pass VBR, the time went down to something more interesting. Thx for the help!