Quote:
Originally Posted by J-Wo
The one thing I have changed recently in my encodes is a setting in tmpgenc for VBV buffer size. By default it's 40 KB but I set mine to 0 (automatic). This supposedly solves random unexpected errors which crash the program.
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I'm pretty sure I remember Kwag saying long ago that he chose 40 as kvcd's VBV buffer size after determining that it was more compatible with more dvd players (in other words, going too high or low with this value can lead to playback problems sometimes). I also think he mentioned that using 0 and letting TMPG determine the value for you wasn't the greatest idea because it often led to problems. Perhaps he will see this post and jump in here to explain it better for you. (or you can search through his old posts).
Personally, I've tried this trick too and ran into the same muxing problems as you with underflows when using 0 vbv buffer (although the files still played back fine, possibly because they were only ~20minutes long...or maybe my dvd player just handles vbv-issues well). I've really only used this 0-vbv trick on a few fullscreen anime/cartoon encodes because those seem to cause illegal decimal problems often for me (I think I've only ran into maybe 1 or 2 instances when a regular widescreen film gave me an illegal floating decimal point error!).
My only suggestion would be to not use the 0 vbv buffer setting
unless you really need to (even though this "trick" seems to always result in a successful encode, wheras other "tricks" listed here might not!
) . If you do use 0-vbv, you might also try muxing with TMPG instead of BBMPEG to see what happens, if you haven't already tried this (although there's a reason why BBMPEG is the recommended muxer here....more people report more problems with TMPG-muxed files on their dvd players...so I wouldn't hold my breath that TMPG's muxing will be the solution).
I've also found that sometimes just bumping up the vbv by 2 measely points results in a successful encode, while other times I needed to use 60vbv or even higher on some files.
It certainly isn't fun playing the guessing-game, and I can sympathize with you, that's all I know!
Good luck.
-d&c