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View Full Version : Maestro: Buffer under-flow during muxing due to exceeded bitrate?


Chetwood
12th May 2003, 08:39
So far everything runs smoothly with authoring except that I got this weird error message:


COMPILE SUCCESSFUL:

1 Warnings
- During muxing at least one instance of Buffer-underflow was detected. This is due to exceeding the Max. Bitrate.


How come? I've ripped those eps using DVD Decrypter off my original Buffy DVDs of the very same season and I haven't tampered with any bitrate settings in Maestro at all. So why didn't I get this error with previous eps? And why does it come up at all, the original eps should have been standard conform, shouldn't they?

How could this error effect playback on standalones? I don't wanna waste any DVD-Rs and I also would hate to have to verify all rips.

Dvd@Best
12th May 2003, 09:30
It means u have exceeds the max bitrate.Remember there is not only video bitrate BUT audio has bitrate too.So u have to keep an eye on both bitrate and sum of both should be not more then 10000 i think

Best Of Luck

Chetwood
12th May 2003, 09:41
Originally posted by Dvd@Best
It means u have exceeds the max bitrate.Remember there is not only video bitrate BUT audio has bitrate too.So u have to keep an eye on both bitrate and sum of both should be not more then 10000 i think


I get it but it weirds me out. Since I'm using the exact source material from my original DVDs (1 video, 2 audio, 2 subtitle streams) this would mean that they are also exceeding the max bitrate on the original DVDs?

Actually I'm even using *less* bitrate since the original episodes have some additional subtitle streams and occasionally director's comments audio streams that I've stripped on my rips. Where can I read about max bitrate on DVDs?

slk001
12th May 2003, 20:31
This is just a warning, and doesn't mean that you have exceeded the DVD maximum bitrate of 10.08Mbps. This means that your VBV (video buffer verifier) has had an underflow (ran out of data). It is NOT a fatal error - just ignore it and press on. The VBV is important for CBR encodes, and not so important for VBR encodes. This happens to me from time to time, with no ill effect if I just ignore it.