Does anyone know of any discussion forums or websites that can explain in depth and until your heart is content on bitrates, cbr and vbr.
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There's not a lot to discuss:
Constant bitrate uses the same bitrate for the entire video. A featureless black segment will take just as many bits as a highly detailed, high motion segement.
Variable bitrate will allocate more bitrate to scenes that need it, less to scenes that don't.
So for the same file size (same average bitrate) a VBR video can be better quality than CBR. Or it can have just as good quality with a smaller size (less bitrate).
Just go to the top of the screen and stick the word ...bitrate...in the little rectangular box and then click on...... search all forums.......You will get opinions that do not agree with the previous post.......
Originally Posted by bendixG15"Art is making something out of nothing and selling it." - Frank Zappa
Note I've been speaking of 2-pass VBR vs. 1-pass CBR. There are some programs that use a single pass VBR and those generally don't do as good a job as the 2-pass VBR encoders.
One place where it may not make sense to use VBR is when you are putting less than an hour on a single layer DVD. You might as well save time and just use a high constant bitrate (8000+ kbps) encoded in a single pass.
Originally Posted by jagabo"Art is making something out of nothing and selling it." - Frank Zappa
Originally Posted by jagabo
VBR will be more successful if the video was shot from a tripod and with controlled pans and zooms.Recommends: Kiva.org - Loans that change lives.
edDV, yes......and also with most retail dvd's...the main thing to note, though, is this, as far as audio tracks are concerned, you will always want to use CBR on the audio, as vbr can cause synch issues and such......
I have 60 min. of video to convert to mpeg for making dvd.
Can I use constant bitrate of 9250 + audio mpeg 224.
Yes, but that might be pushing your luck. Some of players don't handle R and RW media as well as pressed DVDs. leaving more headroom will help them out.
MP2 audio is part of the PAL DVD specification. It is not required of NTSC players although many (most?) of them can handle it.