Having read conflicting statements, when is it best to use VBR or CBR?
+ Reply to Thread
Results 1 to 5 of 5
-
I should have been clearer with my question. I am concerned with quality, not speed. Need to know if 2 pass VBR or quantization factor produces higher quality.
-
In an ideal world, they will produce equally good results. The issue isn't which, it is when. If you have a definite size you must meet, then 2-pass VBR is the best method as it will hit a target size. If size isn't an issue then you might get better results from a CQ encode. FAVC employs a predictive quantization method whereby it encodes samples at different quant values until it finds the value that comes closest to the target size. For videos up to around 90 minutes, you will usually be hard pressed to spot the difference between this and a VBR encode. For longer videos, VBR is usually the better option.
Read my blog here.
-
Originally Posted by nicksteel
If you need files of a pariticular size (to fit a 2 hour movie on a 4.3 GB DVD, for example) you use 2-pass VBR encoding.
Similar Threads
-
cbr to vbr
By dynamix1 in forum AudioReplies: 1Last Post: 17th Mar 2009, 14:12 -
CBR vs VBR
By prl in forum Newbie / General discussionsReplies: 5Last Post: 11th Jan 2009, 18:48 -
question about vbr v/s cbr and 2 pass vbr
By perfection in forum Newbie / General discussionsReplies: 4Last Post: 14th Dec 2008, 03:55 -
Convert VBR to CBR
By Pariah69 in forum Newbie / General discussionsReplies: 1Last Post: 5th Aug 2007, 11:32 -
VBR or CBR?
By dizzie in forum ffmpegX general discussionReplies: 1Last Post: 29th Jun 2007, 14:28