Variable Bit Rate questions

[F u r u y á]

When encoding movies with TMPGEnc, I use the 2-pass VBR. Well, actually I got 3 options for VBR: 2-pass (VBR), Manual (MVBR) and Automatic (CQ_VBR). I just want to know what each one stands for, and what's the best to use.


One requiriment for me is to know the final file size, I use the 2-pass because I can foresee the file size, but reading some other posts I notice that some people uses other VariableBitRate like MVBR.


If you can tell me some page which explains well all that 3 VBR's would be nice.


Thanks in advance

[Nelson9937955]

http://www.videohelp.com/tmpgencexplained.htm

[F u r u y á]

Which one you recommend?

The 2 others VBRs (MVBR and CQ_VBR) are better than 2-pass in any way? I can figure out the file size with that other 2 VBRs?

[chulew]

Am I understanding it correctly that 2-pass vbr is only going to work for MPEG-2?

[jimmalenko]

Am I understanding it correctly that 2-pass vbr is only going to work for MPEG-2?

No. 2-Pass VBR works just fine in MPEG-1.

[spiderman2k1]

The only time I have ever had problems with VBR is when converting PAL to NTSC then use CBR.

[chulew]

2pass from http://www.videohelp.com/tmpgencexplained.htm
says at the end that "This is for MPEG-2."

I couldn't see any diff using the same bps for each mode but maybe that's because my video quality is low to begin with. The filesize turned out the same though.

By the way, I'm encoding to VCD format with 128k sound.

[chulew]

Thanks to jimmalenko for his guides at http://members.dodo.net.au/~jimmalenko

I used the bitrate calculator for TMPGEnc and it was awesome! I have 20 programs (30 hours) evenly spaced on 4 dvds with minimum acceptable encode rate.