Increasing the buffer size, does it help?

[DMaarten]

Just a little question: I make svcd's from dvd rips of dbz epz (and they look great btw) following the way at http://www.doom9.org/mpg/avi2svcd.htm , but instead of vbr I use CQ at 100, minimun and max bitrate at 2500, burn it at 4 speed with Nero.

The standard buffer is 112 KB (Tmpgenc) Would it stop the occasional jerking/stopping for a frame/simular situations if I double the buffer? I learned quite a lot of tmpgenc but none of the infosites have any info about the buffer stuff.
I also get (sometimes) that the image is R E A L blocky for a split frame or so (it's 2 fast for me to time :P) but obvious nontheless..

[Truman]

What you describe sounds like a buffer underflow.
The standard buffer size should be 112 segments= 224 KB. The higher the range between min and max bitrate and the more B-frames you set in the GOP structure, the higher the VBV buffer must be set.
If you want to make SVCD (MPEG-2 / main profil & main level) use in TMPG 224 KB.

[DMaarten]

I don't do anything in the GOP stucture and settings, that is still abracadabra to me. I'll increase the buffer, and try it out thnx

[Triffid]

Truman (if you are reading this!),

I have noticed that TMPGEnc sets the VBV to 112 for SVCD, but checking the file with Bitrate veiwer shows only 56. Is this the sements vs kB you were refering too? I tend to always double the value in TMPGEnc, from what it has as standed so that I get what I suppose to be the right result in Bitrate viewer (ie SVCD 112kB ). Is this right?????

[Truman]

Bitrate Viewer tells you the VBV buffer size in segments. 1 segment = 16 Kb (16384 bits, not bytes). In TMPG you set the VBV buffer size in KBytes.
Short said, yes, you are right.
In most TMPG SVCD templates the size is set to 112 KB, that may be too low in many cases.

[Triffid]

Thanks Truman,

I'll keep doing what I've been doing!