CDR Sizes and Bitrate Calc in VBR

[ginoserg]

I've tried my first backup. Using a web-based bitrate calc (on vcdhelp.com) for a 119' DVD I've put: lenght 120', fit on 2 x 80' CD. For SVCD it gives Bitrate = 1580.

I made some tries with:

- CBR 1580
- 2 pass VBR 1580 (min 0 max 2520)
- and CBR 2480 (thinking at 3 CD instead of 2).

After these tries (2 min. each), burned on CDRW and seen on my Pioneer 535, I've decided that VBR was a good choice. It was very very similar to CBR 2480. The only drawback was encoding time.

So for the (night) final run I've setup tmpgeng 2.53 for 2-pass VBR 1580 (min 0 max 2520); I've also set two ranges, first half and second half with an overlap of 120 frames (about 5') so I finally get 2 mpg ready to burn.

Total encoding time (with high-motion search, SVCD output 480x576, 2 pass VBR, etc ) was about 7,5 hours on an Athlon XP 1800+

Here is the problem: my 2 files are 795 Mb each. I know that on a 80' CD I can put more than 700 Mb, counting on what windows say about files (I think it's for the problem 1 Mb = 1024, or something like that), but I don't think that these files can fit!

I had not enough time to try the burn with nero, I'll try this evening.

You think that the size is right ?? Or something went wrong with Tmpgenc / bitrate calc ? Or I can't use that bitrate calc for VBR ?? Where is my error ?

Thanks !!

[ginoserg]

WOW !

A lot of replies to my post....

Ok, I'll answer to myself... so someone here will also learn something:

I've tried to burn, and all went well. The SVCDs work well, even with my Pioneer 535, and that was not an overburn.
I discovered later that when you make a SVCD (with nero or other softwares) you always get a "Mode-2/XA" CD.
This type can fit more data in the same track. So even if you have a 700 Mb CD (80') you can burn a file of about 830 Mb.