Did I overburn or not ???

[tastypoison]

I downloaded an SVCD in bin/cue format from the Stargate Newsgroup. The nfo file stated that the filesize was 805 Meg and would require 5 Meg of overburning on a 700 Meg CD.

I use Nero for burning, and I DO NOT have the overburn feature activated as I have no intention of overburning. I have had files tell me that a 700 Meg disk was too small in the past, so I decided to give this a try...If it complained that the disk was too small, I would just delete the file without overburning.

I was surprized, but Nero burned it with no problem even though it identified the image as 806 MB. No warnings, no indication of overburn - nothing. The disk plays fine in my computer and my standalone JVC.

So...was this disk overburned or not? How can I tell for sure? I assume not since the overburn function is turned off in Nero, but then...806 MB on 1 CD???

[Baldrick]

No overburning. The bin/cue is in mode2 2352 bytes/sector(check the .cue file and it will say mode2/2352) and then you can fit 805 "raw" MB on a 80 min CDR/W.

Read this http://www.vcdhelp.com/forum/viewtopic.php?p=419144#419144 and you will understand a bit more....why you for example cant burn 805 MB data on a cd.

[tastypoison]

I do understand the difference between the capacity of a cd used to store data and one to store an SVCD. However, even the info you linked to shows a calculated limit of 797.9 MB (reduced to 795 MB in the conclusion) for SVCD. I had always heard 800 Meg was the limit, and aparently so did the poster of the SVCD image I downloaded since he said his 805 MB file would require a 5 MB overburn.

Obviously the CD holds more as an SVCD, but I had never burned one this big before. I really expected to get an error because of those extra 5 Megs. I just want to make sure that Nero is not overburning without my consent.

[Baldrick]

The bin/cue is in form2 2352 bytes/sector (about 805 MB on a 80 min CD) and it has nothing to if it is a SVCD, Datacd or an audiocd.

If you had a VCD,SVCD MPEG file that would be 805 MB you would get problem authoring it. (VCD,SVCD = 2324 bytes/sector = about 795 mb/cd). If you author the mpg file to a bin/cue it will be 2352 bytes/sector, it adds the extra 28 bytes.

[tastypoison]

Ok...that makes sense about the added size of the image.

But how about this...is the file size of the mpg file reported correctly on the burned svcd?

Windows says that Avseq01.mpg on this disk is 804 MB.
If I copy the file to my hard drive, it stays at 804 MB
If I use Avseq01.mpg as the input file to Nero for a new SVCD, it fits on a 700 Meg CD.

804 MB is still bigger than 800...
Just trying to get all these numbers straight

[vitualis]

A simple way to check is to simply use the vcddebug function in GNU VCDImager Tools GUI: http://www.michaeltam.com/vcdimager_tools_gui.html

You can of course just use VCDDEBUG as the console app (part of VCDImager).

Load the BIN file and set the text file to save.

In a few seconds, VCDDEBUG will give you some pertinent info about the image, including the size in sectors.

If the number of sectors is greater than 360,000 sectors (80min), then you will have had to overburn.

Regards.

[tastypoison]

Thanks...I'll give that a try

[tastypoison]

I've already deleted the first disk image, but the second is supposed to be the same size and was also labeled as requiring a 5 Meg overburn. Here is what VCDImager had to say:
-------------------------------------------------------------------------------
VCDdebug - GNU VCDImager - (Super) Video CD Report
$Id: vcd_debug.c,v 1.33 2002/01/04 20:20:29 hvr Exp $

Source: image file `C:\My Documents\TV\Stargate_SG1\Stargate.SG-1.S1.EP1-Disk2.bin'
Image size: 359301 sectors
SVCD detected
--DEBUG: found TRACKS.SVD signature at sector 185
--DEBUG: found SEARCH.DAT at sector 186
--DEBUG: found /EXT/SCANDATA.DAT at sector 225
-------------------------------------------------------------------------------

less than 360,000 sectors - so no overburning is required right?

Is this how Nero (and other software) would determine if the burn will fit on a disk? By the number of sectors? Or is it still somehow tied to file size?

Not trying to beat a dead horse here, but if these images really don't require overburning, I'd like to go back into the newsgroup and let everyone know. I just don't want to give the group any incorrect information.

Thanks

[vitualis]

Actually, 360,000 sectors is not quite correct (it is exactly 80min) as most 80min media actually only "officially" have 79min, 57sec and 74 sectors.

Thus, the total number of sectors before overburning = 359,849 sectors (I almost always say 360,000 because it is easy to remember).

Since your image is less than this it will fit onto an 80min disc WITHOUT overburning.

That is, overburning is not required!

I cannot say if this is how Nero and other burning proggies determine the size of an image (i.e., by looking at sector number) but it would be the logical thing to do.

Regards.