Nero's tools to check accurate VCD burn, which is best?

[Hong Kong Phooey]

Hi everyone. I've been burning VCD's using Nero 5.5.8.2,(using TMPGenc VCD-ready mpeg 1 files converted from AVI.). I've been using Mitsui Gold 12x 74min CDR's & Kodak Ultima's Silver & Gold's 80min CD-R's. (Using an Asus 4012A, all at 4x speed burns.)

The finished VCD's play fine on WinDVD (via my Liteon 52x CD-Rom), on the PC,& also my Toshiba SD-2500 standalone DVD player.

I've been checking the burnt CD's using Nero's CD speed tools using "CD Quality Check", "Scandisk", & "File Test".
I've been finding that the "Scandisk" tool will report typically between 0.2%- 1.5 % yellow sectors on a number of the burnt disks,though not all.

Rechecking these burnt disks using "CD Quality Check" can again on occasions report yellow lines on the graph for a tiny portion of the check & report typically between 8-400 errors though for example it'll report
"280 errors 0.00%".

Finally, on ALL the burnt CD-R's the Nero "File Test" will report "0 errors" ,even on the CD'Rs that might have 0.24% yellow sectors using the scandisk.

I'm intending to delete the original Mpeg files from my hard disk to free up some space, but I want to be sure that my burnt VCD "Dat" files of those mpegs are "safe" so that I can always reconvert them to Mpegs again or recopy them to a new VCD.

1) Which Nero test would be the most accurate in determining my burnt VCD's (& their mpeg "DAT" files), are okay? (escpecially for reuse)

2) If the "file test" Scan disk reports 0 errors,can I assume the VCD/DAT is okay despite any yellow sectors that may be on that disk? (albeit only a small percentage,if any)

3) why would the CD quality check tool report errors but next to the errors it'll say 0.00% eg: "280 errors 0.00%".

As I said originally, the actual VCD's play fine on both the PC & my DVD player, I just want to be sure the mpegs are safely burnt so I can delete them off the harddisk.

The one difference I did note between the File test utililty vs. Scandisk & quality check was that the File test would read at 12x where as the other two tests read as much as 35-38x speed, would that the difference in results?
Thans for the input,I'd appreciate some answers!

[vitualis]

Contrary to popular opinion, VCDs still contain error correction. It just doesn't have ECC that CD-ROMs have.

Most CDs burnt will have C1 and C2 errors (the jitter on audio CDs) but as long as they can be corrected by C1 and C2, there are no errors in the data stream as such.

That is, on a normal CD-ROM, ECC is only needed when there is an error uncorrectable by C1 and C2. On a VCD or audio CD, such an error will not be corrected and lead to a "real" error.

I don't know what Nero means by "yellow" sectors, but I presume that it is referring to C1 and C2 errors.

Regards.

[Hong Kong Phooey]

Thank you for replying Vitualis.

Nero's scandisk util's "yellow sectors" are supposed to indicate damaged sectors. Red are supposed to be unreadable, & green sectors are okay sectors.

If these are due to merely "audio jitters" are you saying the rest of the burnt VCD is essentially fine then? (in terms of copying the mpeg/DAT file)

May I ask,what are C1 & C2 errors that you are referring to about?