what factors make a video file non standard compliant?

[bunnihooligan]

Okay....I've been trying to burn a vcd with nero containing a bunch of music video mpeg's and since my dvd player is xvcd compatible, I kept choosing to shut of the standard compliance mode on nero because every time I choose the "re-encode" option, Nero has a fit(it doesn't freeze, but it won't let me add files and the burn icon at the top grays out) Anyway, I burnt the vcd and only 3 or 4 of the 10 files plays at the right speed with out skipping. I tried to figure out what was different about the files that didn't work compaired to the ones that did. I used virtual dub to find that both the files that did work and the ones that didn't were 29.97 fps, and I had set it for NTSC so I don't think that was the problem. Also all the files were 352x240...Can anyone give me a list of all the factors that could make an mpeg non standard compliant? And does anyone know why Nero freaks out on me when I ask it to re-encode?

[bugster]

The problem is most likley bitrate. Take a look here:
https://www.videohelp.com/vcd
and here
https://www.videohelp.com/svcd
for specs