YV12 questions

Hello all, Is YV12 & AVISynth 2.5 just for Xvid etc ... or can it be used for conversions to MPEG1 or MPEG2 (DVD to(S)VCD) via TMPGenc or CCE? Or do these 2 encoders not support YV12? I ask because the speed gains people have posted are very impressive. If not, are the improvements to the plugins, like MPEG2DEC3 (up to 0.91) etc, going to be made to the plugin versions for AVISynth 2.06, or are the changes just YV12 specific? thank you for your patience. MattO

hakko504, if what you say is true (which I think it is) then how do DVD Authoring Studios that make Big Name DVDs encode MPEG-2 into YV12 format? Maybe a higher end MPEG-2 Encoder? Hardware Based? Man, I thought CCE was high end! Dali

@Ed The conversion YV12->YUY2->YV12 should be without losses if it is done correctly. Incorrect conversion will introduce rounding errors but shouldn't be that much of a problem. Going the route via RGB is definitely the wrong way, but most of the time it shouldn't create too much errors. It will take time though, quite unnecessary. I usually does DivX so I'm not familiar with TMPEG so if someone know whether it actually uses RGB or not, please post here and say. The conversion YV12->YUY2->RGB->YV12 is both stupid and slow. If CCE is able to deal with YUY2 directly this may be a cause of the presumed higher quality of this encoder compared to TMPEG.

Actually YUY to RGB and back causes much more of a difference than is given credit, take a look at and compare the pictures, so the loss isnt just speed unfortunately

Point taken. Quite convincing pictures really, I have never looked at the conversion close before as I almost always use straight YUY2 in AVIsynth for my encodes to DivX5.02.