Question about YV12 color conversion

[rubyeye]

This is something that's only mentioned a couple times but I just wanted some clarity:

The optimal scenario involves only 2 colorspace conversions:

1) - MPEG2 from DVD in YV12, processed with Avisynth in YV12 and then converted to RGB32 ready for editing.

2) - RGB export from editing program using Huffyuv in RGB mode and then converted to YV12 ready for the final video compressor.

If this is my final avisynth script for encoding in either XviD or Mpeg-1/2...

AVISource("C:/folder/file.avi")
ConvertToYV12() <-(?)
AssumeFPS(23.976)
Crop(8, 0, -8, -0)
LanczosResize(512, 384)

...do I still need to convert the colorspace even if I am not doing any filtering? Do encoders like XviD and TEMPGEnc only work in YV12 colorspace? All my filtering was done in Pre-Processing.

[AbsoluteDestiny]

You can leave it out and have xvid an tmpg do the yv12 conversion for you.

For xvid, there will be absolutely no change. For TMPG, it's less certain becuase it can oddly have trouble with yv12 input despite the fact that the mpeg1 or mprg2 it creates will be yv12.

[Tab.]

For TMPG, it's less certain becuase it can oddly have trouble with yv12 input despite the fact that the mpeg1 or mprg2 it creates will be yv12.

TMPG accepts all input as RGB32, as far as I know.

[rubyeye]

Well, my video is in RGB24. So I guess XviD and Mpeg automatically converts it to YV12 color space.