[Sparktank]

I have a question about the ConvertToYV12() function.

Sometimes, I'll remux a Blu-Ray movie from disc and convert it down to a 480p (with Rec.709 -> Rec.601) resolution to feed to AVStoDVD.
Frameserving with FFMS2 and using VirtualDub to save as an AVI with Lagarith compression.
The "Color Depth" options in VD are both set to "4:2:0 planar YCbCr (YV12)" and I'll even throw in ConvertToYV12() in the AVS script before converting to a LAG.avi file.
Lagarith settings are: Mode=YV12, Prevent Upsampling When Decoding=Yes

Using DirectShowSource on the LAG.avi with Info() shows that it's already YV12.

But every time I load it into AVStoDVD, the autoscript will always show ConvertToYV12().
Is this normal? Or will it affect the colorimetry?
Am I doing something wrong?

I find this also happens with UtVideoCodec (YUV420 (ULY0) VCM x86) as well.