As far as i know, YUV 4:2:0 data on PC, or at least on AVI, can only be processed by YV12 codec/format.
So... If i open an avisynth file with DGDecodeNV, asking for "RAW" decoded, data, no upscale, no convertion, nothing, a file from a Blu-Ray wich is 1080i@29.97, i have 4:2:0 Rec709 interlaced material.
Now, i want to save this on an avi file, no upscale, no convertion, nothing, the only way i know it to save with YV12. This will result with an YV12 file with interlaced Rec709 data. You may tell it's bogus, but in that case, tell me the "no-bogus" way of saving an AVI video in 4:2:0 interlaced Rec709 format...!
Interlaced put aside, i have indeed several questions, because things may not work as i though.
I have made an RGB convertion filter, on which i select the matrix color format (BT.709, BT.601, SMPTE 204M, FCC).
Filter works only with YUV444 and RGB. So, if input is 444, the color matrix used is the one in the selection, not the one tagged with the YUV444, and output is RGB. If input is RGB, output is YUV444, tagged with the color matrix (or the closest for SMP/FCC) selected. I'll call this filter RGBConv from now.
I've updated all my filters to use/tag the new extended format, when necessary.
My purpose is to create "YV12", or 4:2:0 Rec.709 avi file, to feed a basic avisynth file with only AVISource, which will be the input for encoding with x264 in purpose of targeting Blu-Ray.
Sometimes on my process, i need to use a filter which work only on RGB data.
Compression is set to UT Video YUL0.
I've 2 cases :
a) Input1 : Input is a DVD source, avisynth script with DGMPGDecode, decoding "RAW" : no upscale, convertion or anything. In that case, video is 4:2:0 Rec 601, view as YV12 DIB internal decoder.
Input2 : Input is a Blu-Ray source, avisynth script with DGDecodeNV, decoding "RAW" : no upscale, convertion or anything. In that case, video is 4:2:0 Rec 709, view as YV12 DIB internal decoder.I want to avoid unexpected and unwanted color convertion.
Case a) configuration :
Color Depth : Input YV12 (default of Rec601), output YV12 Rec709
Input1
My own 4:2:0 -> 4:2:2 convertion filter.
RGBConv (Rec 601)
Filter Process RGB
RGBConv (Rec709) -> output YV444 Rec709 format.
convertion format (VDub) YV12Rec709
Alias Rec601
... Not working.
Remove alias, not working.
It seems that if output is set to YV12Rec709 i can't indeed no save at all... Even on uncompressed.
Is there a codec/way to save if output is set to YV12Rec709 ?
If not, what the point of allowing it ?
Case
configuration :Color Depth : Input YV12 Rec709, output YV12 Rec709
Input2 -> As input is defined in Rec709, i assume VDub is not doing any color convertion, is it correct ?
My own 4:2:0 -> 4:2:2 convertion filter.
RGBConv (Rec 709)
Filter Process RGB
RGBConv (Rec709) -> output YV444 Rec709 format.
convertion format (VDub) YV12Rec709
Still same ending issue.
I wanted to use the new color format, this would have been more precise in my working chain. But, from the tests and what i see, for now they provide only hindrance and zero benefit. I'll probably reverse to the first case, where i tag everything on simple "YV12"...
)