DV codecs-CCE and luminance level question

[SerbianBoss]

I read on doom9 forum that Panasonic and Mainconcept dv codecs uses a luminance range of 0-255.

I work with CCE and avisynth and sometimes i use panasonic and sometimes cedocida codec.

So in CCE is select luminance level 16-235. So is this correct when using panasonic or cedocida codec or i must change to 0-255 ?

[jagabo]

All codecs that use YUV should use 16-235 for the luminance channel. It's when YUV is converted to RGB that luminance stretching occurs. Most YUV-to-RGB converters will stretch the luminance to 0-255 when converting to RGB. Conversely, when converting from RGB to YUV the luminance is compressed from 0-255 to 16-235. If you are not converting back and forth between YUV and RGB you don't need to worry about this.

[SerbianBoss]

when converting from RGB to YUV the luminance is compressed from 0-255 to 16-235

So,when using panasonic dv codec to decode(panasonic work only in rgb) i add converttoyuy2(interlaced true) see script:

LoadPlugin("Convolution3d.dll")
avisource("D:\CAPTURE\bmw.avi")
crop(8,4,-8,-12)
ConvertToYuY2(interlaced=true)
SeparateFields()
odd=SelectOdd.Convolution3D (1, 32, 128, 16, 64, 10, 0)
evn=SelectEven.Convolution3D (1, 32, 128, 16, 64, 10, 0)
Interleave(evn,odd)
Weave()
AddBorders(8,8,8,8,)

This is rgb to yuy2 conversion. In that way does luminance stay at 16-235 ?
I only work with RGB to YUY2 conversion, not reverse

[jagabo]

So,when using panasonic dv codec to decode(panasonic work only in rgb) i add converttoyuy2(interlaced true)...

Yes.

This is rgb to yuy2 conversion. In that way does luminance stay at 16-235 ?

Yes, assuming the Panasonic DV codec performed the contrast stretch when it converted YUV to RGB.

[manono]

And you can easily find the luminance range by adding ColorYUV(Analyze=True) to the bottom of the script and scrolling around in VDubMod.