and I export it to a lossless codec.
What would that codec be?
I tried with Lagarith, huffyuv, and canopuss lossless.
Always same reults with premiere.
Thanks for you test Joe
Funny thing, your exported frame five the same resuls as your lagarith.
It's not the case for me.
Then, I levelled up your grab as I did for the edius one, and this is what I get :
It's far better than mine from premiere.
But still as not as good than the one from edius.
Anyway, you have different results than me, and that's what matters.
Could you tell me which windows are you using, and your quicttime version ?
Quicktime v7.6.9 (1690.9)
The image you downloaded was compressed to .png from the original .tif export.
The .tif was too big to post.
I will try to install this quicktime version tomorrow.
Maybe its the reason of this issue.
Thing is, I still get better results from Edius and procoder.
So I don't get it.
So I made some test with your quicktime version, and it doesn't change anything.
But I think I've figured it out.
It's simple :
Premiere import the yuv file in 10 bit is in RGB color space.
Between import and export to lossless codec, it makes two things :
- Convert the input YUV to RGB.
- Convert the 10 bit to 8 bit.
Result is a video file RGB 8 bit.
You can of course chose a YUV codec to force export in YUV 8 bit.
And you'll get better results, but the conversion YUV=>RGB=>YUV will slightly change colors.
That's why it's not as good.
To prove it I made a different test :
- I export the 10 bit YUV ProRes file to uncompressd 10 bit YUV.
and result was perfect, but with slight change of colors (YUV=>RGB=>YUV)
I think the CS5 new feature of working YUV files in RGB space is the reason of all.
And it has mportant drawback.
I hope CS6 will allow you to chose your space color workspace.
To the best of my knowledge, Premiere Pro will only force an RGB conversion if it needs to. For example, if you have applied an effect that requires it.
If you start with a YUV clip (as most everyone does these days), use only YUV effects, and export to a YUV format, PP should keep it in YUV space the entire trip.
I would also not expect any significant alteration going from YUV to RGB. The formula isn't perfect, but the errors are generally below the level of human vision.