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zerowalker · 16th November 2013, 19:49

Don´t have any sample videos, but can say state some color formats.

First YV24, even though it´s mostly unnecessary, it shouldn´t be to hard to implement while you are at it.
And then Rec.709, which is extremely useful but very rarely supported in a lossless codec.

Well that´s probably about it now that i think about it, i hope that was something you wanted to know, or perhaps you wanted to know something about bitdepth and such, if so i provided the wrong information.

I hope you see this through, Lagarith is an underestimated codec, and what´s it mostly is lacking is support and perhaps tweaks for encoding/decoding with newer CPU instructions.

EDIT:

Original 10bit videos will probably be quite hard to obtain, but it´s fairly simple to make one.

Take a video with much darkness and gradients. Fix it with Avisynth and work in 16bit.
Dither it to 10bit.

That way it won´t be upsampled from 8bit for no reason, and there should be pretty useful information in the last 2 bit that should have impact on compression.

But of course a 10bit Broadcast tape would be preferred, but can´t see a way to obtain one if you don´t have some good contacts.

16th November 2013, 19:49	#146 \| Link
zerowalker Registered User Join Date: Jul 2011 Posts: 1,121	Don´t have any sample videos, but can say state some color formats. First YV24, even though it´s mostly unnecessary, it shouldn´t be to hard to implement while you are at it. And then Rec.709, which is extremely useful but very rarely supported in a lossless codec. Well that´s probably about it now that i think about it, i hope that was something you wanted to know, or perhaps you wanted to know something about bitdepth and such, if so i provided the wrong information. I hope you see this through, Lagarith is an underestimated codec, and what´s it mostly is lacking is support and perhaps tweaks for encoding/decoding with newer CPU instructions. EDIT: Original 10bit videos will probably be quite hard to obtain, but it´s fairly simple to make one. Take a video with much darkness and gradients. Fix it with Avisynth and work in 16bit. Dither it to 10bit. That way it won´t be upsampled from 8bit for no reason, and there should be pretty useful information in the last 2 bit that should have impact on compression. But of course a 10bit Broadcast tape would be preferred, but can´t see a way to obtain one if you don´t have some good contacts. Last edited by zerowalker; 16th November 2013 at 22:10.