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Robert,
Interesting. But here (and just updated Aftercodecs to 5.1), I’m getting crashes and black frames trying to output. I finally did a complete file but AE does not see it as 10-bit and choosing the full range option causes everything to be
crushed black. Other codecs are fine so it’s some problem with After Codecs x264.
Stephen
From: After Effects Mail List <AE-List@media-motion.tv>
Sent: Wednesday, February 20, 2019 4:07 PM
To: After Effects Mail List <AE-List@media-motion.tv>
Subject: Re: [AE] Visually lossless codec thoughts
Hi Stephen
just did a quick output test with 10bit vs 8bit AfterCodec x264 files, and 10-bit is not really 10-bit, more like 9-bit if my thinking is correct here.
Did a 1024x1024 comp with a ramp from left to right giving 1024 steps (obviously :-P) that should correspond to how many graduations are possible in 10-bits. Importing this file and it will show us as a gradient jumping every 2 pixels,
so 512 steps = 9-bit.
That AE says the file is "millions of colors" (ergo, 8bit in outdated Apple QT lingo) might not be trustworth info :-)
outputting a 8bit x264 mp4 file will give a dithered 8bit ramp, and a therefore a larger file than the 10/9-bit file with semi-smooth gradients
So there might be a benefit in using x264 10bit in your case?
X264 lossless and x265 are both fails. X264 at 10-bit, AE says is 8-bit. X265 take 10x time to render out in Media Encoder and takes an unknown time (at least 100x) to build a frame.
I gave up after 11 hours – every other codec was 14 to 22 minutes a frame.
Adobe and x265 simply don’t play in my experience.
From: After Effects Mail List <AE-List@media-motion.tv>
Sent: Wednesday, February 20, 2019 5:57 AM
To: After Effects Mail List <AE-List@media-motion.tv>
Subject: Re: [AE] Visually lossless codec thoughts
x264 has lossless compression methods and can also be 10bit.
AfterCodec has support for 10bit and YUV 4:4:4, not the lossless mode as far as i can see, but a high bitrate x264 should be better than the old simpler DCT based Prores or DNxHR
at comparable bitrates
Now the question is if AE will import them correctly again.
Personally I have the opposite experience, with Prores producing about
20% larger files than same flavor Cineform. I tried CFYUV10bit.
On 20-Feb-19 01:07, Teddy Gage wrote:
> Chris AFAIK cineform files are even bigger than Prores at the same
> flavor.
+---End of message---+
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