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1st October 2008, 11:34 | #1 | Link |
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huffyuv --> x264 lossl. = broken?
This happens when I use a huffyuv avi and x264 lossless compression. If I use CRF there's no artefacts. Job commandline: Code:
"C:\Program Files (x86)\megui\tools\x264\x264.exe" --qp 0 --nf --subme 1 --partitions p8x8,b8x8,i4x4 --merange 12 --threads auto --thread-input --sar 1:1 --progress --no-psnr --no-ssim --output "E:\EM 3 Derain GradFunk.mkv" "E:\EM 3 Derain GradFunk.avs" The script: Code:
setmemorymax(400) aviSource("D:\temp2.avi", audio=false).converttoyv12() Derainbow() GradFunkMirror(strength=3) |
1st October 2008, 11:45 | #2 | Link | |
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Are you using CoreAVC to decode?
http://git.videolan.org/?p=x264.git;...4100ca26a29d92: Quote:
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1st October 2008, 12:52 | #3 | Link |
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Are you saying I should? (I didn't understand almost anything from the list)
I was using ffdshow. OK, I've tried CoreAVC and it looks ok (the weird artefacts are gone) but I don't like the colours, everything is too dark. I don't understand why ffdshow's libavcodec wouldn't work now. What's different? AVC lossless--->AVC lossless works OK. Last edited by aand; 1st October 2008 at 13:03. |
1st October 2008, 19:03 | #8 | Link |
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So is Lossless 4:2:0 still around then? (i.e x264 -q0)
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1st October 2008, 23:05 | #10 | Link |
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So, forgive the ignorance, but what's the difference between 4:2:0 and Predictive 4:4:4?
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1st October 2008, 23:08 | #11 | Link |
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x264 doesn't actually have lossless predictive 4:4:4 I believe, just 4:2:0. Only difference is we use 12 bits instead of 24. (YV12 vs YV24, in other words)
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1st October 2008, 23:10 | #12 | Link | ||
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Quote:
Quote:
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1st October 2008, 23:15 | #13 | Link |
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Dark Shikari's post:
I -believe- we don't actually use 4:4:4 precision but we do use predictive lossless.
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1st October 2008, 23:18 | #14 | Link |
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That's my interpretation as well...
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2nd October 2008, 02:14 | #16 | Link |
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lol funny marketing gag you can advertise with High 4:4:4 but only support 4:2:0 hehe i guess it isn't really allowed in the commercial world though as it would be highly misleading, or is it ?
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2nd October 2008, 02:19 | #17 | Link | |
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Quote:
"High 4:4:4" was the old profile that allowed lossless. No other profile allowed lossless. "High 4:4:4 Predictive" is the new profile that allows lossless. No other profile allows lossless. Do you want me to lie or something, will that make you happy? "x264 supports High 4:2:0 Predictive Profile." There, I just lied, is that fine with you now? |
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2nd October 2008, 02:29 | #18 | Link |
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Clarity would be helpful, since specifically applying that change, with that commit comment, assumes complete 4:4:4 Lossless encoding support in x264, which is incorrect, since x264 only supports 4:2:0. An average joe who wants to encode losslessly with x264 would assume, with that change, he gets 4:4:4 support, which is incorrect; this is without knowing what the spec profile allows.
What chances are there of x264 supporting other different YUV colourspaces?
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2nd October 2008, 02:31 | #19 | Link | |
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Quote:
Alternate colorspace support would be nice, but would require all sorts of modifications across the code, mainly changing constant shifts to non-constant ones. It would be really really really annoying to do. I'd like it, though. Another problem, also, is that libavcodec doesn't support anything other than 4:2:0 either. |
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2nd October 2008, 02:36 | #20 | Link | ||
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Quote:
Quote:
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