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30th August 2009, 17:01 | #223 | Link | |
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Given all the overdriven LCD displays with brighness set for daylight viewing but watched in the dark, pretty much all codecs need to have some low-luma range DQuant and even de-noise to reducing blocking-in-blacks. The video gamma curve the perceptual uniformity of a CRT, but that's out the window with LCD and plasma in the low luma range. |
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30th August 2009, 21:53 | #224 | Link | |
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then Ben? you Cant buy anything competitive or even higher mid range and HD capable in the main UK retail outlets these days thats Not an LCD, even if you wanted to... perhaps its different in the US but not the EU. Last edited by popper; 30th August 2009 at 21:58. |
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30th August 2009, 22:41 | #225 | Link | |
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The problem is that the entire digital video delivery system still assumes CRT as a baseline. And we got lucky in that CRT and the human eye had a very similar gamma curve in terms of input level to perceptual value, and thus perceptual uniformity. But since LCD doesn't have the same characteristics, we get weird stuff in the low lumas. And that's stuff that PSNR and SSIM aren't going to catch, since they also assume perceptual uniformity of the luma range. |
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31st August 2009, 11:57 | #226 | Link |
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So what do you guys think about a slicing patch?
'cause I have one working, and it even works with one-MB-per slice at 1080p (8100 slices!). Fun fact: both my stream analyzers fail with that many slices; only ffh264 (compiled with MAX_SLICES=8192) and CoreAVC decode it correctly. JM works, but takes about 92 seconds per frame. Speaking of which, is there any reason to have slices which consist only of horizontal bands and don't end in the middle of a row?
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31st August 2009, 13:07 | #228 | Link |
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Sounds like x264 is going to be another step closer to a fully Blu-ray compliant H264 encoder. Great work! I'm looking forward to this patch and I am totally excited about the weightp one that is hopefully coming soon .
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31st August 2009, 13:22 | #230 | Link | ||
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31st August 2009, 13:31 | #232 | Link |
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I personally don't care about BD and thus I don't need slices. So I hope this won't effect Non-Sliced encoding.
But yes, it seems there is great demand for this in the "community"
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31st August 2009, 13:37 | #233 | Link |
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It would be very nice to be more compliant with blueray spec, and if it's an optional switch, it will not hurt anything
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31st August 2009, 13:40 | #234 | Link |
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...unless some efficiency and/or maintainability must be sacrificed to integrate slices support, which I hope isn't the case
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31st August 2009, 18:48 | #235 | Link | |
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I'm still doubtful that Level 3.1 will offer any perceptible quality advantage with 1080p24 content over Level 3.0. |
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31st August 2009, 19:10 | #236 | Link |
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Sounds good to me. As I understand it, most players are perfectly happy without slices - but I'm always okay with better compatibility. "Most players" is a no-go if you're going to replicate discs
As long as it doesn't kill quality horribly! BluRay does have plenty of head room for bitrate ~MiSfit
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31st August 2009, 21:51 | #239 | Link | |
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Yes, sorry.
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31st August 2009, 22:28 | #240 | Link |
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Follow x264 development progress | akupenguin quotes | x264 git status ffmpeg and x264-related consulting/coding contracts | Doom10 Last edited by Dark Shikari; 31st August 2009 at 23:13. |
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authoring, blu-ray, compliant, verified, x264 |
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