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13th September 2008, 16:04 | #1 | Link |
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On2 VP8
Did anybody get to beta test it? I don't see a personal use version on their site. I hope they release one.
http://www.on2.com/docs/graf/splash_on2.html |
13th September 2008, 18:00 | #2 | Link |
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Looking at the sample clip, it's interesting how they got x264 output to look like MPEG-4 (A)SP with all that macroblocking and somewhat annoying keyframe pumping. Would be nice to see the settings used. VP8 output on the other hand looks pretty much like x264 a year or two ago (without AQ and Psy RDO).
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13th September 2008, 18:08 | #3 | Link |
RipBot264 author
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"...VP8 50% better than h.264" Hahahaahahah Good joke. Besides PSyRDO shows that in fact PSNR value is USELESS!!!!
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14th September 2008, 02:21 | #7 | Link |
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3 years ago On2's devs made everything possible for that VP7 could compete with x264 (revisions 2xx). They constantly were updating their codec from VP7.0.0 to VP7.0.9.
I hope On2's devs will try to do the same for vp8. Of course now VP7 has no chance to be comparable to x264. Since then there was only misc. update vp7.0.10. I think the most important problems that VPx codecs have unstable local quality while overall quality isn't bad. VP7 has a problem with scene change. Key frames are highly quantized and rest of sequences recover details in temporal sequence. As a results there is no constant quality. Another issue is too strong deblocking filter. It's good only for very low bitrate. To compete with x264 they must plan long time development to achieve solid and well tuned codec. Just my opinion. And good luck for a small company On2. They aren't MS to spread millions for VC-1 and they must face big standard. Last edited by IgorC; 14th September 2008 at 02:24. |
14th September 2008, 11:01 | #11 | Link |
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Bond : golden frames are indeed like references in h264, but limited to 2 references max : the previous reference, and another one, that can be updated whenever they want. It seems it can be updated piecewise too, which makes it a bit more flexible than 2 references with h264. As for the usefulness of that, I don't know. It must help in some contrive cases, but beyond that... In any case, it will help less than bframes & bpyramids would, but they can't use those because they are afraid of patents (though bframes should be patentless by now, I think).
Their description of their loop filter and its adaptivity to motion doesn't impress me. h264 loop-filter also adapts to motion (though the way it adapts to motion seems different from VP8's). Their visual results for h264 seems a bit strange, since I seem to see a good old IDCT mismatch drift during the GOP, which can't happen with AVC. As stated by nm, it more looks like ASP than AVC. As for the PSNR curves, they must always be taken with a (huge) grain of salt, wherever they come from. Since they don't say which encoder and which settings are used, however, the curve most probably are correct. They just don't mean anything and can be ignored. Dark Shikari : sagittaire is right, when it came out, VP7 was lighter than existing AVC decoders, and more than hold its ground quality-wise. Our encoder, at that time, only managed to consistently beat it when we included High profile.
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14th September 2008, 19:52 | #12 | Link |
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Yeah about the PSNR results they dont say alot tough for H.264 basicly with inloop deblocking it means higher PSNR and most times looks awfull tough with VP8 it doesn't have to be the same because they use a complete different deblocking aproach which seems really interesting , though 50% is a heavy claim thats like they wanted to say: "hey look we drove ahead of MPEG before they even get started with H.265"
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16th September 2008, 02:06 | #14 | Link |
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i wonder if they will release a free-for-personal-use encoder.
then speculation will end...
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16th September 2008, 02:28 | #15 | Link |
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Plus a free-for-personal-use decoder library, of course
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16th September 2008, 08:58 | #16 | Link |
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Maybe this also implies they gonna Open Source VP7 now
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all my compares are riddles so please try to decipher them yourselves :) It is about Time Join the Revolution NOW before it is to Late ! http://forum.doom9.org/showthread.php?t=168004 |
16th September 2008, 09:58 | #18 | Link |
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VP4's decodable in ffmpeg, yes no? As is VP5, yes no?
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16th September 2008, 16:19 | #19 | Link |
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Most likely this is thanks to the reverse engineering capabilities of the ffmpeg developers, not thanks to On2...
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