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16th September 2018, 00:10 | #962 | Link | |
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Hmmm, makes me think... Doom9 has this in its forum rules: "There is no best". It's not a straightforward "video truth" (heh), but the reason behind it most likely has a connection exactly with this case. In video processing/compression, you usually don't have an absolute correct and final answer that is true always, regardless of context. Personally I agree with it that there is not one best aq-strength, psy-rdo, crf and so on. IMHO it's going to happen with Rav1e options too. |
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16th September 2018, 07:17 | #963 | Link |
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Since when feeding 10bit yv12 with profile I get:
Code:
Profile 2 bit-depth < 10 requires 4:2:2 color format What color sampling and bit depth combinations are supported in which profile when using aomenc? Cu Selur |
16th September 2018, 07:39 | #964 | Link |
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You should be using Profile 0 (Main) for 10-bit 4:2:0 for maximum compatibility.
The general AV1 rules are pretty simple: Main Profile (0) is 8/10-bit 4:2:0 or Monochrome (4:0:0) High Profile (1) is 8/10-bit 4:2:0, 4:4:4, Monochrome Professional Profile (2) is 8/10/12-bit, 4:2:0, 4:2:2, 4:4:4, Monochrome I would assume that the encoder follows the same rules - and judging by that message it even enforces the "use the lowest profile possible" suggestion? I don't know right off the top of my head if the profiles actually influence anything else beyond the bitdepth/chroma, but I don't think so, which gives you little to no reason to use a higher profile when you don't need its chroma/bitdepth extensions.
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LAV Filters - open source ffmpeg based media splitter and decoders Last edited by nevcairiel; 16th September 2018 at 07:45. |
16th September 2018, 08:54 | #965 | Link | ||
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16th September 2018, 09:07 | #966 | Link | ||
Angel of Night
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16th September 2018, 14:32 | #967 | Link | |
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Ronald Bultje is making the decoder?!! So we will have the worlds fastest AV1 decoder soon https://blogs.gnome.org/rbultje/2014...decoder-ffvp9/ |
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16th September 2018, 15:23 | #968 | Link | |
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As for the rest of bitrates they use Vorbis and LC-AAC. There is no quality benefit from xHE/HE-AAC codec at higher rates. Add to it that Vorbis is free and LC-AAC patents will expire in 2 years. https://support.spotify.com/us/using...ity-streaming/ That's a decoder. There is still no any encoder (and it won't be) Remember MPEG surround format? It's 11 years old ... with zero adoption. xHE-AAC goes a same road with its 6 years of 'unadoption'. After MP3 and (HE)AAC none of a new mpeg audio format has seen any meaningful adoption. Last edited by IgorC; 16th September 2018 at 15:37. |
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17th September 2018, 09:48 | #969 | Link |
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ffmpeg 2018-09-13 zeranoe build
Code:
ffmpeg -threads 4 -i 1080.mp4 -benchmark -f null - ffmpeg version N-91943-g1b98bfb932 [libaom-av1 @ 000001e19c898940] 1.0.0-507-g5d963cb57 frame= 1736 fps= 19 q=-0.0 Lsize=N/A time=00:00:57.92 bitrate=N/A speed=0.637x bench: utime=88.703s stime=0.938s rtime=90.919s bench: maxrss=233580kB Code:
ffmpeg -threads 4 -i 1080.mp4 -benchmark -f null - ffmpeg version N-91961-g5109c38162 [libaom-av1 @ 000001b015cfd8c0] 1.0.0-590-g6fa400604 frame= 1736 fps= 34 q=-0.0 Lsize=N/A time=00:00:57.92 bitrate=N/A speed=1.15x bench: utime=100.594s stime=2.812s rtime=50.395s bench: maxrss=274472kB |
17th September 2018, 14:24 | #970 | Link | |
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https://phabricator.wikimedia.org/T166025 Which state LC-AAC to be patents free in 2018! This is big news. |
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17th September 2018, 19:37 | #971 | Link | |
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17th September 2018, 19:51 | #972 | Link |
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In general, generalizations are wrong... "no-one" is a strong assumption without proof over the whole population of earth using technology compatible to LC-AAC already (e.g. iTunes).
If you don't care about AAC, it's your choice. But don't assume about anyone else. |
18th September 2018, 08:53 | #974 | Link |
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Can doom9 promote AV1 and give an sub-forum like for HEVC?
So we can have more specialized threads: AV1
Last edited by marcomsousa; 18th September 2018 at 13:29. |
18th September 2018, 08:57 | #975 | Link | |
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I can't see it becoming popular online due to the patent costs especially as Opus 1.3 has improved lower bitrates recently and will continue to improve. |
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18th September 2018, 11:14 | #976 | Link | |
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News goes in the news forum, naturally. |
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18th September 2018, 13:59 | #977 | Link |
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OK. Possibly only for now, though ? A novice like me and perhaps most punters may have reasonably inferred that with google and so many (almost all ?) large industry players signed up and behind it that it is likely to receive growing attention. Just a thought.
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18th September 2018, 18:09 | #978 | Link | |
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Sorry for offtopic. Last one and probably will get it somewhere else.
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Especially when laws change per country. Also there are decoding and encoding related patents. MP3 decoding related patents have expried in 2015 but encoder patents in 2017. https://www.cs.helsinki.fi/group/pak...docs/legal.pdf It might be the case that patents of LC-AAC have already expired. Will investigate. |
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18th September 2018, 23:49 | #979 | Link | |
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Thing is, I saw no performance gains when using 1.8.2 vs 1.8.1, so I need to confirm/deny whether my performance issue is persisting or whatnot. I did however notice that, out of the three cores being utilized on my Xeon x3470, one of them is pretty much fully pegged and the other two are about half utilization - this would then equal the ~25% utilization I'm seeing. Now normally I would let this all go as simply a case of "not having fast enough single-threaded performance" and be done with it, but the fact that you and others were seeing over 60% utilization on your own 4c/8t CPUs (which implies it was balancing the load across more than 4 threads) makes me thing something still isn't quite right here - I mean, weaker single-threaded performance shouldn't result in fewer threads being utilized, and if anything you'd want it to be the opposite, no? |
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19th September 2018, 11:58 | #980 | Link |
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I downloaded aom-master.tar.gz (that is, the latest sources), recompiled libaom amd ffmpeg libs myself, and I cannot see speed increase over vanilla LAVFilters-0.72.0-13.
Also: according to LAVFilters sources, it uses AV1 library v1.0.0-552-gbb82e05fb which does have that "row-based multi-thread decoding" patch. |
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