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17th May 2021, 21:48 | #2401 | Link | ||
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18th May 2021, 21:04 | #2402 | Link |
German doom9/Gleitz SuMo
Join Date: Oct 2001
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New uploads: (MSYS2; MinGW32 / MinGW64: GCC 10.3.0)
AOM v3.1.0-220-g5b35124c3 rav1e 0.5.0-alpha (df8b712b / 2021-05-16) dav1d 0.9.0-0 (g8636b4f / 2021-05-16) avif 0.9.0_917cc2c dav1d [dec]:0.9.0-0-g8636b4f, aom [enc/dec]:3.1.0-218-ga862e2058, rav1e [enc]:0.5.0-alpha (p20210511-46-gdf8b712b) |
20th August 2021, 17:41 | #2403 | Link | |
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Natural gas plants emit about 1 pound of CO2 per kWh, so 1,000 lbs per MWh. I'm being generous and overestimating it a bit – it's more like 0.9 and 900 lbs. (Source: https://www.eia.gov/tools/faqs/faq.php?id=74&t=11) But being conservative, this amounts to 5,000 lbs of CO2 from 5 MWh. You said a "megaton". That's a million tons. The actual figure is less than 2.5 tons. Big difference. And your 5 MWh figure is wrong if you're basing it on the 20 watt difference you mentioned. 20 watts × 500,000 people × 1 hour = 10 MWh, not 5. So we're up maybe 5 tons now, compared to the 1,000,000 tons you claimed. Moreover, no numbers here would be relevant to a rational knower without some context that made them relevant. You committed the Large Number Fallacy, which is just to handwave with large, or large-sounding, numbers like a million, megatons, etc., without providing any information that would make those numbers relevant to the non-gullible. In this case, the fallacy is heightened because a megaton of CO2 is trivial in the context of Earth's climate – there are well over 1,000 gigatons of CO2 in Earth's atmosphere, so a single megaton isn't going to matter much, even if it was hourly. Of course, your megaton claim was off by a factor of 200, so the actual amount definitely doesn't matter. Ideologies and religions reliably corrode people's grip on reality. Caring about mild, long-term climate change predictions is definitely optional, and probably irrational. False inflated stats only serve to amplify the irrational impulses and arbitrary abstractions that are already doing harm. In any case, don't assume everyone else subscribes to your religion, or that everyone is obligated to conform to its dictates. |
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5th September 2021, 02:44 | #2404 | Link | |
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Posts: 203
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AV1: Still The Current Future Of Video
https://blog.xaymar.com/2021/08/19/a...ture-of-video/ Quote:
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5th September 2021, 09:12 | #2405 | Link | |
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Sorry. |
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10th October 2021, 10:14 | #2406 | Link |
Artem S. Tashkinov
Join Date: Dec 2006
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AV2 is already showing serious bitstream savings: https://ottverse.com/av2-video-codec-evaluation/
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13th October 2021, 00:34 | #2407 | Link | |
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Which is totally fine at such an early state of development. This is all fixed QP, fixed-GOP, no rate control testing comparing the averages of per-frame scores. It's nearly impossible to extrapolate from this early stage what real world savings might be like in practice. I'm sure AV2's gains over AV1 will be >>7%, but we won't know how it compares to VVC in practice until a couple of years after the AV2 standard is completed. |
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15th October 2021, 15:21 | #2408 | Link |
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Libaom v3.2.0
This release includes compression efficiency and perceptual quality improvements, speedup and memory optimizations, as well as some new features. - New Features * Introduced speeds 7, 8, and 9 for all intra mode. * Introduced speed 10 for real time mode. * Introduced an API that allows external partition decisions. * SVC: added support for compound prediction. * SVC: added support for fixed SVC modes. - Compression Efficiency Improvements * Intra-mode search improvement. * Improved real time (RT) mode BDrate savings by ~5% (RT speed 5) and ~12% (RT speed 6). The improvement was measured on the video conference set. * Improved real time mode for nonrd path (speed 7, 8, 9): BDrate gains of ~3-5%. * Rate control and RD adjustments based on ML research in VP9. Gains of ~0.5-1.0% for HD. - Perceptual Quality Improvements * Added a new mode --deltaq-mode=3 to improve perceptual quality based on a differential contrast model for still images. * Added a new mode –deltaq-mode=4 to improve perceptual quality based on user rated cq_level data set for still images. * Weighting of some intra mode and partition size choices to better manage and retain texture. - Speedup and Memory Optimizations * Further improved 2-pass good quality encoder speed: o Speed 2 speedup: 18% o Speed 3 speedup: 22% o Speed 4 speedup: 37% o Speed 5 speedup: 30% o Speed 6 speedup: 20% * Optimized the real time encoder (measured on the video conference set): o RT speed 5 speedup: 110% o RT speed 6 speedup: 77% - Bug Fixes * Issue 3069: Fix one-pass mode keyframe placement off-by-one error. * Issue 3156: Fix a bug in av1_quantize_lp AVX2 optimization. |
20th October 2021, 19:11 | #2409 | Link |
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Looks like a good point release, particularly for real-time encoding.
I do get nervous about deltaq modes based on still image research, though, as still-image algorithms generally need some tweaking for use with moving images. |
20th October 2021, 20:03 | #2410 | Link | |
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Still image research is not done for motion prediction residuals, for example my wavelet codec (NHW) puts forward neatness of (natural) images, but I don't know if it'll work as-is with inter-frame residuals which have completely different properties.-It would be challenging (for me) to know if wavelet image codecs could be effectively tuned to work well with a motion prediction scheme and its residuals-... Btw, I'm also waiting eagerly to evaluate this new version of AV1 in AVIF. Cheers, Raphael |
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22nd October 2021, 04:24 | #2412 | Link | |
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The dream is to have those auto-adapt to the content instead of having to pick the least-wrong one for an entire title. |
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1st December 2021, 20:53 | #2413 | Link | |
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What is going on with AV1, why is there such a lacklustre support from some major players? |
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2nd December 2021, 00:59 | #2414 | Link | |
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Although I do think Qualcomm would support it next year along side with VVC. The A14 is capable of software decoding 4K AV1 under 1 watts. So if google really want to push it there is no reason why they cant turn on AV1 support on A15 or A16 with software update. But for reference the same 4K on VP9 and HEVC would only require ~150mW on Hardware decoder.
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Previously iwod Last edited by ksec; 2nd December 2021 at 01:10. |
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2nd December 2021, 23:47 | #2415 | Link | |
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And watching 2 hour movie, just one extra watt on a phone can materially reduce battery life. YouTube, delivering non-DRM'ed, shorter clips with a much lower quality expectation, can use SW decode where streaming service providers like Netflix and Disney+ cannot. |
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7th December 2021, 01:54 | #2416 | Link | |
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15th December 2021, 17:33 | #2417 | Link |
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Location: Canada
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What are you talking about?
Most of the people working on AV1 are indeed paid developers by Google, Netflix, Facebook, Visonular, Videolan, Two-Orioles, Intel, etc. Last edited by BlueSwordM; 15th December 2021 at 19:10. Reason: EVE is a product, not a company :P |
30th December 2021, 11:39 | #2418 | Link | |
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OBS Studio 27.2 Beta 1
https://github.com/obsproject/obs-st...g/27.2.0-beta1
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7th January 2022, 01:13 | #2419 | Link |
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Hmm. I thought AV1 would be further along by now. Did an encode with ffmpeg "-c:v libaom-av1 -crf 35 -cpu-used 3 -tiles 4x3 output.mkv" The output was almost the same size as libx264 -superfast at crf 18. But it took a lot longer and it looks worse.
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8th January 2022, 02:32 | #2420 | Link |
Derek Prestegard IRL
Join Date: Nov 2003
Location: Los Angeles
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Something is going wrong then. libaom and svt-av1 absolutely crush x264 at equivalent bitrates as long as you're not using the fastest possible speed presets.
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