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Old 27th April 2018, 17:21   #661  |  Link
wiak
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fresh build today
https://awesome.nwgat.ninja/av1/av1-...nwgat.ninja.7z
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Old 29th April 2018, 09:03   #662  |  Link
LigH
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AOM 0.1.0-9348-g589bae879
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Old 29th April 2018, 12:31   #663  |  Link
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So, a month passed since the (not quite true) news about the bitstream being frozen. Are they closer at least?
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Old 29th April 2018, 13:54   #664  |  Link
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Originally Posted by mzso View Post
So, a month passed since the (not quite true) news about the bitstream being frozen. Are they closer at least?
Yes, they are much closer now, as it was last month, and early this year, and late last year......

/s

Honestly, I think it is actually good they delay it. The one thing you don't want is a standard being rushed.
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Old 29th April 2018, 23:38   #665  |  Link
wiak
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finally newer git builds decode older av1 encoded files, yey for progress
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Old 8th May 2018, 21:38   #666  |  Link
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Originally Posted by Shevach View Post
In HEVC/AVC the maximal probability of a symbol is ~0.98 and hence the number of bits produced by encoding a symbol having the maximal probability is -log2(0.98) = ~0.02 bits.
Let's suppose that we know ahead that all MBs will be no-skipped (i.e. skip_flag = 0 for each MB) and consequently the skip_flag syntax element gets maximal probability 0.98. In such case the total number of bits consumed by all skip flags is ~0.02 x Number_Mbs.
For example, HD resolution frame has usually 8100 MBs (16x16 grid) and hence the total size of all skip_flag syntax elements is ~8100 x 0.02 = 162 bits. It's negligible in most cases.
Probably AV1 frame level parameter 'skip_mode_present' (to disable transmission of skip flags) has a minimal impact on coding efficiency, although it increases the decoding complexity (more 'if-else').
For AV1 it's even smaller, 1/65535 of a bit. However you'll need do adapt to that probability, so you'll burn more bits at the beginning of a frame. That said, the skip_mode_present doesn't control the skip flag but rather the skip_mode flag, which itself is a way to signal that you're going to use a "default" predictor. Still, the gains are pretty small, it's more of a speed savings to not have to code this flag if it's unused.
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Old 9th May 2018, 09:03   #667  |  Link
wiak
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hey TD-Linux fancy meeting you here and in other news mpv windows builds finally has av1 decoding
https://sourceforge.net/projects/mpv...s/files/64bit/
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Old 9th May 2018, 09:33   #668  |  Link
LigH
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The media-autobuild_suite can help you building your up-to-date mpv as well, based on ffmpeg sources. So if mpv can play it, then ffmpeg may handle it as well? ... Yes:

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 DEV.L. av1                  Alliance for Open Media AV1 (decoders: libaom-av1 ) (encoders: libaom-av1 )
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Old 9th May 2018, 09:45   #669  |  Link
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Until the bitstream is actually finally frozen, excitement about inclusion in software seems misplaced, since any current binary may not work anymore tomorrow. That should always be kept in mind.
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Old 9th May 2018, 11:17   #670  |  Link
mzso
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Until the bitstream is actually finally frozen, excitement about inclusion in software seems misplaced, since any current binary may not work anymore tomorrow. That should always be kept in mind.
Well, it already can't play a few av1 encodes from a few weeks ago.
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Old 15th May 2018, 12:06   #671  |  Link
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https://twitter.com/bitmovin/status/996084579952836608
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Old 15th May 2018, 20:28   #672  |  Link
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https://streaminglearningcenter.com/...ix-on-av1.html

Ronca: "We think that initial AV1 computational complexity of 4-10x vs. libvpx would be usable in production. There is a lot of work underway to improve the performance, and we are hopeful that the performance goals will be achieved."
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Old 16th May 2018, 22:54   #673  |  Link
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Well, it already can't play a few av1 encodes from a few weeks ago.
Seriously? That sounds like it's really not ready for prime time.
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Old 16th May 2018, 23:30   #674  |  Link
nevcairiel
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Seriously? That sounds like it's really not ready for prime time.
Its quite simply not done yet. We keep repeating that here regularly.
Until its finalized, noone should be using it outside of experimentation/testing.
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Old 17th May 2018, 07:35   #675  |  Link
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Its quite simply not done yet. We keep repeating that here regularly.
Until its finalized, noone should be using it outside of experimentation/testing.
I got the impression from the news announcement that they'd frozen some element of the design, which was a big milestone?

I (wrongly?) assumed, it would just be optomisations and performance from here on out.

I look forward to it dominating, but maybe it's going to be several years?
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Old 17th May 2018, 09:01   #676  |  Link
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Actually from why I heard AV1 is frozen at the level of features, now they are working out implementations bugs and the only thing that is really work on is the bitstream.
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Old 17th May 2018, 19:32   #677  |  Link
Blue_MiSfit
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^^ Where did you hear this?
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Old 19th May 2018, 13:23   #678  |  Link
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^^ Where did you hear this?
More that heard is read as it was in a discusion on IRC but I'm not sure on the channel.

Last edited by Phanton_13; 19th May 2018 at 13:27.
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Old 19th May 2018, 16:25   #679  |  Link
bstrobl
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More that heard is read as it was in a discusion on IRC but I'm not sure on the channel.
https://freenode.logbot.info/aomedia/20180514
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Old 19th May 2018, 18:26   #680  |  Link
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I wish they'd taken a look at the eighth-pel issue before going into informal feature freeze, that's going to completely hamstring 4K adoption and probably hurt even at 1080p. Just performing the equivalent search as AVC or HEVC will take so much longer, just due to much higher memory pressure, even if you pretend it's q-pel and only look at every other pixel.
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