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Old 30th September 2015, 11:47   #21  |  Link
nevcairiel
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Dolby Vision is annoying, they should stick to the HDR metadata that UHD Blu-ray favors (SMPTE ST- 2084/2086). It needs far less decoder changes.
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Old 30th September 2015, 14:50   #22  |  Link
kolak
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Dolby Vision won't catch up, as it cost to much money in licensing.
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Old 4th February 2016, 15:41   #23  |  Link
dapperdan
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Apparently work has begun:

https://chromium.googlesource.com/webm/aom/
https://chromium-review.googlesource...oject:webm/aom

Mostly based on VP9/10 to start with.
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Old 5th February 2016, 23:24   #24  |  Link
benwaggoner
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Quote:
Originally Posted by nevcairiel View Post
Dolby Vision is annoying, they should stick to the HDR metadata that UHD Blu-ray favors (SMPTE ST- 2084/2086). It needs far less decoder changes.
The 2086 metadata is static across an entire title, so it still requires a lot of prediction and MIPS for a display's tone mapper to adapt to per-scene changes in color volume or contrast.

And it's really not that valuable. A single flash frame from a camera flash can double the MaxFALL the whole rest of the title would use, and thus be very misleading for a tone mapper.
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Old 5th April 2016, 22:01   #25  |  Link
Nintendo Maniac 64
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AMD, ARM, and Nvidia have joined, and because it apparently wasn't established before, this new upcoming in-development video codec will be an open-source project:
http://aomedia.org/press-release/the...and-announces/

Hopefully AMD will finally implement VP9 hardware decoding on their upcoming APUs and GPUs...

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Old 5th April 2016, 22:18   #26  |  Link
mandarinka
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All reference encoders/decoders are open source (H.264, H.265, VP8/9), so that was obvious. The distinction was never in open versus closed source anyway.

After all the development model is more or less the same, but probably with faster development and less testing/reviewing than the MPEG guys do, if libvpx traditions are any sign. So possibly there will again be few bugs in the frozen specification, like VP9/VP8 had

The only difference between these "libre" (or whatever term is currently in) codecs and H.264/H.265/... is really in the patent licensing requirements and usage royalties.
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Old 6th April 2016, 12:55   #27  |  Link
dapperdan
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I don't think they're announcing that it's open source, but that it is available and mentioning in passing that it's open source. Though I think it's actually been available already, so this is just an official announcement that it's available.

In other oddities, the new members are being given "founder member" status, even though they're joining a while after the others.

Finally, the link seems to point just to the patent licence info (possibly the page will be updated to point to the actual code) but it appears to live here:

https://aomedia.googlesource.com/aom/

A notably non-impartial place to host the code I would have thought, though it's all git in the end.
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Old 7th April 2016, 01:08   #28  |  Link
Nintendo Maniac 64
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In other oddities, the new members are being given "founder member" status, even though they're joining a while after the others.
Well they're all chip hardware designers...Intel was the only chip hardware designer that was a member, so there could have very well been several more "vacancies" for other chip hardware designers as well.

In other words, maybe because Intel was previously the only chip hardware designer, the group as a whole left the door open for other chip hardware designers?
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Old 10th April 2016, 03:47   #29  |  Link
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AMD, ARM, and Nvidia have joined,
Interesting, seems like they got the hardware support largely covered with these new members.
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Old 13th April 2016, 13:44   #30  |  Link
mandarinka
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http://www.streamingmedia.com/Articl...ticleID=110383

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When will the codec ship? The group is aiming to freeze the bitstream sometime between the end of the 2016 and March 2017. Expect to see browser-based support soon thereafter, with the first hardware support within 12 months after that.
On the one hand that is soon, on the other hand this is not much time for research/development. Hopefully it won't have bugs in spec this time, but this probably means they will have to stick with most of libvpx since that is what AV1 its currently built upon, and other IP will only be patches on the top.
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Old 13th April 2016, 18:34   #31  |  Link
Clare
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Originally Posted by mandarinka View Post
http://www.streamingmedia.com/Articl...ticleID=110383



On the one hand that is soon, on the other hand this is not much time for research/development. Hopefully it won't have bugs in spec this time, but this probably means they will have to stick with most of libvpx since that is what AV1 its currently built upon, and other IP will only be patches on the top.
Both Daala and AV1 are already well advanced if one looks at AWCY:
https://arewecompressedyet.com/?r%5B...&s=ntt-short-1

Also, the VP10 basis it is built upon does not seem to take all development happening in the nextgenv2 branch. So they could potentially add more feat. already developed from VP10 later.

I'm more concerned at the processing power needed for encoding.
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Old 13th April 2016, 21:20   #32  |  Link
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Speed is inconsequential IMHO, even if it was 2-4x+ as slow as optimised HEVC or VP9 encoder, that would be soemthing that would be solvable - if by nothing else, by throwing more CPU cores there.

My fear is that the problems are going to be the same as with VP8/VP9 and (to a lesser degree, it has matured somewhat) x265: the encoder will be too fresh, too crude, without good rate control and lacking in utilisation of the new compression tools. The advances of format will be probably negated by poor quality encoder. This problem is hard and practice shows it takes years to improve. I think CPU requirements are nothing compared to that.
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Old 25th April 2016, 19:53   #33  |  Link
wiak
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did some testing
https://nwgat.ninja/test-driving-aomedias-av1-codec/
http://screenshotcomparison.com/comparison/170492
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Old 25th April 2016, 21:21   #34  |  Link
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That nicely noisy output, is that with PVQ enabled? (IIRC Daala guys worked on porting it to AV1.)
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Old 26th April 2016, 16:20   #35  |  Link
wiak
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That nicely noisy output, is that with PVQ enabled? (IIRC Daala guys worked on porting it to AV1.)
i dont think so, i did a mirror of the aom googlesource git repo to github for simpler reading
https://github.com/nwgat/aom/search?...r+Quantization
https://github.com/nwgat/aom/search?...=PVQ&type=Code
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Old 29th April 2016, 08:13   #36  |  Link
Jamaika
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Could someone compile the latest codec AOM?

PS Is the job suspended on the development of the codec? I don't see updates.
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Old 29th April 2016, 13:40   #37  |  Link
dapperdan
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The main repo is currently here:

https://aomedia.googlesource.com/aom/

which has more recent commits, though nothing in the last couple of weeks
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Old 2nd May 2016, 21:10   #38  |  Link
mzso
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Isn't there some information about the internals of this codec? Does it have something innovative like lapped transfrom (was supposed to be) for Daala.
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Old 3rd May 2016, 11:04   #39  |  Link
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Isn't there some information about the internals of this codec? Does it have something innovative like lapped transfrom (was supposed to be) for Daala.
I haven't seen any documentation, likely because the development is still in a 'let's try everything' phase, with the bitstream being locked down by the end of the year (at the earliest).

Also there are a lot of different branches where work is being done, here is a branch with Daala techniques being tested:

https://chromium-review.googlesource...oject:webm/aom

Here is what I believe is the official AOM branch:

https://aomedia.googlesource.com/aom/

And here is the 'nextgenv2' branch, where there's a lot of work done at a rapid pace:

https://chromium.googlesource.com/we...+log/nextgenv2
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Old 3rd May 2016, 13:22   #40  |  Link
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I was thinking more in the vein of the Daala demos. About roughly what novel/innovative ideas they have in the air. (If they have any)
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