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3rd June 2013, 12:20 | #1 | Link |
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Xiph & Mozilla's Daala codec
Just thought i'd start a generic thread since there doesn't seem to be one yet.
A bit late with this news but apparently there was a get-together last week to "start moving our Daala project from a research platform to a working codec prototype" http://www.ietf.org/mail-archive/web.../msg00141.html Some of the work/discussion can be found here: https://daala.etherpad.mozilla.org/coding-party Last edited by dapperdan; 3rd June 2013 at 12:21. Reason: link |
4th June 2013, 01:04 | #3 | Link |
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It is still in a very alpha stage and the format is not frozen by far. Apparently though you can already test the proto-encoder and decoder. It already does inter prediction, but no scenecut detection and various other features (like rate control) aren't in yet. But I really don't have much insight into it, so you'll have to wait for somebody more relevant to describe the state...
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4th June 2013, 04:11 | #5 | Link |
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Note that my "very alpha" comment and the words about limited features having been implemented - all that is about the example encoder/decoder.
AFAIK they have the format's coding schemes laid out for a long time now, so while it has not been yet finalised and still being investigated, it is not like the format design is at the beginning. |
5th June 2013, 17:22 | #6 | Link | |
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For myself personally, I start really paying attention to codecs when I can actually make and playback a bitstream that doesn't something notable and new. It sounds like Daala is at least a couple years out from being able to do a real end-to-end test of a reasonably complete implementation of a reasonably final bitstream spec. |
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21st June 2013, 01:16 | #7 | Link |
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Xiph foundation has published a presentation about the codec (or rather it seems to be the first in a line of writeups that will follow...). It's be mainly about the lapped transform that is used in the codec.
http://people.xiph.org/~xiphmont/demo/daala/demo1.shtml |
12th August 2013, 23:29 | #8 | Link |
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A third one is out too:
http://people.xiph.org/~xiphmont/demo/daala/demo3.shtml |
13th August 2013, 19:04 | #9 | Link |
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Okay. Now I'm thinking that Daala might actually turn into something brilliant. I've been thinking about the frequency domain prediction approach for a while now, and it's great to see some real evidence. TrueMotion prediction turning into a texture replicator after machine learning suggests some very powerful techniques that could be refined out of that.
I need to lie down and meditate on the potential implications of a lapped TF for video... |
14th August 2013, 10:34 | #10 | Link |
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"Mozilla is organizing a coding party for Sept 30 - Oct 3 at the Mozilla headquarters in Mountain View to continue moving the Daala project further forward as a working codec prototype. Anyone and everyone are welcome to come hack on things."
http://www.ietf.org/mail-archive/web.../msg00143.html Also, Monty's blog introducing the 3rd write-up that was linked above, suggests the second stage of the TF was discovered while documenting the first, which is interesting. http://xiphmont.livejournal.com/60856.html |
29th October 2013, 10:44 | #13 | Link |
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A video of a talk by one of the Daala team, on the topic of Daala and Opus:
http://people.xiph.org/~xiphmont/vid..._and_Daala.ogv Fairly high level, but up-to-date with their progress. Last edited by dapperdan; 29th October 2013 at 11:36. |
29th October 2013, 19:51 | #14 | Link |
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Hmm, videos require one to watch through them, unpleasant when you want to quickly extract the information
I wish people would return to *writing* reports... /well, I guess for that I need to wait for more Xiph demos./ Last edited by mandarinka; 29th October 2013 at 20:01. |
6th November 2013, 05:11 | #15 | Link | |
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13th November 2013, 10:05 | #19 | Link |
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Zero, at this stage daala is almost entirely theoretical. To my knowledge there has not been a single draft released for it yet, where VP9 is finished and h265 is in the final drafting stages.
Don't expect anything for a couple years yet. |
13th November 2013, 10:37 | #20 | Link |
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Just FYI, H.265 has been a finished specification since April 2013. Range Extensions (>4:2:0 and >10bit support) as well as other additions to the first specification are what are still in draft, and there should be a final ballot on these early next year.
Funny enough, the ISO/IEC still hasn't finalized the same format on their side, but that seems like an issue with bureaucracy. And yes, Daala is a research project, and you should not expect much from it other than very interesting ideas and test implementations. If we get a nice video format with quite a few new ideas along the road in a few years, that's just extra .
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