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4th July 2017, 15:37 | #241 | Link |
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And after bitstream freeze I dream of others encoders like ffav1 ( ffmpeg team ) or xav1 ( like x264 ) with multi-threading and a lot of asm optimizations to enable better competition .
Last edited by easyfab; 4th July 2017 at 15:40. |
4th July 2017, 16:04 | #242 | Link |
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I am hoping that they will not rush out a bitstream with flaws in it. If it takes a bit longer than 2017 I guess that would be fine, since these codecs have much longer lifespans than companies like Google would like (remember the whole "every year a new codec" thing).
MP3 is still being used and progress in codecs is slowing gradually. Only so much Information can be crammed into a small file size. Getting this codec right the first time would be great. |
5th July 2017, 06:53 | #244 | Link | |
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5th July 2017, 08:15 | #245 | Link | |
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(Are they still doing the limited range nonsense too?) |
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5th July 2017, 09:56 | #247 | Link | |
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The alternative: no subsampling. Let the encoder reduce color information in a more evolved way. An immediately obvious possibility is that you could change how color/luminosity is stored adaptively. eg: when there's only the sky on the picture why dump half the color information for the blue range of the spectrum even before it reaches the encoder? Why "keep" anything for the red range? (The only color is blue, or white/grey aka no-color) |
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5th July 2017, 10:00 | #248 | Link |
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Can we not repeat this discussion every couple months? You can't force content producers on a technical level, they'll just not use the codec then. Convince them that they want to use 4:4:4 or RGB, not that they have to.
Additionally, a lot of content already exists that is already subsampled. Being forced to upsample that before encoding isn't going to do anyone any good, and as such a codec that can't encode a vast amount of existing content is not going to see adoption. Its as simple as that.
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LAV Filters - open source ffmpeg based media splitter and decoders |
5th July 2017, 16:55 | #249 | Link |
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Hey guys,
I've updated my image comparison website, now you can compare AV1 from oct 2016 to AV1 from now. You can see the changes in metrics here: http://wyohknott.github.io/image-for...omparison.html |
6th July 2017, 14:11 | #250 | Link | |
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Woah! Ninja?! http://nwgat.ninja/ (AV1 Overview) "Not available in your region" has now been redefined as "Go Pirate, you filthy scum" Nwgat |
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8th July 2017, 10:49 | #252 | Link |
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I've updated all the codecs and added VP9. I also fixed some erroneous numbers. VP9 is doing pretty good, but I don't think we will see anyone making it an image codec. The guys doing WebP can't change codec because it would modify their bitstream and all efforts to be integrated in browsers would go to waste.
BPG is based on HEVC, although it's an older revision, I've tried a more recent git revision from x265 and there's no real gain. Nice blog btw. |
15th July 2017, 16:52 | #254 | Link |
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did anyone post these?
https://parisvideotech.com/wp-conten...ch-meet-up.pdf (English Slides) https://www.youtube.com/watch?v=PVUIBbb-WcE (French https://www.youtube.com/watch?v=t0oVlYcDAxM (French)
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Woah! Ninja?! http://nwgat.ninja/ (AV1 Overview) "Not available in your region" has now been redefined as "Go Pirate, you filthy scum" Nwgat Last edited by wiak; 15th July 2017 at 17:08. |
16th July 2017, 09:25 | #256 | Link |
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@Zebulon84
18 months is for the very first products if I understand correctly. And not all HW devices are planned to have it in the next generation, Apple now support HEVC, Qualcomm is not ( yet?) in the alliance... if AV1 succeed against HEVC, It will take a long time for the adoption Like Jean-Yves Avenard from Mozzila said : H264 will still be used for a very long time. I think like for VP9 the first usage will be for youtube on desktop, perhaps Netflix. but I hope the decoding will make progress, for now it's 3 times slower than VP9 and they target 2 times slower in the 6 months after bitstream freezing. What CPU will be needed to decode 4K ? |
20th July 2017, 18:02 | #258 | Link |
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The coding complexity is going through the roof. It would be nice they keep it reasonnable otherwise only big companies like Netflix or Google will be able to encode on their server. I'm running an encode and the eta is 15-20 days.
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20th July 2017, 20:29 | #259 | Link | |
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1. not started optimzing for SIMD yet 2. no multi-threading yet
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