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6th July 2013, 06:23 | #221 | Link | |
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MinGW has to be installed of course, which is possible through cygwin's installer. |
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6th July 2013, 07:33 | #222 | Link | |
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http://forum.doom9.org/showpost.php?...29&postcount=6 |
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7th July 2013, 01:45 | #223 | Link |
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I have done some tests on VP9 VS VP8 on youtube, meaning there own encoded material.
And from that, i can say that VP8 looks better then VP9. Now, i donīt know what bitrate VP9 uses, as i canīt download it. If anyone knows a way to download the VP9 encoded videos from Youtube, please tell. |
7th July 2013, 21:02 | #224 | Link | |
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7th July 2013, 22:10 | #226 | Link | |
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Join Date: Jun 2013
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https://www.youtube.com/user/WebMVP9/videos Those videos were not encoded with the final bitstream. You can download VP9 versions by parsing the output of: Code:
https://www.youtube.com/get_video_info?video_id=VIDEO_ID |
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7th July 2013, 23:45 | #228 | Link | |
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Instantaneous MS-SSIM bitrate gap versus QP32 HEVC is +25% filesize for basketballdrive (bitstream, side-by-side download) and +30% filesize for cactus (bitstream, side-by-side download). Personally, I think I've lost interest in the next-gen "codec war" until we can find scenarios that seem nuanced at the very least. (By the way, the bitstreams work perfectly on Chrome dev branch, and the side-by-sides had their frame rates reduced to 24.) |
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8th July 2013, 00:06 | #229 | Link | |
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Could you record some 3d game lossless, and encode it in vp9 and hevc?
I donīt mean a whole session, but you know, some secs. As it would be nice to see some, Unencoded material being encoded and compared. Quote:
I have to agree there. I was extremely excited with VP9, i have been waiting for it with high hopes. But i canīt say i am impressed, but i still have a bit of hope |
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8th July 2013, 00:17 | #230 | Link | |
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Assuming you replaced VIDEO_ID with the video id, you will get a file with url-encoded text. You need to escape/unquote the text (you might need to do that twice depending on the method you use for this). Now, reading the (escaped) text should be easier, search for vp9, then copy the following url (what comes after url=) until and including the signature parameter. That's the video url. |
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8th July 2013, 04:11 | #232 | Link |
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Okay i tested myself, so here is a picture from the same source, which was lossless, and i encoded in vp9 1 pass -good -target 1000bitrate (but it was 300bitrate in the end for some reason)
So the x264 encode was 2 pass and 300bitrate, default slower preset. The difference is significant, itīs night and day And hopefully, i did things right. EDIT: Forgot, the x264 i encoded is 10bit, so it has a bit of advantage there, especially as this is a dark clip. Last edited by zerowalker; 8th July 2013 at 04:15. |
8th July 2013, 21:20 | #234 | Link | |
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For my vp9 tests I used settings I picked up on the webm mailing list which I recall some dev said is what they are typically using: vpxenc --best --cpu-used=0 --threads=0 --profile=0 --lag-in-frames=25 --min-q=0 --max-q=63 --end-usage=vbr --auto-alt-ref=1 --passes=2 --kf-max-dist=9999 --kf-min-dist=0 --drop-frame=0 --static-thresh=0 --bias-pct=50 --minsection-pct=0 --maxsection-pct=2000 --arnr-maxframes=7 --arnr-strength=5 --arnr-type=3 --sharpness=0 --undershoot-pct=100 --codec=vp9 --target-bitrate=BITRATE -o <output video> <input video> |
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8th July 2013, 22:40 | #235 | Link |
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I didnīt do a precise test, it was just more to check if it is noticable at all.
And with that encoding i did, x264 had alot of advantages. 2Pass and 10 Bit, and it still looked way worse than VP9. Which means, x264 will look even worse with the same settings as vp9 right? And if i did use 2 pass, it would have taken like 5 hours, for 2 secs, which isnīt that great;P will have to wait till they improve it to atleast 1fps and not 0.005 EDIT: Also, is there a directshow filter/decoder for vp9? As i need to watch in chrome, which is not that nice. |
9th July 2013, 01:47 | #236 | Link | |
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--tune film may have also helped with that content. Can you share the full x264 command line you used? The quality seems less than it should be for even that bitrate, unless there is a crazy lot of motion or something. |
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9th July 2013, 01:52 | #237 | Link |
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True, but i really doubt it would make a real difference.
Tune Film might though. here: program --preset slower --pass 2 --bitrate 300 --stats ".stats" --output "output" "input" It was a lot of movement i guess, it was a third person game, and i looked right and left about there (was scared from something and panicked;P). I can give the original lossless clip if you want. EDTI: Added anyway: http://www.sendspace.com/file/embffb VP9 file, encoded with the settings got from some posts before, though 1 pass, (donīt know how to get 2 pass working). And also the lossless clip is there. Last edited by zerowalker; 9th July 2013 at 01:58. |
9th July 2013, 02:01 | #238 | Link | ||
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Quote:
Quote:
I have no idea, I re-encoded the resulting webm file to a x264 file with --crf 0 (lossless) to check the end result. |
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9th July 2013, 13:21 | #239 | Link | |
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9th July 2013, 18:01 | #240 | Link |
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I decided to re-do zerowalker's tests at higher bitrates, I also re-did the 300 bitrate test.
VP9 used the same settings I posted above (lifted from the webm mailing list) and is 2 pass. For x264 I used --preset=placebo and --tune=film (as per benwaggoner's suggestion) and 2 pass. I encoded at the following bitrates: 300, 1000 and 2000. VP9 300 bits: http://img24.imageshack.us/img24/9178/nklw.png http://img811.imageshack.us/img811/593/exk1.png VP9 1000 bits: http://img441.imageshack.us/img441/2787/lhf.png http://img19.imageshack.us/img19/3884/ysyz.png VP9 2000 bits: http://img28.imageshack.us/img28/406/akn8.png http://img856.imageshack.us/img856/7550/x9i.png x264 300 bits: http://img841.imageshack.us/img841/4861/vi2z.png http://img600.imageshack.us/img600/4782/qbqo.png x264 1000 bits: http://img7.imageshack.us/img7/9409/1n2k.png http://img829.imageshack.us/img829/221/2v7.png x264 2000 bits: http://img585.imageshack.us/img585/6510/cghv.png http://img580.imageshack.us/img580/3185/n6k.png With this specific high definition content, and at these bitrates, VP9 certainly came out the clear winner. I'll try uploading the resulting files to sendspace or something in a couple of minutes. edit: here are the files http://www.sendspace.com/file/0quq36 Last edited by BadFrame; 9th July 2013 at 18:30. |
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google, ngov, vp8, vp9, vpx, webm |
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