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20th September 2014, 21:00 | #1 | Link |
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BD-Rebuilder - HEVC
I have decided to dedicate this thread to HEVC and BD-RB discussion, instead of using bug reports thread.
I recently finished testing 4K animation source and posting result here. Common between x264 and x265 --crf 20 --input-res 4096x2160 --fps 24000/1001 --input-csp i420 X264 --output "F:\ Sintel 2010 4K.264" Bitrate average 20694.40 kb/s PSNR Mean Y 48.611 | U 54.778| V 54.238 PSNR Average 49.564 Final File Size 2.13 GB X265 --output "F:\ Sintel 2010 4K.hevc" Bitrate average 16249.31 kb/s PSNR Mean Y 47.644 | U 54.269 | V 53.687 PSNR Average 49.288 Final File Size 1.67 GB *Source is freely available for download to public under creative commons license, do google search if you need it.
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If you fail to plan; you plan to fail, would you not agree? Think about it. Last edited by HWK; 20th September 2014 at 21:07. |
21st September 2014, 01:05 | #3 | Link |
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I am gone be doing tear of steel next in 4K and post result, my aim is to see how psnr change with different source.
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21st September 2014, 08:54 | #4 | Link |
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What does this have to do with BD-RB? This looks like a simple x265 vs x264 match. A large number of GUIs will or already do have x264 and x265 support. It doesn't make sense to create new threads for every GUI as the underlying encoders and results will be the same for all them. This rather belongs into the HEVC sub-forum.
Aside from that: CRF scales of x264 and x265 are not identical, so be careful. Since you provided both bitrate and PSNR this might have at least some value, though. Then again different psy defaults might skew the PSNR results. Last edited by sneaker_ger; 21st September 2014 at 08:59. |
21st September 2014, 16:14 | #5 | Link |
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I created this thread in hope of taking off hevc discussion posts found in bd-rb bugs report thread.
Only reason you see comparison is bd-rb uses x264 to compress and some of us want to do test and see how efficient x265 is over x264.
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If you fail to plan; you plan to fail, would you not agree? Think about it. |
21st September 2014, 16:18 | #6 | Link |
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BD-RB will support x265 backups in the next release, so this can be useful so I can adjust default settings. What? Are we now limiting what people can say specific to their own method of backup? An extra thread isn't going to hurt anything.
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21st September 2014, 17:08 | #8 | Link | |
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Here is my to do list 1. Do grainy video such as saving private ryan 2. Perform test on black and white video 3. Conduct two pass test on both encoders with challenge footage Jdobbs, is there something we can do to help you or need help with?
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If you fail to plan; you plan to fail, would you not agree? Think about it. Last edited by HWK; 21st September 2014 at 17:53. |
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21st September 2014, 20:31 | #9 | Link |
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It is. A lot of people are looking for reviews of the x265 development progress but only few people will look into the BD-Rebuilder sub-forum. Outside people will miss out on the infos collected here and you guys will get less feedback and suggestions concerning your test setups. It's lose-lose.
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21st September 2014, 20:56 | #11 | Link | |
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For testing purpose all of my sources are 4K and yuv format so far. x264.exe --psnr --tune psnr --crf 20 --input-res 4096x2160 --fps 24000/1001 --input-csp i420 --output "F:\movie name.264" "movie name.yuv" pause x265.exe --psnr --tune psnr --crf 20 --input-res 4096x2160 --fps 24000/1001 --input-csp i420 --output "F:\movie name.hevc" "movie name.yuv" pause I will try to upload source later
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If you fail to plan; you plan to fail, would you not agree? Think about it. Last edited by HWK; 21st September 2014 at 22:24. Reason: clear up confusion |
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21st September 2014, 21:20 | #12 | Link | |
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I never thought from feedback perspective, however I have included tags to help search engine.
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21st September 2014, 22:04 | #13 | Link |
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PSNR (Tears of Steel 2012 UHD 4K)
Common between x264 and x265 --crf 20 --input-res 4096x2160 --fps 24000/1001 --input-csp i420 X264 --output "F:\ Tears of Steel 2012 UHD 4K.264 Bitrate average 36121.39 kb/s PSNR Mean Y 44.808 | U 49.709| V 49.770 PSNR Average 45.791 Final File Size 3.08 GB X265 --output "F:\ Tears of Steel 2012 UHD 4K.hevc" Bitrate average 17710.16 kb/s PSNR Mean Y 44.012 | U 49.213 | V 49.277 PSNR Average 45.321 Final File Size 1.51 GB One thing I noticed bitrate was almost double for x264 to come close. Normally it is up to 30 % of x265. I am gone upload the source for this one to try out.
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21st September 2014, 22:16 | #14 | Link |
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Because of psy both x264 and x265 developers suggest using "--tune psnr" if you want to compare psnr. The psy optimizations increase subjective quality but reduce quality of metrics such as psnr and ssim.
But again: same crf does not result in same quality between 264 and x265. |
21st September 2014, 22:29 | #17 | Link | |
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21st September 2014, 22:34 | #18 | Link | |
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This is my findings maybe someone will come up with something different.
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If you fail to plan; you plan to fail, would you not agree? Think about it. Last edited by HWK; 21st September 2014 at 22:42. |
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21st September 2014, 22:53 | #19 | Link | |
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But, well, I think I made my point. Last post from me on the sub-forum discussion. |
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bd-rb, h.265, hevc |
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