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16th March 2017, 21:54 | #5001 | Link | |
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I wonder if aq-mode also needs to be retuned for the new lambda table. |
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16th March 2017, 22:02 | #5002 | Link | |
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Can you share a sample of this content? I'm having a hard time visualizing. It's possible that you could adapt your own lambda table if it has very different psychovisual properties. |
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16th March 2017, 23:17 | #5003 | Link | |
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Tried aq3 in the past, somehow wasn't good as expected. Some improvement in dark areas, but the impression was more blurring. The aq-motion currently in use is giving good results, besides it seems to disable standard aq modes (correct me if Im'm wrong). |
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17th March 2017, 08:44 | #5004 | Link | |
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It's crazy how even LG and Samsung buildup a whole Broadcasting Network and experimenting their.
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all my compares are riddles so please try to decipher them yourselves :) It is about Time Join the Revolution NOW before it is to Late ! http://forum.doom9.org/showthread.php?t=168004 Last edited by CruNcher; 17th March 2017 at 09:27. |
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17th March 2017, 12:53 | #5007 | Link |
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x265 v2.3+23-97435a0870be (MSYS/MinGW, GCC 6.3.0, 32 & 64bit 8/10/12bit multilib EXEs)
x265 [info]: HEVC encoder version 2.3+23-97435a0870be x265 [info]: build info [Windows][GCC 6.3.0][32 bit/64 bit] 8bit+10bit+12bit x265 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX AVX2 FMA3 LZCNT BMI2 Code:
https://bitbucket.org/multicoreware/x265/commits/branch/default |
17th March 2017, 12:53 | #5008 | Link |
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Are there any "sensible low anchor" GCC optimizations you would suggest for x265?
I just compared build scripts on two different PCs, because I noticed a size difference, and found that I used Code:
export CXXFLAGS="-march=pentium4 -mtune=generic" |
17th March 2017, 20:32 | #5010 | Link |
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Hi there. For Video Usability Information, is it possible to add support for the new color primaries in the latest (4th) version of the HEVC standard on the ITU website, such as DCI P3? Also, can the new SMPTE ST 2085 color matrix and the ICtCp color matrix be supported?
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17th March 2017, 20:57 | #5011 | Link | |
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Tom Vaughan VP and GM, Video By the way, I'm the only person who logs into Doom9 as x265_Project |
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17th March 2017, 21:28 | #5012 | Link | |
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You can consider difference in speed. I've made test of encoding with command line: x265_32 -D10 -f130 ../ducks_take_off_1080p50.y4m w.hevc The result was: LigH 2.3+17 version with -march=pentium4 -mtune generic encoded 130 frames in 100.31s (1.30 fps), 8566.20 kb/s, Avg QP:38.35 Barough 2.3+23 version encoded 130 frames in 133.73s (0.97 fps), 8562.60 kb/s, Avg QP:38.35 2.3+23 version GCC 7.0 SSE4.1 encoded 130 frames in 84.20s (1.54 fps), 8566.20 kb/s, Avg QP:38.35 2.3+23 version GCC 7.0 SSSE3 encoded 130 frames in 92.38s (1.41 fps), 8566.20 kb/s, Avg QP:38.35 If you do not specify -march=pentium4 -mtune=generic for 32-bit x265, the encoding time in 10-bit mode will be longer about 33%. Computers with Pentium 3 are very slow and with tiny memory so anyway there are not for x265 encoding. |
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17th March 2017, 21:55 | #5013 | Link | |
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ICtCp is used for Dolby Vision encoding, and so definitely has a significant current use case. It seems likely that the lambda table will need to be retuned for it (and probably for HDR PQ in general), and that --hdr-opt may need to be refactored for ICtCp. I imagine Dolby would be motivated to help get MCW the necessary details. What is SMPTE 2085 for? I see it's YDzDx Color-Difference Encoding for XYZ signals. Some sort of more efficient digital cinema color space or something? |
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17th March 2017, 22:34 | #5014 | Link | |
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17th March 2017, 23:32 | #5015 | Link | |
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That also means CIE XYZ (SMPTE ST 428-1) primaries would have to be supported in Video Usability Information. |
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17th March 2017, 23:45 | #5016 | Link | |
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My speed test was for 32-bit version of x265 and 10-bit mode. It is similar to 64-bit x265 with option --no-asm. |
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18th March 2017, 11:20 | #5018 | Link |
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I make little comparison with ICC, GCC 7.0 and VS 2017: VS 2017 seem produce better speed for x265.
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Le Sagittaire ... ;-) 1- Ateme AVC or x264 2- VP7 or RV10 only for anime 3- XviD, DivX or WMV9 |
18th March 2017, 12:09 | #5019 | Link |
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I still wonder if there is a recommendation whether I should use no additional compiler flags (because CMake scripts already take enough care of that?), or may enable some basic optimizations just based on a minimum architecture suitable for x265 due to architecture details (e.g. cache dimensions). Ma's remark about P3 vs. P4 class sounds worth a thought. Regarding AMD, I would assume Athlon 64 X2 (K9 core) as low anchor. In general, I'm looking at architectures implementing at least SSE2, because I see the Phenom-II CPUs I can use as a minimum I need to support with my own builds (still trying to get rich...).
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18th March 2017, 12:16 | #5020 | Link | |
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Need a third one to confirm the trend. Anyone else? |
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