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18th December 2018, 11:09 | #81 | Link | |
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Instead, i manualy put all the fixes from the master, except things which are specific to CPU not Intel.
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18th December 2018, 17:02 | #82 | Link | |
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18th December 2018, 23:41 | #83 | Link | |
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(It would pretty much be a comparison of apples and oranges, because a whole lot of things may have changed between the builds you are comparing)
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19th December 2018, 22:14 | #84 | Link |
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Just comparing them seems like none of them are compiled with opencl support? Was this deprecated at some point? I was reading about it not speeding up encoding much (~3%) but that translates to hours if your plan is to encode a library.
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19th December 2018, 22:23 | #85 | Link |
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I did some tests with "--OpenCL" a while ago and the speedup was ~1% at best (GTX750).
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19th December 2018, 22:41 | #87 | Link |
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Most builds should have it enabled since it's the default. You have to disable it in ./configure (--disable-opencl) if you don't want it included.
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19th December 2018, 22:52 | #89 | Link |
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Groucho's Avisynth Stuff Last edited by Groucho2004; 19th December 2018 at 22:54. |
19th December 2018, 22:53 | #90 | Link |
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Both LigH's x264, and the videolan one, are compiled with OpenCL support. So, it's just a matter of running your x264 flavor command-line with --opencl or not, for the test.
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19th December 2018, 22:58 | #91 | Link |
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I tested with videolan's, Ligh's and tmod. So not sure why it doesn't work, it warns me with a:
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x264 [warning]: OpenCL: not compiled with OpenCL support, disabling edit: yes confirmed, not working in 10-bit mode, only in 8-bit. Last edited by Dogway; 19th December 2018 at 23:02. |
19th December 2018, 23:14 | #92 | Link | |
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It just so happened Lord_Mulder explained the 10-bit thing to me this very day. See: no OpenCL for 10-bit
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20th December 2018, 09:47 | #94 | Link |
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I'm not 100% sure so this may have to be verified, but i vaguely remember reading once (it was now a long time ago), also that opencl doesn't produce exactly the same result than pure software (a little less good).
Considering that, the fact that to compile with opencl you need to install others third-party "things", the fact that speedup is not realy significant, i personnaly don't compile with opencl in the releases i made, and don't intend to bother with.
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20th December 2018, 10:17 | #95 | Link | ||
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As for having to 'install' third-party "things", I don't think that's a real issue: every Windows install will come with at least a default OpenCL.dll in its path.
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20th December 2018, 10:44 | #96 | Link |
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I made a test and at slower preset I get 109fps without opencl and 113 at most with it. That's about 3%, or an extra 1h and a half of rendering content for a 24fps film for 9h at night. tMod is already 3 or 4% faster than other builds I tested so if what you say is true I guess than at equal speed I would rather use one that doesn't degrade my content. Too bad we can't have both for a 7% gain haha.
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21st December 2018, 10:24 | #98 | Link |
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Someone (not me... ) made tests with my releases (only on the x64 versions). It says that win32 version was around 1~2% faster than posix version, and Broadwell version was around also 1~2% faster than "normal" release. Both combined, you can indeed maybe achieve 3~4%. Different build configuration can explain differences in speed, but only that. Otherwise, code is the same. I'm not sure that only difference in gcc version could produce a such difference on speed.
Out of curiosity, when you said tMod is around 3~4%, which build ? Win32 or Posix ? Normal or Broadwell ? Ah, and about opencl, i should have said : To build with it, it seems that i need to install in the build environement some others third party things i don't know about, so, too much bother for something from my point of view is not worth it.
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21st December 2018, 14:14 | #99 | Link |
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I own a 4670K so didn't use the Broadwell build only x64 of winthread. Not sure if my earlier tests were wrong I just ran another test both in 8 and 10bit for 7000 frames and LigH's is slightly faster 2%. Maybe different content yields different speeds. I read the speed from the last line when encoding finishes I assume means average.
Source: 1080p@60fps 8-bit CRF: 24 preset: slow tune: touhou 8-bit tmod 111.92fps 107.45fps 117.62(--no progress) LigH 113.54fps 116.83fps vlan 117.05fps 116.57 LigH 121.68fps (--opencl on GTX1070) vlan 121.26fps (--opencl on GTX1070) 10-bit tmod 65.64fps LigH 66.10fps On a different note I get worse results in 10-bit for the same target bitrate (same settings) and even worse quality with x265 also 10-bit, makes no sense, would like to see some quality benchmarks out there. Last edited by Dogway; 21st December 2018 at 21:13. |
21st December 2018, 14:19 | #100 | Link | |
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