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20th October 2016, 18:17 | #1 | Link |
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Multi-threaded encoding using multi-pass
Hi. As I know using multiple threads will reduce quality (more or less). So what if I use 8 threads with 5 passes instead of 1 thread and 2 passes? Will increasing number of passes fix this quality loss?
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20th October 2016, 21:01 | #3 | Link |
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In the test is generally threads one. You get the impression that eight threads is a bad idea, but it isn't true. It is quicker conversion. For CRF is only pass one. Pass two gives the same result.
Last edited by Jamaika; 20th October 2016 at 21:06. |
16th November 2016, 09:27 | #4 | Link |
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Guys,
Today I tried to convert a video.Mp4 encoded with HEVC MAIN 5.1 ~2500kbps to h264 using handbrake and total codec studio. The presets are: X264 Mian 3000kbps and the encode mode is "best" or "insane" in Handbrake. Mainconcept H264 Mian 3000kbps and the encoding mode was in the slowest. I configured an HP DL380 G9 server by two intel Xeon 2698 v4 processor and two Samsung 16GB PC4 2400 memory modules and have installed Windows Server 2012. But what is strange that is that I encountered with very low usage of resources while encoding: only about 7 - 20% usage of CPU Handbrake uses only one CPU, usage is ~ 20%, But Total code studio uses both of them and all 40 cores, usage is ~ 10% what's the problem? Why they can't use all power of the processors? Last edited by kral2008; 16th November 2016 at 11:05. |
17th November 2016, 01:28 | #5 | Link |
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Try disabling hyperthreading and setting threads to 40. You're probably single-thread limited somewhere and it would probably be best if that was pinned to a real core.
Too many lookahead threads? Too few? Try playing around with it. |
17th November 2016, 18:59 | #7 | Link | |||
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Quote:
About Ram and HDD, no. But about graphics, yes; cause you can't install any graphics card on severs (unless you use Workstations). The server uses a: Quote:
Quote:
I think servers injures from lacking a good enough graphics card. Could this a problem? Consider that I didn't use any H/W Acceleration in both of Handbrake and Total code studio. |
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18th November 2016, 10:41 | #9 | Link | |
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Then what is the solution? I see some people have encoded BD media by x265 and its high profiles, the size is about ~70GB, what is the processor and parameters that they use? Because windows monitoring can't detect the raid system that we made by "p440ar" smart array. however the core of windows and other applications can use it. |
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18th November 2016, 17:43 | #10 | Link |
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Why don't you encode mutiple chunks simultaneously ?
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18th November 2016, 19:06 | #11 | Link |
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This could be the best solution.
How can I do that? You mean using vmware on the server, and then creating some virtual machine, then connecting these machines to the main server that has ripbot? or simply, using your application is enough? Last edited by kral2008; 18th November 2016 at 19:13. |
18th November 2016, 21:59 | #12 | Link |
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