Thanks Alex! Can you share your command that you are using? On Thu, Feb 28, 2019 at 8:06 PM Alex Giladi <[email protected]> wrote:
> Sunil, all, > From our experiments a few months ago, gains from AVX-512 were noticeable > (>5%) at veryslow preset and 4K resolution. > Best, > Alex. > > On Thu, Feb 28, 2019, 06:06 Sunil Kumar <[email protected]> wrote: > >> Thanks Mario and Kalyan for reply, >> I have checked with same command avx512 is giving more FPS compared to >> avx2. I am not able to understand with increasing the number of cores the >> FPS is reducing after certain point . >> How can i decide how many cores are need to use for best performance? >> >> About preset i have used it but as I mentioned in mail it will reduced >> the quality of video right? By default *preset* values is 5 (medium) >> same is with *crf (using 52 is giving best fps at the cost of quality). * >> >> Any *system level tuning *that help in increasing the performance? >> >> Can you also please give any example commands in general. How can I use 2 >> pass (doest it help in improving the performance) >> Thanks, >> >> On Thu, Feb 28, 2019 at 3:33 PM Kalyan Goswami < >> [email protected]> wrote: >> >>> Hi Sunil, >>> >>> From the very first glace of your command line, I think you have missed >>> the --preset option. [ >>> https://x265.readthedocs.io/en/default/presets.html]. You can try the >>> ultrafast or superfast preset for higher performance. Regarding the >>> overview of different CLI options plz check the x265 documentation: >>> https://x265.readthedocs.io/en/default/cli.html >>> >>> Thanks, >>> Kalyan Goswami, PhD >>> Video Architect @ MulticoreWare >>> http: <http://www.multicorewareinc.com/>//www.multicorewareinc.com >>> <http://www.multicorewareinc.com/> >>> +91 9884989331 >>> >>> >>> On Thu, Feb 28, 2019 at 3:01 PM Mario *LigH* Rohkrämer <[email protected]> >>> wrote: >>> >>>> Hi Sunil. >>>> >>>> Just a general note: AVX512 is not certainly faster than AVX2 on every >>>> CPU model. There have been a few tests e.g. in the doom9 video forum. >>>> So >>>> don't expect miracles. >>>> >>>> Knowing your exact CPU model may help estimating if there can be a >>>> speedup, or if it is a model which may e.g. throttle too much to avoid >>>> overheating. >>>> >>>> But wait for more experienced replies than mine... >>>> >>>> >>>> Sunil Kumar schrieb am 28.02.2019 um 09:17: >>>> > Hi, >>>> > I am new to media encoding, I have heard that x265 is a very >>>> efficient >>>> > encoding tool on Intel's platform with avx512 enabled. But I am not >>>> able >>>> > to get good FPS with avx512 enable. Can you please help me improving >>>> the >>>> > performance? >>>> > >>>> > 1) I have tried with core pinning but it seems like using more cores >>>> is >>>> > not beneficial, even reducing the FPS, How can we decide the no. of >>>> > cores for best FPS in multi socket system. >>>> > >>>> > 2) Can suggest the command for efficient performance like the best >>>> > command line parameters or performance parameters (if we use preset >>>> then >>>> > it will compromise with the quality of video and same with CRF, help >>>> in >>>> > deciding best thing). >>>> > >>>> > 3) How can I run in parallel or in multi pass (2 pass) please give an >>>> > command example. >>>> > the command i was using is: >>>> > >>>> > ./x265 --input <video.yuv> --input-res 1920x1080 --fps 50 --output >>>> > out.hevc --max-merge 3 --no-tskip --no-rect --frame-threads 16 >>>> --pools >>>> > "+,-" --bitrate 16000 --asm avx512 >>>> > >>>> > how can we decide the --fps for input video? max-merge, no-tskip, >>>> > fram-threads etc. >>>> > Please give command so that it will help me out. >>>> > Thanks, >>>> > Sunil >>>> > >>>> > >>>> > _______________________________________________ >>>> > x265-devel mailing list >>>> > [email protected] >>>> > https://mailman.videolan.org/listinfo/x265-devel >>>> > >>>> >>>> >>>> -- >>>> >>>> Fun and success! >>>> >>>> Mario *LigH* Rohkrämer >>>> maito:[email protected] >>>> _______________________________________________ >>>> x265-devel mailing list >>>> [email protected] >>>> https://mailman.videolan.org/listinfo/x265-devel >>>> >>> _______________________________________________ >>> x265-devel mailing list >>> [email protected] >>> https://mailman.videolan.org/listinfo/x265-devel >>> >> _______________________________________________ >> x265-devel mailing list >> [email protected] >> https://mailman.videolan.org/listinfo/x265-devel >> > _______________________________________________ > x265-devel mailing list > [email protected] > https://mailman.videolan.org/listinfo/x265-devel >
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