I tried your command, but its giving: *x265 [warning]: poc:49, VBV underflow (-539040 bits)0:01:36* and 2.45 fps only
On Sun, Mar 10, 2019 at 12:25 AM Alex Giladi <[email protected]> wrote: > x265 --aq-mode 3 --aud --bframes=5 --chromaloc 2 --colormatrix bt2020nc > --colorprim bt2020 --csv-log-level=4 --ctu 64 --dynamic-rd 4 --fps 59.97 > --frame-threads 1 --input-depth 10 --input-res 3840x2160 --keyint 120 > --level=51 --log-level=4 --lookahead-slices=0 > --master-display="G(13250,34500)B(7500,3000)R(34000,16000)WP(15635,16450)L(10000000,50)" > --max-cll=1000,399 --min-keyint 60 > --no-amp --no-cutree --no-high-tier --no-interlace --no-open-gop > --no-opt-qp-pps --no-opt-ref-list-length-pps --no-rect --output-depth 10 > --preset veryslow --profile main10 --qg-size 8 --rc-lookahead 180 --rd 4 > --rdoq-level 1 --ref=4 > --repeat-headers --ssim-rd --subme 7 --transfer 16 --weightb --input > <..>.yuv --input-res 3840x2160 > --output <...>.265 --csv <...>.csv > > On Thu, Mar 7, 2019 at 1:40 PM Sunil Kumar <[email protected]> wrote: > >> 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 >>> >> _______________________________________________ >> 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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