[FFmpeg-user] Reduce CPU usage to match VLC

[Anshul]

Anshul <anshul.ffmpeg at gmail.com> wrote:
>
>
>Loadlinx <limiteddi at gmail.com> wrote:
>>Tried with 5 processes and it breaks the picture.
>>
>>
>>On Mon, Feb 10, 2014 at 10:58 AM, Reindl Harald
>><h.reindl at thelounge.net>wrote:
>>
>>> do you *think* that or have you tried it?
>>>
>>> you can't calculate "booh CPU usage multiplied with cores gives
>>streams"
>>> the one and only question is if the overall load can handle
>>> the streams without drop frames and how the OS will schedule
>>> the threads and processes
>>>
>>> the final goal is that any of your cores are 100% loaded and
>>> nothing breaks down
>>>
>>> Am 10.02.2014 16:51, schrieb Loadlinx:
>>> > At 120% i am still limited to only ~4 transcoding sessions.
>>> > Maybe the quality is not the same and maybe ffmpeg is faster.
>>> >
>>> > I am willing to sacrifice quality for lower CPU usage. Is this
>>possible?
>>> I
>>> > tried -preset:ultrafast but no difference in CPU usage observed.
>>> >
>>> >
>>> > On Mon, Feb 10, 2014 at 10:46 AM, Carl Eugen Hoyos
>><cehoyos at ag.or.at>
>>> wrote:
>>> >
>>> >> Loadlinx <limiteddi <at> gmail.com> writes:
>>> >>
>>> >>> /vlc -vvv http://192.168.1.50:6002 --sout
>>> >>> '#transcode{venc=x264{preset=ultrafast}
>>> >>                                ^^^^^^^^^
>>> >>
>>> >>> ./ffmpeg -i http://192.168.1.50:6002
><http://162.219.0.246:12709>
>>> >>> -vcodec libx264 -vb 1500k -s 480x320 -acodec libfdk_aac -ab 32k
>>> >>> -f flv rtmp://192.168.1.50:1935/live/709
>>> >>
>>> >> (Complete, uncut console output missing.)
>>> >>
>>> >> Aren't these two completely different things?
>>> >> Or does libx264 nowadays default to ultrafast?
>>> >>
>>> >>> Quality seems to me somewhat the same
>>> >>
>>> >> somewhat: maybe
>>> >> the same: most likely not
>>>
>>>
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>>>
>>>
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>
>
>Please try to match the encoder parameters of vlc and ffmpeg.
>Since ffmpeg and vlc both use libx264(same code). I have assumed
>That your codec is h264.
>
>On mailing list please try to top post.
>As specified by carl please post the uncut logs from ffmpeg, that way
>we can understand your problem better
>Like in your case I am not sure what codec is used and what were the
>configuration.
>
>I dont guaranty the solution, since I dont know how vlc is working
>
>-Anshul
>-- 
>Sent from my Android device with K-9 Mail. Please excuse my brevity.


Sorry I meant dont top post over here
-- 
Sent from my Android device with K-9 Mail. Please excuse my brevity.