[FFmpeg-user] ffmpeg ip cam stream with drawtext

frhun frobihun at gmail.com
Thu Jan 31 10:39:37 EET 2019

excuse me, at first I did not read properly what you wrote

you look ,I delete the drawtext, and do not use c:v copy
but the cpu usage same with drawtext ~30%

ffmpeg -r 25 -rtsp_transport tcp -i 
rtsp://admin:12341@ -c:v libx264 -b:v 
2M -c:a copy -preset ultrafast -f flv 

I seen the gpu, this is Ironlake-M
the cpu is Mobile Dual Core i5-560M

whether can be used ffmpeg with gpu ?

thank you for dealing my problem!

2019. 01. 30. 14:36 keltezéssel, Moritz Barsnick írta:
> On Wed, Jan 30, 2019 at 13:25:26 +0100, frhun wrote:
>> if -c:v copy then not working drawtext!
> Of course not! What I asked was "how does this performance change if you omit all the
> filters" - and you are *not* supposed to use "-c:v copy", so we can see
> approximately how much of your CPU performance is used by the encoding
> process, and how much by the filter.
>> so the drawtext re encoding do high cpu usage, I use the notebook (
>> thinkpad i5 3 generations) gpu is no to perfect :)
> That's not true. The filter *implies* not being able to do "-c:v copy",
> but it may not be the actual filter using all the compute power, but
> the CPU-based encoding. And if so, we might be able to help you by
> recommending other encoding parameters or use of a GPU based encoder.
> Moritz
> _______________________________________________
> ffmpeg-user mailing list
> ffmpeg-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
> To unsubscribe, visit link above, or email
> ffmpeg-user-request at ffmpeg.org with subject "unsubscribe".

More information about the ffmpeg-user mailing list