[FFmpeg-user] ffmpeg ip cam stream with drawtext

Moritz Barsnick barsnick at gmx.net
Wed Jan 30 15:36:12 EET 2019

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.


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