[FFmpeg-user] ffmpeg HIGH CPU, http streaming with libmp3lame

Carl Eugen Hoyos ceffmpeg at gmail.com
Tue Feb 5 01:48:20 EET 2019

2019-02-04 21:31 GMT+01:00, Zoltan Kerenyi Nagy <kerenyi.nagy.zoltan at gmail.com>:

> I was experimenting with these parameters, however the CPU
> usage never changed:
> ffmpeg -f alsa -i hw:0,0-ar 8000 http://localhost:4444/audio.ffm
> ffmpeg -f alsa -i hw:0,0 -b:a 128k http://localhost:4444/audio.ffm
> Do you have any idea, why this procedure  is so CPU intense?

I am not sure iirc but FFmpeg requests a sample fmt from alsa
that alsa does not natively provide and therefore starts to do
useless conversions, you have to find out which format avoids

Carl Eugen

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