Re: Some ffmpeg/avconv questions

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On 29/06/13 19:22, Rustom Mody wrote:
Ive been trying to capture some screencasts of talks mine with avconv.

many sites seem to recommend using
-vpre lossless_ultrafast

 From the pov of the machine does this consume more CPU or less?

If I set sample-rate to 11000 will ordinary speech be spoilt? What about
5500?

I don't think the audio sample rate will have a great impact on CPU consumption, actually using your sound card's 'native' sample rate might save a bit of cpu (if it's a laptop I guess it might be 48k?)

I think what's going to impact most on the cpu is the video framerate... Many tutorials suggest using 30 fps, but for a screencast 20 or even 15 might be enough.

My two cents.
Lorenzo.


Basically I have an i5 laptop but it starts making a racket if its
driven too much.
So trying to run it cool


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