[LAU] Some ffmpeg/avconv questions

[Lorenzo Sutton]

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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