[LAU] FFMPEG - Recording sound from jack

list list at contacte.xyz
Tue Aug 8 15:29:09 UTC 2017

Oh yeah, you are right.

But it's a copy/paste of one of the trick i've tried, my mistake 

Sure i've already done an  : 

ffmpeg -f jack -ac 2  -i hw:1 -f x11grab -s 1920x1080 -r 25 -i :0.0

But the same...

Stangely the jack_capture - or audacity - command work great...but i
want to avoid having, 1 sound file, 1 video file and then join them :/
Dont want to bring out the big guns for that.

Still looking....

Thank you anyway for reading.

All the best.

Le Tue, 8 Aug 2017 10:11:41 -0500,
"Chris Caudle" <chris at chriscaudle.org> a écrit :

> On Tue, August 8, 2017 9:28 am, list wrote:
> > Only Jackd using it - and qjackctl.  
> Your original email had this as the ffmpeg command:
> ffmpeg -f alsa -ac 2 -i hw:1 -f x11grab -s 1920x1080 -r 25 -i :0.0
> 00screencast.mp4
> You are telling ffmpeg to use the ALSA device, but the ALSA device is
> in use by jackd.
> If you want to have ffmpeg capture the ALSA device then don't start
> jackd. If you want to have ffmpeg use jackd ports then read the
> ffmpeg man page for the correct options.  The "-f" argument would be
> jack instead of alsa, but you have to look at all the details of how
> to get the ports connected correctly.  I think you need to use
> qjackctl or jack_connect to connect the ports after starting ffmpeg.

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