[LAU] Screencasting: record both desktop and microphone

Paul Davis paul at linuxaudiosystems.com
Mon Nov 3 12:53:54 UTC 2014


On Mon, Nov 3, 2014 at 6:31 AM, Louigi Verona <louigi.verona at gmail.com>
wrote:

> Yeah, when JACK is available - this is good. But many times it is not. How
> is that made on Windows and can it be made on Linux? This is the question!
>

Well,  it is more complicated when there are competing sound systems at
work. On Windows, if the user wants to do a screencast while using an ASIO
driver *and* the native Windows drivers for their little mic, they will
still have problems.

On Linux, the most effective way to do this sort of thing in a JACK-ified
context is almost certainly to do it on a system with PulseAudio installed
and using an ALSA loopback device to talk to JACK. Alternatively, just make
sure that the apps you want to record use gstreamer somewhere under the
hood and then you can tell gstreamer to also talk to JACK. Then record
audio for the screencast from JACK.

The key difference between JACK and other systems on Linux is that its
routing possibilities are not 1:1, which makes it more suitable for this
"capture everything" type of problem. If you didn't want to involve
JACK-ified apps as well, then PulseAudio can probably take care of things
pretty well all by itself.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.linuxaudio.org/pipermail/linux-audio-user/attachments/20141103/799cc1b6/attachment.html>


More information about the Linux-audio-user mailing list