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Rupertt 11-01-2013 02:19 AM

using gstreamer and pulse audio devices for visualisation

im trying to use audio visualisation with my line in port.
In our music forum i got a tip and have it somehow working with this line:


gst-launch-1.0 -v pulsesrc ! goom ! videoconvert ! xvimagesink force-aspect-ratio=false
Problem here seems that it also uses the microfone in and not just the line in.
i did try this like suggested:


gst-launch-1.0 -v pulsesrc alsa_input.pci-0000_00_1b.0.analog-stereo ! goom ! videoconvert ! xvimagesink force-aspect-ratio=false
but i get this error:


WARNING: erroneous pipeline: could not link pulsesrc0 to goom0
So how can I find out which device name I have to use with pulesrc?
Is it possible to tell gst-lauch to just use my secondary Monitor?

second question is, can I use projectM (milkdrop) in the same way with gstreamer?
Does goom have presets that I can choose from?

My System is a Ubuntu 13.04.

Drakeo 11-01-2013 02:38 AM

I am not knocking pulse it runs very well when ran vanilla. But if your really going use some power Jackd qtjackd is a mighty tool and would just pause pulse.
That said there is some very smart pulse people that have some good I Ideas how to do that. I have several speakers and Mic's and 2 sound cards and two usb device sound cards. there is a will there is a way. Got Milk you can do anything look at KDE they use gstreamer for a back end. Well they can.

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