record issue sound very low
donny.viszneki at gmail.com
Sun Dec 23 13:35:31 PST 2012
Contrast your two pipelines. What is different about them? Try to do
differential diagnostic between the two pipelines. This is a general
diagnostic technique. Try to test the difference between two scenarios
with as few differences as possible, so that you can isolate the
Differences in your pipelines that I notice:
Second pipeline encodes audio (ffenc_ac3,) whereas first pipeline does
not encode audio.
Your audio source (alsasrc) is using a different parameter:
- pipeline 1: device="alsa_input.usb-Samson_Technologies_Samson_UB1-00-UB1.analog-stereo"
- pipeline 2: device="alsa_input.usb-Samson_Technologies_Samson_UB1-00-UB1"
Another observation I would like to make is that I think ffenc_ac3
does not output mp3, though the fact that you can play your
"audio.mp3" file afterwards suggests to me that your player isn't
having a problem with this.
First thing I would look at is the alsasrc "device" parameter.
On Sun, Dec 23, 2012 at 11:55 AM, Claude Vittoria
<claude.vittoria at gmail.com> wrote:
> I m discovering gstreamer to record audio and I got an issue. I m looking
> for an explication.
> I tried a test
> gst-launch -e pulsesrc
> ! audioconvert ! audioresample ! pulsesink
> and it works very well, good sound in the headphone
> gst-launch -e alsasrc
> device="alsa_input.usb-Samson_Technologies_Samson_UB1-00-UB1" ! queue !
> audioconvert ! \
> ffenc_ac3 ! filesink location=audio.mp3
> the mp3 is not audible, the sound comes from far far far distance as the mic
> was not amplified.
> I tried to modify the settings through the gnome sound applet, alsamixer,
> pavucontrol without result
> What I do not understand in the pipeline concept ?
> I work with a debian sid.
> $gst-launch --version
> gst-launch-0.10 version 0.10.36
> GStreamer 0.10.36
> Thanks and Merry Christmas
> gstreamer-devel mailing list
> gstreamer-devel at lists.freedesktop.org
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