On Tue, Sep 11, 2018 at 02:03:06PM +0200, Moritz Barsnick wrote: > On Tue, Sep 11, 2018 at 15:46:11 +0530, Abhijit Nathwani wrote: > > > > Could it be that your ALSA capture device's recording is muted? > > I don't know. How to ensure that? > > ALSA's command line tools' syntax is truly difficult (PITA, if you know > what the term means). You can use the command "amixer" to display the > present state. You can use a "GUI" (ncurses) program such as > "alsamixer" to graphically display all ports' states. Some may show > "[off]". You need to switch the recording port "[on]". I used to do > this with "amixer" or possibly "alsactl", when I was still using ALSA > directly, but it took me days to figure out the syntax. My notes say I > did something like this: > > $ amixer eset 'Input Gain Switch',0,Switch2 on > $ amixer eset 'Line Switch',0,Switch2 capture > $ amixer eset 'Input Gain Volume',0,Volume1 9 > > Modern ALSA or newer frontends may be nicer.
The command alsactl init will set reasonable defaults on the sound device. Alsamixer is quirky. I recently discovered qasmixer, which seems to have been designed with care. https://xwmw.org/qastools/applications/qasmixer.html -- Joel Roth _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
