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HOWTO: ALSA line-in capture with MPlayer | Inspirated
https://inspirated.com/2007/04/05/alsa-line-in-capture-with-mplayer
mplayer -tv driver=v4l2:width=640:height=480:outfmt=i420:alsa:adevice=hw.0: amode=2:audiorate=44100:forceaudio:immediatemode=0:norm=PAL tv:// The adevice, amode and audiorate are dependent on your tuner card, whereas the alsa, forceaudio and immediatemode=0 are mandatory if you’re trying to capture sound from line-in. That’s it.
Alsa Opensrc Org - Independent ALSA and linux audio ...
https://alsa.opensrc.org/Mplayer
mplayer is a mediaplayer app for Linux/X which can play a wide range of audio and video file formats. It is available at http://www.mplayerhq.hu. 2010-02-12 - How to use an alternate ALSA device. So you happen to have a USB audio device or a second sound card and you want mplayer to use that device instead of the typcial internal onboard audio card. First, …
MPlayer
https://mplayerhq.hu/DOCS/man/en/mplayer.1.html
If the device name contains a ’=’, the module will use ALSA to capture, otherwise OSS. arate= (radio capture only) Rate in samples per second (default: 44100). NOTE: When using audio capture set also -rawaudio rate= option with the same value as arate. If you have problems with sound speed (runs too quickly), try to play with different rate values (e.g. 48000,44100,32000,...).
Recording audio from web-based audio player using ALSA ...
https://itectec.com/unixlinux/recording-audio-from-web-based-audio-player-using-alsa-loop-device/
$ alsaplayer audio.mp3 $ alsaplayer -d loop audio.mp3 $ mplayer -vo null video.mp4 $ mplayer -vo null -ao alsa:device=loop video.mp4 AO: [alsa] 48000Hz 2ch s16le (2 bytes per sample) $ mplayer -ao alsa:device=loop audio.mp3 AO: [alsa] 48000Hz 2ch floatle (4 bytes per sample) all sending audio to loop and playing to speakers OK
MPlayer(1) manual page - SourceForge
http://tivo-mplayer.sourceforge.net/docs/mplayer-man.html
A value of 0 means capture and buffer audio and video together (default for mencoder). A value of 1 (default for mplayer) means to do video capture only and let the audio go through a loopback cable from the TV card to the soundcard. -user <user name> (see -passwd option too) Specify user name for http authentication. -vcd <track>
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