Get better audio by using line input rather than built in converter.

<code>
https://forum.videolan.org/viewtopic.php?t=105918
https://www.instructables.com/id/EasyCap-DC60-STK1160-VLC-Xubuntu-1310-OpenSource-V/
https://gordonlesti.com/digitize-a-vhs-tape-with-ffmpeg-and-easycap-on-linux/
https://itstillworks.com/capture-usb-video-linux-6938954.html
</code>

<code bash>
pacmd list-sources
pacmd list-sources | awk '/name:.+\.monitor/'
</code>

<code>
# Video input:
/dev/video0

# Pulse audio input
pulse://alsa_input.pci-0000_00_1b.0.analog-stereo
</code>

See:
  * https://itstillworks.com/capture-usb-video-linux-6938954.html
  * https://forum.videolan.org/viewtopic.php?t=144692
  * https://forum.videolan.org/viewtopic.php?t=105918
  * https://gordonlesti.com/digitize-a-vhs-tape-with-ffmpeg-and-easycap-on-linux/
  * https://www.linuxquestions.org/questions/linux-software-2/video-capture-software-for-vcr-4175572200/
  * https://linuxtv.org/wiki/index.php/Easycap
  * https://superuser.com/questions/234026/video-from-vhs-via-usb-capture-device-on-linux