FFmpeg scripts for screen recording YouTube videos and YouTube live streaming on OpenBSD.

If you intend to do live streaming, make sure to place your Stream Key under the ~/Document/.streamkey file.

The microphone is disabled by default on OpenBSD.

Temporary enable:

$ doas sysctl kern.audio.record=1

Permanently:

# echo kern.audio.record=1 >> /etc/sysctl.conf

The scripts are capable of recording/streaming audio playback as well. It is done by utilzing mon0. in sndio. You need to enable that or modify the scripts.

Enabling mon:

$ doas rcctl set sndiod flags -v 80 -s default -m play,mon -s mon && doas rcctl restart sndiod

You can specify the volume of playback with -v flag.

It is impossible to control microphone volume using FFmpeg. You need to set it with sndio or cmixer. I recommend the latter.

Install cmixer:

$ doas pkg_add cmixer

If you open the program, it defaults to snd/0, your internal sound card.

To switch the sound card, you must export the AUDIODEVICE variable and then open the mixer.

Example,

$ export AUDIODEVICE=snd/1 # pointing to the first external sound card
$ cmixer
$ unset AUDIODEVICE

Putting it all together, you can create an alias,

$ alias cmixer-microphone='export AUDIODEVICE=snd/1;cmixer;unset AUDIODEVICE'

• OpenBSD FAQ 13 - Multimedia