working final webcam vid+audio record command on my desktop running openbsd.org 6.8 amd64
user is g (just the letter g)
$ ffmpeg -f sndio -thread_queue_size 1024 -i snd/0 -f v4l2 -probesize 1G -input_format mjpeg -video_size 640x360 -i /dev/video0 -codec:v libx264rgb -crf 0 -preset ultrafast -codec:a pcm_s16le ~/video.mkv
(it will show a lot of text output and ask to overwrite the file video.mkv if you have already run it once...)
talk to you webcam and mic and make your video+audio
to stop recording type q and enter
****now convert it to MUCH smaller mp4
ffmpeg -y -i video.mkv -codec:v libx264 -vf format=yuv420p -codec:a libmp3lame video.mp4 *****
then open vlc video player and play your new vid! awesome
(next experiment to to try recording directly to mp4)
ffmpeg -f sndio -thread_queue_size 1024 -i snd/0 -f v4l2 -probesize 1G -input_format mjpeg -video_size 640x360 -i /dev/video0 -crf 0 -preset ultrafast ~/video.mp4 (works!)
**(still CONVERT as above to WAY SMALLER FILE!)***
***now convert it to MUCH smaller mp4
ffmpeg -y -i video.mkv -codec:v libx264 -vf format=yuv420p -codec:a libmp3lame video.mp4 ***
Thanks to this guy who helped a lot!
https://www.reddit.com/r/openbsd/comments/ived5q/solved_a_few_issues_recording_sound_audio_using/
I am not sure I needed to change all of these but I think the 120,120 ones being changed to 256,256 (or 252)helped,
mixertctl blah=300 (this sets the parameter you want to max)
I will test on next reboot
user g uses the audioctl command instead of mixerctl the root user uses
kingdom# mixerctl (this is run as user root, note the # not the $ as above when we ran the webcam record as user g)
inputs.dac-0:1=252,252
inputs.dac-4:5=252,252
record.adc-0:1_mute=off
record.adc-0:1=248,248
record.adc-2:3_source=mic2
record.adc-2:3_mute=off
record.adc-2:3=248,248
inputs.mix_source=dac-0:1,cd,mic,line-in,mic2,hp,dac-6:7
inputs.mix_dac-0:1=248,248
inputs.mix_cd=248,248
inputs.mix_mic=248,248
inputs.mix_line-in=248,248
inputs.mix_mic2=248,248
inputs.mix_hp=248,248
inputs.mix_dac-6:7=248,248
record.adc-0:1_source=mic
inputs.dac-4:5_mute=off
outputs.mic_source=dac-2:3
outputs.mic_dir=input-vr50
outputs.line-in_source=dac-4:5
outputs.line-in_dir=input
outputs.line_source=mix
outputs.line_mute=off
outputs.line_boost=off
outputs.line_eapd=on
outputs.hp_source=dac-6:7
outputs.hp_mute=off
outputs.hp_dir=output
outputs.hp_boost=off
outputs.mic2_source=mix
outputs.mic2_mute=off
outputs.mic2_dir=input-vr50
outputs.mic2_boost=on
outputs.SPDIF_source=dig-dac-0:1
inputs.dac-2:3=252,252
inputs.dac-6:7=252,252
inputs.dac-2:3_mute=off
outputs.mic_sense=plugged
outputs.line-in_sense=unplugged
outputs.line_sense=plugged
outputs.master=255,255
outputs.master.mute=off
outputs.master.slaves=dac-0:1,line,hp,dac-6:7
record.volume=255,255
record.volume.mute=off
record.volume.slaves=adc-0:1,adc-2:3
outputs.mode=analog
record.enable=sysctl
video0 and audio0 have to be changed from root to my user g ownership: (chown g: /dev/video0 or /dev/audio0)
kingdom# ls -lah /dev/video0
crwx------ 1 g wheel 44, 0 Mar 24 02:03 /dev/video0
kingdom# ls -lah /dev/audio0
crw-rw---- 1 g _sndiop 42, 0 Mar 26 23:43 /dev/audio0
per the faq you need to enable audio recording in kernel settings, since by default it is off
https://www.openbsd.org/faq/faq13.html#enablerec
https://www.openbsd.org/faq/faq13.html
# sysctl kern.audio.record=1
# echo kern.audio.record=1 >> /etc/sysctl.conf
kingdom# sysctl kern.audio.record
kern.audio.record=1
