So I have Missing audio on 2 videos, videos before that and after that have sound and I have not changed anything. Is there a way to get the audio working? And What can cause this? all videos before these 2 have audio and videos after that have audio. I have done absolutely nothing to settings or anything. File format is MKV on all my recordings
If you changed nothing (at will) you should check if any of the audio devices mentioned in the obs Settings->Audio section are set to "
Default". That is
strongly encouraged to be avoided. Set your needed audio to the dedicated audio device names instead.
If things are set to "default" OBS relies on the computers audio setttings, whatever will be "default" by its default. And that may change just by boot-up sequence, by the determination sequence in time of devices and usb devices, switching a device to other usb port, and so on.
Don't trust on "default" in all that cases. Set it to specific device names. You will see if OBS starts and something is missing or not delivering audio.
Additionally check in the Advanced Audio Properties (in the obs audio mixer) that the right audio sources are routed into the right audio tracks. Check in the Settings->Output section that the wished tracks are marked for recording and/or streaming, whatever you need.