Get these out of the way:
1. One of your audio devices has a sample rate that doesn't match the rest. This can result in audio drift over time or sound distortion. Check your audio devices in Windows settings (both Playback and Recording) and ensure the Default Format (under Advanced) is consistent. 48000 Hz is recommended.
OBS Sample Rate:
48000 Hz
Line In (Realtek High Definition Audio):
96000 Hz
Speakers (Realtek High Definition Audio):
48000 Hz
2. Custom FFMPEG output is in use for recording. Only absolute professionals should use this. If you got your settings from a YouTube video advertising "Absolute best OBS settings" then we recommend using one of the presets in Simple output mode instead.
3. Your logs contain streaming sessions with dropped frames. This can only be caused by a failure in your internet connection or your networking hardware.
It is not caused by OBS. For now enable Dynamic Bitrate in the Advanced Network Settings and then follow the troubleshooting steps at:
Dropped Frames and General Connection Issues.
4. The next time OBS crashes after making those changes, re-open OBS, go to Help > Crash Reports > Upload Previous Crash Report > Copy URL and paste it here. Do the same for Log Files (just the Previous one).