OBS Crashing due to avcodec-61 and nvencodeapi64.dll

[Wayne01]

The first type of crash: nvencodeapi64.dll

Could you advice what to do? My OBS crashing due to nvencodeapi64.dll

Crash #3: Fault address: 7FFF753F5D10 (c:\windows\system32\nvencodeapi64.dll)
Crash report: https://obsproject.com/logs/aPnO72mwWySM2On3
Current log: https://obsproject.com/logs/04OthFDBdsPzupmC
Previous log: https://obsproject.com/logs/3TxgdG7iOqwsxROr

------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Second type of crash (happens very often): avcodec-61

Crashes 3-4: Jan 29

Crash #4:Fault address: 7FFF62E6E302 (a:\program files (x86)\00. obs portable\bin\64bit\avcodec-61.dll)
Crash report: https://obsproject.com/logs/H0Nm5Dg1pxiBO0k0
Current log: https://obsproject.com/logs/ZPANBxNmsajJOLcY
Previous log: https://obsproject.com/logs/ywLnyK8BonjBiq17

------------

Crashes 2: Jan 27

Crash #2: Fault address: 7FF9D2BC3F87 (a:\program files (x86)\00. obs portable\bin\64bit\avcodec-61.dll)
Previous crash report: https://obsproject.com/logs/lxua3YNGkhryXLXO
Current log file: https://obsproject.com/logs/QpiVfK4ysrENVcGW
Previous log file: https://obsproject.com/logs/qXIg3eMB5O4BU7qa

------------

Crashes 1: Jan 25

Crash #1: Fault address: 7FFD2A76CDB0 (a:\program files (x86)\00. obs portable\bin\64bit\avcodec-61.dll)
Crash report: https://obsproject.com/logs/DRkOwrRrd7MPQ1fe
Log file: https://obsproject.com/logs/VDiWmL5kAbBJkbKe
Current log file: https://obsproject.com/logs/N7UNmwfOgQBvXvOZ

------------

I switched from FFMPEG audio to CoreAudio AAC, it was just fine.. but recently OBS started to crash again, quite often 2-3 times during the stream...

PS This avcodec-61.dll exist only here:
A:\Program Files (x86)\00. OBS Portable\bin\64bit