Thanks! In my case 512MB is probably enough for approx. 8 minute buffer of transcoded video.
I could do the same test with larger transcode directory space for you, but the testing and log output would be much larger.
This small size is only for purpose of example and I’m using larger transcode dir, but the result is the same.
P.S. Last year I created another report of bug here and it’s still valid. But it does not affect me as I was able to find a workaround at network level (NAT).