No video when audio passthough is selected

[Selur]

How do I send it though?

best upload it to GoogleDrive or something similar and send me a link via PM

1) When encoding with x265, the second pass of a 2-pass encode is way faster than the first. Is there a reason for this? Usually, both passes used to take around the same time, with no-fast-first-pass. The second pass is almost 3 times faster now. It's a very low bitrate (300 kbps, 1080p) encode.

That is probably due to the low bitrate. Most of the analysis is done during 1st pass, and lots of the processing can probably be skipped it the first pass already determines that the a lot of early skips can be used.

2) Is there a downside to enabling "save RPS"? Will it slow down the encode, or cause other issues?

No clue.
It will disable QP and Analysis refinement and I haven't found the time to really test it or have read from someone who tested it properly.

Cu Selur