[x265] Issue #556: Bug with multipass and HDR (multicoreware/x265)

[afm72]

New issue 556: Bug with multipass and HDR
https://bitbucket.org/multicoreware/x265/issues/556/bug-with-multipass-and-hdr

afm72:

Hi, Using 2-pass with HDR sources and the option --multi-pass-opt-rps

 enabled, glitches appear in every minute of encoded video. tried this with x265 versions from 2.7 up to 3.4 and it gets fixed by disabling option `--multi-pass-opt-rps`. by glitch I mean dropping 4 to 5 frames as can be seen in the attached video `multi-pass-opt-rps.mkv` at frame number 242 it jumps to 247 and this issue is not in the second video `no-multi-pass-opt-rps.mkv` that isn’t using `--multi-pass-opt-rps`.

Thanks for all your work and providing this free encoder.

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