[HELP] Job crashed with x265 preset ultrafast and animation

[Werve]

Hello,
I think I found out another problem, when i set x265 (with default hybrid profile) use ultrafast preset and tune Animation the job crashed.

Attached log.

Edit: It resolve if i change Motion -> Sub-pixel precision to 1
(x265 fault?)
Also seems that the --psy-rdoq 0.4 of tune animation is not always applied

[Selur]

Hmm, debug output doesn't really show an error aside from that the encoder aborted with "exitcode -1073741819".
That said I can reproduce the issue here and I get:

x265 [info]: HEVC encoder version 3.5+21-428400bf5
x265 [info]: build info [Windows][GCC 11.2.0][64 bit] 10bit
x265 [info]: using cpu capabilities: MMX2 SSE2Fast LZCNT SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
x265 [error]: Lookahead depth must be greater than the max consecutive bframe count
x265 [error]: x265_encoder_open() failed for Enc,
x265 [error]: Failure generating stream headers in x265

Funny thing is that if I use '--tune animation' instead of "--bframes 5 --psy-rd 0.40 --deblock=1:1" encoding works.
(https://x265.readthedocs.io/en/stable/pr...#animation)
Alternatively one could add '--rc-lookahead 6'.

Yes, I thing this is a bug in x265 as it should automatically adjust the rc-lookahead since it wasn't specified in the default settings.
-> I'll adjust Hybrid to make sure that the rc-lookahead is always > b-frame count (not >= b-frame count as it is atm.)

Cu Selur

[Selur]

Send you a link to a dev verison which should fix/workaround the issue.

Cu Selur

[Werve]

Send you a link to a dev verison which should fix/workaround the issue.

Cu Selur

I confirm that now it works