[Cin] Test rendering whit x265

[Andrea paz]

I tried compiling the latest git by putting in the following patches:
compile_multibit_X265.txt; ffmpeg_flush_tmp.diff and
disallow_inserting_effect_if_disarmed.diff. I deleted ffmpeg-4.3 and
its patches and added ffmpeg-4.4.tar.xz.
The compilation fails; I attach cin5.log
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