[x265] x265 0.8+247 (new XP compat.) crashes in single thread mode

[Mario Rohkrämer]

I tested a bit in a VirtualBox and found that v0.8+149 (last XP compatible  
build before introducing the new threading model) works on an Unicore CPU  
in Windows XP SP3, but 0.8+247 (one 32 bit build which compiles in MSYS  
with WINXP_SUPPORT enabled again) reports disabled parallelism and using  
single thread mode, but then crashes when starting to encode. Setting the  
virtual machine to have at least 2 cores, encoding starts.

But well ... noone should want to work in single thread mode; version  
0.8+149 worked with less than 1 fps in preset ultrafast with a 640x272  
video.

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Fun and success!
Mario *LigH* Rohkrämer
mailto:contact at ligh.de