[x265] x265 misses target bitrate in 2-pass VBR; extreme sample: unable to converge

[Mario *LigH* Rohkrämer]

Am 24.02.2016, 13:50 Uhr, schrieb Mario *LigH* Rohkrämer <contact at ligh.de>:

> Am 24.02.2016, 13:07 Uhr, schrieb Mario *LigH* Rohkrämer  
> <contact at ligh.de>:
>
>> I will try to recreate this result with some older versions to narrow  
>> down a possible reason...
>
> This issue was introduced between versions 1.8+167-e951ab673b1c and  
> 1.8+201-769081eb5f4c.

'Ma' in the doom9 forum discovered that it happened after the big patch  
for 2-pass CRF:

https://bitbucket.org/multicoreware/x265/commits/73cc1cd4c7fc0920a6b126fefebeea6269749498

http://forum.doom9.org/showthread.php?p=1758434#post1758434

Quite an expectable discovery.

-- 

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