Target with higher bitrate than the source

[kento]

Hello ,
I know , it's friday and you all want to have a good laugh.
I use x265 for several weeks without any fuss.
Encoding some movies with commom parameters , usually with Hybrid.

It gives something like that :
x265 --preset slow --input - --output-depth 10 --y4m --profile main10 --me umh --crf 17.00 --qpfile GENERATED_QP_FILE --range limited --output OUTPUTFILE.

All was fine until I updated Hybrid.
Now each time I tried to encode something , the bitrate starts to roar and I achieve a target at 30% more :/
I tried with StaxRip with the same results.

Obviously I did something wrong but I don't know what.
If someone has an idea :)

[Blue_MiSfit]

Read about what CRF does :)

tl;dr set a higher crf number, or specify the bitrate you want and use 2 pass VBR mode.

[burfadel]

Check the quality of the old and new encodes, if they are different it's possibly the reason.

[kento]

I follow your advices and choose to modify the crf setting.
Right now --crf 22 , I will check the quality.