CRF B-frames

[Legiit]

Hi
I've started using CRF to rip my Blurays but I can't seem to notice a difference if I use 3 or 16 B-Frames. So is there anyway to calculate how many B-frames are needed for the encode?
Thanks

[jagabo]

Look at the summary when you're done. But using more than 3 is asking for trouble (and usually a waste of time). Many devices don't support more than 3.

A sample from the summary of a short encode with 16 bframes:

x264 [info]: consecutive B-frames: 12.3% 27.6% 59.3%  0.8%  0.0%  0.0%  0.0%  0.0%  0.0%  0.0%  0.0%  0.0%  0.0%  0.0%  0.0%  0.0%  0.0%

12.3 percent of the time it used 0 bframes
27.6 percent of the time it used 1 bframes
59.3 percent of the time it used 2 bframes
etc.

[jman98]

You are encoding. You are not "ripping". Using the correct term not only keeps you from looking like a moron, it allows people to help you correctly.

[Legiit]

Look at the summary when you're done. But using more than 3 is asking for trouble (and usually a waste of time). Many devices don't support more than 3.

A sample from the summary of a short encode with 16 bframes:

x264 [info]: consecutive B-frames: 12.3% 27.6% 59.3%  0.8%  0.0%  0.0%  0.0%  0.0%  0.0%  0.0%  0.0%  0.0%  0.0%  0.0%  0.0%  0.0%  0.0%

12.3 percent of the time it used 1 bframe
27.6 percent of the time it used 2 bframes
59.3 percent of the time it used 3 bframes
etc.

Thanks. I'm only using ~2000 bitrate so more than 3 will be useless i think. That's why i can't tell the difference between 3 or 16 because there isn't much.