Add 1-pass real-time CBR rate control support

[jianj-g]

No description provided.

[leolzhao]

Could you please share some results for the added real-time CBR rate control support? @jianj-g

[jianj-g]

Could you please share some results for the added real-time CBR rate control support? @jianj-g

Here's the rate control (frame size) for a vga clip. You can see that only key frame is huge and the size of all inter frames are relatively stable to achieve CBR.

Around frame 100 there're a lot of motion in the clip, so the frame sizes fluctuate, which also makes sense.

[urvangjoshi]

@jianj-g : pls don't rebase further. I'll rebase and merge after CI finishes.

[jianj-g]

@jianj-g : pls don't rebase further. I'll rebase and merge after CI finishes.

Does it block auto-merge being not up to date with the base branch?

[urvangjoshi]

@jianj-g : pls don't rebase further. I'll rebase and merge after CI finishes.

Does it block auto-merge being not up to date with the base branch?

What we have been doing is wait for CI to finish, then rebase and force-merge without waiting for CI to finish.
But if you rebase on your own, we don't know if CI had finished and succeeded on previous rebase or not. (I couldn't see previous CI pipeline runs for the PR on Github).