[FFmpeg-user] Simultaneous two-pass?

[Carl Eugen Hoyos]

Jesse Gordon <tojesseg <at> gmail.com> writes:

> But I suppose there is a limit to how far ahead 
> bandwidth can be borrowed.

Why do you think so?
I don't think it is true in the general case.

> All I want is to run the second pass just one 
> borrow-window's-width behind the first pass 

Isn't that what one-pass encoding with a set 
bit-rate does?

[...]

> I have 8 cores in my CPU and I did notice that ffmpeg 
> was using about "160%" which means almost 2 cores. 
> However, idle was still around 80%,

Play with different values for -threads
And note that not all encoders and not 
all decoders support multi-threading.

Carl Eugen