Re: Opitical Thunderbolt cables. On a Thinkpad.

[Andrew Richards] "Not true. Frame size absolutely matters, and there is no cap on ProRes data rates"

There isn't? I think there is. Your last quoted sentence sums it up. It does not go above, it only goes down. VBR means that every frame is not encoded at the same data rate, which is why file size very on ProRes, and it's where it gains it's efficiency while still being i-frame.

I was under the impression that ProRes 444 is 330 Mb/sec tops.

4 times the pixels do not equal four time the size in ProRes, there's more math going on than that.

4k ProRes does not equal 500MB/sec.

Ok, I'm done now.

Jeremy