Codec bitrate to MB/s

Can anyone explain how I can convert the Codec Bitrate values (given in Resolve) to MB/s?

Are these values in bytes, so 8.4MB ?

Screen Shot 2019-11-26 at 11.14.30.png (8.59 KiB) Viewed 2553 times

Most likely.
It's crap GUI as it should sow units as well (not just some number which you need to guess).

[CaptainHook]

The label explains it. Codec BITrate. It's in Bits.
Resolve also has a limitation in that in only displays the value for the first frame, not the average for the entire clip.

The label explains it. Codec BITrate. It's in Bits.
Resolve also has a limitation in that in only displays the value for the first frame, not the average for the entire clip.

Thanks. So:

8425472 bits = 1053184 bytes or 1.053184 MB. This seems low for a UHD BRAW clip in 12:1? I'd expect closer to 40 MB/s?

I'm just interested in how various compression rates convert to MB/s.

[CaptainHook]

Its the bit rate for the first frame (the SDK can provide bitrate for each frame but currently Resolve only displays the first frame).

Multiply it by your frame rate for the p/s value, so for 24fps its around 25MB/s. But you also can't assume every frame is the same size as the rate control is trying to adapt to whats in frame to achieve the desired size/compression ratio - it will get close but not perfect. That aside I wouldn't expect ~45MB/s unless it was say 4.6K @30fps 12:1

( ( 4640 x 2624 x 12bit* ) / 8 / 1000 / 1000 / 12:1 ) x 30fps = 45.66MBs


*12bit non-linear encoding

[CaptainHook]

These are on our website FYI:

Its the bit rate for the first frame (the SDK can provide bitrate for each frame but currently Resolve only displays the first frame).

Multiply it by your frame rate for the p/s value, so for 24fps its around 25MB/s. But you also can't assume every frame is the same size as the rate control is trying to adapt to whats in frame to achieve the desired size/compression ratio - it will get close but not perfect. That aside I wouldn't expect ~45MB/s unless it was say 4.6K @30fps 12:1

( ( 4640 x 2624 x 12bit* ) / 8 / 1000 / 1000 / 12:1 ) x 30fps = 45.66MBs


*12bit non-linear encoding

Perfect, thanks for the info.