Ursa Mini 40 frames max in prorez 422 4.6k

Hi

Im can not manage to do higher framerates in prorez than 40fps in 4.6K. While in Raw 4:1 it is no problem to go to 60fps. The Manual states it should be possibel for 422 and HQ too.

Am i missing something?

What card are you recording with and how did you format it? What camera firmware are you using?


Sent from my iPad using Tapatalk

Hi Rick

Im using Lexar 3400x, Raw is not a problem with theese cards so prorez should not be. firmware is the latest and the UM Mini and UM Mini Pro behave the same.

its only possible in 4K and below not 4.6K to go higher than 40.

I was under the impression, you only could record 4.6K in Raw, ProRes is 4K and below.
Cheers

Thomas, I misinterpreted your post. 10bit ProRes (422 flavours) is limited to 40 fps in 4.6K 4608x2592. 12bit ProRes (444 flavours) is limited to 30 fps full 4.6K. So you're getting what is expected. See page 25 of the URSA Mini camera manual.


Sent from my iPad using Tapatalk

Thanks Rick.
Cheers

Rick, I must have missred the manual.... shame on me . Do we know why this limitation exists?

Processing overhead.

Thomas, the higher the resolution (4.6K vs 4K or UHD/2K) the larger the file sizes are, and require more Video processing power to handle them with the small compression of ProRes, which also requires processing overhead, that Raw does not. BM RW is actuall a 3:1 compression, so file sizes are more manageable in the camera and in post. Also, shooting 4.6K plus processing creates more heat, the faster you drive the frame rates up.

Smaller cameras like the Sony FS6/7 Nd the Panny EVA-1 work with more compressed codecs, and can attain higher frame rates -- in Video everything is a trade off -- high quality equals bigger camera/processing and slower frame rates for a given file size.
Cheers

thanks guys, makes sence.