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Author Topic: 50 Fps Playback!
Lucas Iaccarino
Film Handler

Posts: 34
From: capital federal, buenos aires, argentina
Registered: Feb 2015


 - posted 03-06-2018 04:41 PM      Profile for Lucas Iaccarino   Email Lucas Iaccarino   Send New Private Message       Edit/Delete Post 
Hello

I`m writing you today because I`m going to receive a 50 fps DCP and i am asking myself if I`m going be able to playback it. Actually I`m operating with Doremi ShowVault (IMB) and Dolby Dss220, but I had been before in problems with some DCP with bitrates over 250 Mbps

The projectors are all SERIES 2, so I think that everything is going to be Ok.
What would you say?

Thank!

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Carsten Kurz
Film God

Posts: 3680
From: Cologne, NRW, Germany
Registered: Aug 2009


 - posted 03-06-2018 05:45 PM      Profile for Carsten Kurz   Email Carsten Kurz   Send New Private Message       Edit/Delete Post 
Should work on both machines. Neither the Doremi IMB nor the Dolby CAT745 should have issues with data rates >250MBit/s. I think the Doremi IMB maxes out around 450MBit/s. For the CAT745, I have never seen an 'official' max decoder data rate, but it should cope with similar rates easily.

The Dolphin/HD-SDI boards did not like rates close to 250MBit/s.

As common 2k/3D uses 48fps at below 250MBit/s, it is probably not even necessary to go beyond that number for 50fps 2D.

- Carsten

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Steve Guttag
We forgot the crackers Gromit!!!

Posts: 12083
From: Annapolis, MD
Registered: Dec 1999


 - posted 03-07-2018 06:26 AM      Profile for Steve Guttag   Email Steve Guttag   Send New Private Message       Edit/Delete Post 
The CAT745 should be good up to 500Mbit/s. 50fps is also listed as a supported frame rate for the CAT745 (and the CAT862, for that matter).

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Carsten Kurz
Film God

Posts: 3680
From: Cologne, NRW, Germany
Registered: Aug 2009


 - posted 03-08-2018 06:13 PM      Profile for Carsten Kurz   Email Carsten Kurz   Send New Private Message       Edit/Delete Post 
Theres a remark in the Dolby 4.9.096 release notes concerning 50fps, but I am not sure wether that actually affected 50fps playback in pre-4.9 versions:

---
Fixed an issue that incorrectly marked 50 fps as unsupported on the CAT745 media block. This frame rate is now correctly supported.
---

- Carsten

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