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  • Hey all, just changed over the backend after 15 years I figured time to give it a bit of an update, its probably gonna be a bit weird for most of you and i am sure there is a few bugs to work out but it should kinda work the same as before... hopefully :)

Variable frame rate always on?

R

Raji Barbir

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I've both Googled and searched this forum, and couldn't find anything on this.

I'm shooting on my Epic MX at 23.976fps and the "Varispeed" option is not on, but when I play it back in REDCineX-Pro, the frame rate is constantly changing, ranging from around 20-22fps to 24.00fps. Why is that? Is this a function of REDCineX-Pro's playback engine trying to keep up or is the Epic actually recording at a variable frame rate? Or maybe there's technical stuff about the 23.976 frame rate that I don't understand?
 
Raji Barbir said:
I've both Googled and searched this forum, and couldn't find anything on this.

I'm shooting on my Epic MX at 23.976fps and the "Varispeed" option is not on, but when I play it back in REDCineX-Pro, the frame rate is constantly changing, ranging from around 20-22fps to 24.00fps. Why is that? Is this a function of REDCineX-Pro's playback engine trying to keep up or is the Epic actually recording at a variable frame rate? Or maybe there's technical stuff about the 23.976 frame rate that I don't understand?
Click to expand...

Without being in front of your machine, I can't be 100% sure...but I'd say I'm 99% sure it's because your computer can't keep up. Have you looked at the metadata window to get information about the clip? It will almost certainly say 23.976.
 
Brendan_H_Banks said:
Without being in front of your machine, I can't be 100% sure...but I'd say I'm 99% sure it's because your computer can't keep up. Have you looked at the metadata window to get information about the clip? It will almost certainly say 23.976.
Click to expand...

Yep... Hadn't thought to look at the metadata. It does say 23.976 for both the project settings AND the recorded framerate. I need a RED Rocket! My GeForce GTX 980Ti is great for games, not as fast for editing.
 
Gareth Place said:
1:

http://www.reduser.net/forum/showthread.php?79183-Shooting-in-Wrong-Timebase

2:
Your workstation will buffer as frames debayer from sensor data to preview. Need a red rocket to preview real time. Try change resolution to 1/16 - PG 15

http://s3.amazonaws.com/red_3/downloads/manuals/REDCINE-X_PRO/REDCINE-X_PRO_Operation_Guide_Build-35_Rev-C.pdf
Click to expand...

Thank you both for the quick response and reference links. I've always had to run at 1/4 resolution for playback, but I just tried running at 1/16 and watched the playback frame rate, and it does seem to stay more steadily at around 24fps at that resolution.
 
Raji Barbir said:
Yep... Hadn't thought to look at the metadata. It does say 23.976 for both the project settings AND the recorded framerate. I need a RED Rocket! My GeForce GTX 980Ti is great for games, not as fast for editing.
Click to expand...

Do you have CUDA installed and have it turned on for RCX? I find that 5k stuff plays back at near real time at 1/2res on my GTX1080.
 
Raji Barbir said:
I'd never heard of CUDA before... Thanks for the tip! Downloading the 1.3GB file now, although I'm struggling to understand how it operates or what it does exactly, even after having read this: https://blogs.nvidia.com/blog/2012/09/10/what-is-cuda-2/
Click to expand...

I don't have a hard-core technical understanding of it, but here's my best shot at an explanation: it's a structure and computing system that directly correlates to how your graphics card actually works. This means you'll see the best performance when CUDA is enabled on Nvidia cards, and when OpenCL is enabled on AMD cards.

After you install the CUDA elements on your windows machine, open RCX. Go to Edit > Preferences. Click on SYSTEM on the left side of the dialogue box. In the options on the right, under GPU MODE SELECTION, choose CUDA. It should then see your 980TI card. Hit OK and restart RCX. You should hopefully see a bump in performance almost immediately.

If you cut in Premiere, go to File > Project Settings. Under RENDERER, choose Mercury Playback GPU Acceleration (CUDA). Also, if you use Adobe Media Encoder, there is a similar RENDERER choice in the bottom right window of the batch list. Choose CUDA.

You should see your investment really paying off. Let us know how it goes!
 
Thanks a bunch Brendan: RCX can manage playback at 1/2 resolution now (barely) and buffers way more than it used to on 1/4 resolution. That's way better! I usually color in RCX and edit in Premiere. I have CS6 though, so I'm still working on figuring out the workaround. I expect it'll be much faster there as well, thank you!
 
Raji Barbir said:
Thanks a bunch Brendan: RCX can manage playback at 1/2 resolution now (barely) and buffers way more than it used to on 1/4 resolution. That's way better! I usually color in RCX and edit in Premiere. I have CS6 though, so I'm still working on figuring out the workaround. I expect it'll be much faster there as well, thank you!
Click to expand...

CS6????? Raji.. move to Creative Cloud or you will struggle.. and the struggle will be reel.


to clarify.. your card has 2816 CUDA Cores... the CUDA support has been getting better and better every major update for years..
CS6 came out in 2003.. the last time CS6 was updated/supported by adobe was MAY 2012.. 4 years ago..

your video card is perfectly fine. You need the correct software
 
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