Atomos Shogun Inferno?

Jack Zhang · February 25th, 2017, 01:15 PM

I'm liking the 48/50/60hz switchable display refresh rate feature, and of course the certification for PS4 Pro HDR recording. When I get one, I need to find time to test it on a Nvidia Pascal GPU.

Lee Flippin · February 25th, 2017, 02:42 PM

A bit more update on recording FS700R's 2K RAW signal @ 240 fps to Apple Pro Res files with the Inferno...

I'm an amateur, not a pro, so please bear with me...this may not be news to some folks: The Inferno's "Pre Roll" recording function (i.e., same as "End Trigger") must be caching Pro Res file data in its buffer (not the original 2K RAW signal).

Why do I think this?? Well, because I just performed a series of experiments using Pre Roll recording of my FS700R's 2K RAW/240fps signal to the Inferno where I varied the Apple Pro Res codec that the Inferno uses from HQ --> 422 --> LT.

The results: Set to Pro Res HQ, the Inferno gave me slightly less than 1 second of Pre Roll buffer time. At Pro Res 422, it gave me about 1 sec of buffer. At LT, the most compressed of these three codecs, the Inferno gave me about 2 seconds of buffer time on Pre Roll recording of the 2K RAW/240 fps signal.

Next question to answer, and this is obviously a more personal one, is: Is the trade-off of codec quality going to be worth the precious bit of extra buffer time? I sure hope so, because 2 seconds is comfortable while less than 1 second (at HQ) is not a comfortable reaction time for Pre Roll recording.

We shall see...

P.S. Agree completely with Jack Zhang concerning Rolling Shutter....the ruination of pan shots at lower frame rates.

February 25th, 2017, 01:15 PM	#16
Jack Zhang Inner Circle Join Date: May 2005 Location: Burnaby, BC, Canada Posts: 3,053	Re: Atomos Shogun Inferno? I'm liking the 48/50/60hz switchable display refresh rate feature, and of course the certification for PS4 Pro HDR recording. When I get one, I need to find time to test it on a Nvidia Pascal GPU.

February 25th, 2017, 02:42 PM	#17
Lee Flippin New Boot Join Date: Apr 2014 Location: San Francisco, California Posts: 17	Re: Atomos Shogun Inferno? A bit more update on recording FS700R's 2K RAW signal @ 240 fps to Apple Pro Res files with the Inferno... I'm an amateur, not a pro, so please bear with me...this may not be news to some folks: The Inferno's "Pre Roll" recording function (i.e., same as "End Trigger") must be caching Pro Res file data in its buffer (not the original 2K RAW signal). Why do I think this?? Well, because I just performed a series of experiments using Pre Roll recording of my FS700R's 2K RAW/240fps signal to the Inferno where I varied the Apple Pro Res codec that the Inferno uses from HQ --> 422 --> LT. The results: Set to Pro Res HQ, the Inferno gave me slightly less than 1 second of Pre Roll buffer time. At Pro Res 422, it gave me about 1 sec of buffer. At LT, the most compressed of these three codecs, the Inferno gave me about 2 seconds of buffer time on Pre Roll recording of the 2K RAW/240 fps signal. Next question to answer, and this is obviously a more personal one, is: Is the trade-off of codec quality going to be worth the precious bit of extra buffer time? I sure hope so, because 2 seconds is comfortable while less than 1 second (at HQ) is not a comfortable reaction time for Pre Roll recording. We shall see... P.S. Agree completely with Jack Zhang concerning Rolling Shutter....the ruination of pan shots at lower frame rates.