h.264 level 5.1...

[Casey Krugman]

So i'm hoping some serious video engineers see this and can help me out.

So, I've been doing a LOT of research surrounding h.264, and I had a question. Is there any way that anybody could think of to capture either 1920 x 1080 up to 120fps or 4k up to 24p directly into an H.264 codec High Intra 422 profile at level 5.1?

I mean, the spec is there, and there are certain cameras that use level 5 (5dm2), but thats only Mainline profile.

Any thoughts?

[Casey Krugman]

I mean Cricket AND tumbleweeds? Anyone? Anyone?

Bueller?

Fry?

[Jack Zhang]

The problem right now is encode power. High profile has a LOT more complex coding to encode the stream and 4K is mostly captured in formats with a lot less compression (such as HDCAM SR or Cineform).

There is no possible way to encode that much data in real time without an energy-hogging dedicated encoder chip, and the TDPs for the encoder chips at the moment don't have that much power. Not to mention you'll need at least a Core i7-980x to decode that much data without dropping frames.

Another problem is the problem of people using less compressed formats for acquisition instead of H.264. When it comes to having the max amount of quality, pro cameras like the RED camera were made for less compressed formats.

I can see why you would think this is a way to make a DSLR equal to a RED, but with current efficiencies, a DSLR couldn't film a minute with 1080p120 @ level 5.1 specs on High profile without overheating. It will take a few more dye shrinks to encoder chips and by the time that happens, a better and more efficient codec will be in use.

And finally, the MPEG-LA owns the patents for H.264 and who knows when they may start excessively charging for the codec...

[Casey Krugman]

It's not even about the red or a dslr or even 4k... what interests me more is the idea of 1080p at 120fps! In a small body, hell it might be possible with 5.1. I know that this will take a lot of power, and processing, but come on... 120fps!