Has anyone done or seen any tests comparing Apple ProRes 422 with high-bitrate H.264?
We use 422 as a delivery format to go to DCP for theatrical versions of trailers. The bitrate is around 150mbps.
We are wondering if it is possible to reach adequate quality with H.264. Say, with bitrates of 50-100mbps, and tweaking the GOP size/structure. (E.g., only using "I" frames.)
Assuming H264 is a more "efficient" codec, we are hoping to get smaller file sizes.
Or does H.264 just not have the color depth to compete?
It would be great to see if someone has done some real-world testing.
Update 1: I just did a quick test using 50mbps, GOP size 1, I-frames only ... and "by eye" I see no difference whatsoever. Same level of noise, same colors. The ProRes is 1.92GB, the H264 is 566MB. How would one "test" the difference technically? Or measure the color information?
Update 2: I did some more testing ... with Adobe Media Encoder, using MPEG2, and the "4:2:2" profile, the ProRes file went from 1,920MB to 290MB! And I would say, subjectively, that is is 99% as good. This is remarkable. (With H264 I was down to 500-700MB)