[Nathaniel J opgenorth]

Actually someone saying they recorded RAW video on a Canon DSLR isn’t that out there anymore with Magic Lantern…that said I naturally assume its meant that its H264 unless someone specifies other in the post. In the case of H264 I don’t need to repeat what others have said 100x in this thread but Canon RAW from Magic Lantern is a 14-bit (well 14-bit padded to 16-bit) DNG image sequence with no chroma subsampling so it takes full advantage of ProRes 4444 from the start (minus the alpha channel of course). 12-bit 4:4:4 in a compressed format is SOOO nice when working from high quality sources, apart from image sequences I can’t think of a better codec thats similar.

For H264 I usually start at ProRes LT or ProRes SQ and if I start to go through more than 3 generations I just subsequently render out ProRes HQ but I’ve done compression tests in photoshop to compare the loss of info over multiple generations and its quite impressive. For any skeptics just open up Photoshop CS6 or whatever version you have and take screen shots of your original footage and your ProRes footage and make two layers, set the ProRes footage to difference and then adjust the exposure and you’ll see compression artifacts. I was plain shocked to see how miniscule the difference between codecs was, I’m convinced ProRes HQ is 95% as good as Uncompressed 10-bit 4:2:2 and I’m quite happy as Uncompressed 10-bit is so beyond my storage capacity for anything but tiny projects. I might post a video showing how to do this in Photoshop and then pictures for comparison but its likely someone already has done this.

Anyways that was an old post so I digress…happy shooting>editing>enjoying!