![]() I'd also expect that some applications are less optimized for decompression compared to others. You don't just save storage, you also lower the need for extreme storage speeds for playback since the files are smaller. I think 1) is nicely offset by the fact that with lossless compression storage bandwidth requirements are substantially lowered. The couple of potential downsides I can think of are: 1) if you are using a weak CPU, you can get slower playback compared to uncompressed 2) if in your workflow you are using some video application which can't read losslessly compressed CinemaDNG, obviously it won't read the files. If you are processing uncompressed raw, the CPU is mostly idling. ![]() Decompression and debayering just mesh together well. In general, losslessly compressed raw plays very nice with balanced GPU+CPU systems because while the CPU decompresses, the GPU debayers in parallel. (One reason R3D files rock, is the variable compression ratios)The GPU doesn't come into play with CinemaDNG lossless compression/decompression beause lossless compression is not GPU friendly and I don't think any video application uses the GPU to decompress. This could be an amazing program for anyone shooting 7Q raw. ![]() ***just read over the site, and am downloading to try the trial right now. (Maybe just more work for CPU/GPU to decode and uncompress each frame while live playback/editing? Kinda like h264 has to do, just on a RAW scale) So, are there any downsides at all to this? 'Losslessly Compressed" seems to sound like there is no downside at all. ![]() In any case, it is best to just run some frames from your footage to see what compression levels you can expect for your own video. That's because it lacks an OLPF, resulting in generally sharper and/or aliased footage, which compresses less compared to the other cameras. While these numbers are from deliberately varied input (selected single frames from clips, so that numbers aren't skewed by longer clips), they are by no means entirely representative. I wonder what the file size reductions will be in real life.Here is a record of some of my test footage, sorted from highest to lowest compression:įS700 mix of 4K and 2K on the 7Q: compression ratio 2.67:1, or size down to 37.4%Ĭanon DSLR ML raw (assorted cameras, but mostly 5dm3): 1.96:1, down to 51% ![]()
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