It is hard to tell not knowing your system. What is the speed of your I/O drives? dedicated RAID array for your media? where do you keep your cache memory?
If your crashes happen with a particular file format, I would definitely run a test with “easy footage” for your system (not power intensive in coding/decoding)… like intra-frame codecs (ProRes, DNxHD, Cineform, etc…) This will allow you to tell if there is a direct correlation…
Regarding your question about proxy footage, it depends what is your project like and your goal. If you are editing, it could be a solution, especially with a lot of media. If you are color grading, you want to work with the best quality footage you can get, with as little transcoding as possible in order to minimized any artifacts.
With Resolve, you actually have different ways to manage working with “a slower system”: using the optimized media features, allow you to create new footage that will be easier to work with. It allows you to decide which file format/codec to use. Another way would be to use the cache render feature in order to play footage that otherwise could not be played real time.
David Baud
Colorist & Finishing Editor
KOSMOS PRODUCTIONS
Denver – Paris
http://www.kosmos-productions.com