Eddie doesn't support (YET!) formats/codecs such as Blackmagic's BRAW or R3D/RED.
We hope to soon. And please let us know (or add to our feature request board) which formats/codecs you want us to support as it helps prioritize it on the roadmap.
How to use Eddie with unsupported video types? Create proxies! Here's how:
Transcode your videos to h264/h265 MOVs and ensure the proxies keep the same start timecode, framerate, and resolution. This way when you go from Eddie back to your video editing application, all your. media will relink and then you can replace your proxies for your original videos.
Why .MOV? Because MOV support timecode; MP4 does NOT support timecode.
Now you can use Eddie with your unsupported footage via proxies.
Let us know if you have any questions.
Other:
Here's a good article on how to work with proxies / source in Final Cut Pro
Here's a post for how to relink proxies in Adobe Premiere Pro back to the source footage
Here's a video (start at 1:40) for how to relink proxies in DaVinci Resolve back to the original source footage