Foolcat aims to support any file in a QuickTime or MXF wrapper – files with an .MXF .MOV, .MP4, .MPEG, MTS, MKV .BRAW, .R3D, .ARX, .ARI extension (excluding encrypted files). That includes ProRes, DNxHD, DVCProHD, H.264, H.265 (HEVC), Apple Intermediate, Blackmagic RAW, RED R3D, and ARRIRAW.
You can best try out how well your format is supported by simply using Foolcat. Even in trial mode, Foolcat will always generate stills and metadata.