While delivery formats often use P- and B-frames, editing and recording formats often go all-intra. e.g., the Sony FS7 only supports all-intra XAVC-I for record

While delivery formats often use P- and B-frames, editing and recording formats often go all-intra. e.g., the Sony FS7 only supports all-intra XAVC-I for recording at full resolution and framerate. Personally, I use ProRes 422 for recording, and DNxHD/DNxHR for proxies (and that's only because DaVinci Resolve's free edition can't create ProRes Proxies). Both of these codecs are all-intra formats in mpeg containers.