I am working with Sony XDCAM EX footage am wanting to end up with a ProRes 422 timeline. About a third of my footage is shot with GoPros that have a H264 codex. Should I use a ProRes 422 timeline or XDCAM EX 30P timeline. And use the compressor to convert the H264 footage?
Convert the GoPro footage to ProRes, and use a ProRes timeline. Don't try to use the GoPro footage native, especially in an XDCAM timeline. It has to be converted. And when mixing formats, always use a ProRes timeline.