I shot my film with a Canon C300, i transcoded my files to DNX 36 in order to edit easily with small files, however, now I want to re-transcode the edited sequence into 1:1 10b to have the best quality for the coloring. Is it possible to transcode a previously transcoded sequence? or I should create a new track and edit the project again and transcode the files into 1:1 10b?
It is an 8-bit camera. DNx175 is a good choice, or 145 (depending on the frame rate). 175X is 10-bit, and that is fine.
OR...if you want lossless, just relink to the original source and consolidate. The C300 shoots XDCAM 422 in the MXF format. If you consolidate, you simply make it into Avid MXF media (no recompressing) and put it into the Avid media file structure. Zero quality loss.