openjpegenc: prefer JPC src caps by default
JPC is a tiny bit more efficient as it doesn't have the 8 byte JP2C box. Also, in MPEG TS use case, the parsing is simpler, as MPEG TS expects JPC
JPC is a tiny bit more efficient as it doesn't have the 8 byte JP2C box. Also, in MPEG TS use case, the parsing is simpler, as MPEG TS expects JPC