Claudio, you must be changing the format from 50/60P.
If you stay with the SAME format, and use SVRT, there is NO encoding, other than for the duration of a transition, title etc. Thus your video quality is that of the source, camera etc.
I burn externally to BR 60P and have the original camera PQ.
Try recording in the final format you burn.
Eugene
Gene
73s, WA6JZN ex DL9GC
CYBERLINK PLEASE ADD UHD BLU RAY BURNING SOFTWARE
PD14,
Win10,64bit.CPU i7 6700,16GB ,C= 480 GB SSD ,GPU GTX1060 6GB 1 fan. Plus 3 int, 4 ext HDD's for video etc.LG WH16NS40 reads UHD.
4K 24" ViewSonic monitor.Camera Sony FDR-A