Quote My PD365 is able to smart render my Gopro Hero7 1520p50 footage. Of course when there is a transition between two clips, this part has to be rendered. My issue is that there is a viewable change in brightness (or level change from 0-255 to 16-235) during the newly rendered transition part and the smart rendered video parts. Is there a way to avoid this?

Some forum users swear by it, I generally cuss at it. SVRT could be a big boost, however, for me it's still a multi year work in progress. I've had way too many issues with SVRT and my footage to rely on it for final production of a edited timeline. Another issue same as yours was shown here: https://forum.cyberlink.com/forum/posts/list/83469.page#post_box_344545 . Additionally I've had many audio issues, previously shown here: https://forum.cyberlink.com/forum/posts/list/15/29236.page#post_box_165087 and additionally have had a frame sequencing issue near the transition, it would back step a couple of frames and then fwd. For casual viewer it appears ok but details often apparent on examination.

The niche SVRT use that works well for me, if I pre produce sections of a overall editing sequence and then combine these sections with no further editing to produce.

Best one can probably do is contact support with a link to your complete packed project.

Jeff