sometimes I add very simple effects to videos (files are already in video format). For example I just add simple fade in / fade out effect in the beginning / end of the video like in the image below:
However this rerenders large portions of the video which haven't been edited at all hence adding these simple effects can be very time consuming. The frames between the gamma cross strips actually don't need to be rerendered. So my question: Is there an approach to skip these frames in order to save some time? (As I said the file is already in a video format, no image sequences availabe)
Thanks in advance !