Possible missing card

A hatched band on a camera track is not empty time. It is a warning: some of the footage may not have made it.

A hatched gold band between GoPro clips on the V4 track — A gap in the GoPro file numbering over a stretch that other cameras were recording.

If there is a gap in a camera's file numbering over a stretch longer than twenty seconds, and other cameras were recording at that time, the app draws a hatched band in that place. Hover it: Possible missing card, V4 has a gap other cameras were rolling through. Right after the sync a message at the bottom reminds you as well.

A camera that simply paused gets no band: if the file numbers run consecutively, that is a pause, not a gap. So when the band is there, it is worth checking the card or the copy.