Re: Get the shooting frame rate of time lapse MP4 files
on 12-14-2019 09:57 AM
Thanks all. I had assumed that this must be encoded into the GoPro metadata somewhere, but it looks like the only way to deduce this is in the MP4 wrapper structure where the meta track's header duration has the actual shooting (long) duration. That seems to be how MediaInfo is also deciding on the value in its "General" section. All other durations in the MP4 structure including the movie header are the playback (short) duration.
This doesn't strike me as very reliable. It would have been much better if the shooting frame rate (or secs between frames) had been stored properly in the GoPro metadata. But this seems to be the only way to do it, unless someone from GoPro comes up with a better way.