Video sync doesn't always work with modification times

[firecat53]

There's an issue with the video file syncing based on the modification times. The threshold is 1 second between modifications times, but I have a lot of files that have been untouched for years and continually get deleted and reuploaded because there's a >1 sec difference between the metadata values grabbed for modification times. There's always that difference, no matter how many times it gets re-uploaded.

In addition, hachoir-metadata is detecting the modification date as 1946 for a number of my video files that have a 2012 date. Other tools like exiftool correctly extract the modification date. Hachoir also is unmaintained and should probably be replaced by another library such as ffmpeg-python.

[firecat53]

Moved off of Smugmug. Will leave this open in case others are interested.