Some DJI drones provide the option for generating SRT (subtitle) files accompanying movie files recorded by the drone. When viewed in a video player these will elegantly annotate the video with GPS position and other metadata. If one wishes to view this flight log on a map or do other geographical post-processing, a more established GPS log format like GPX has much better support in 3rd party software. This script lets you do straightforward conversion from the former to the latter.
### Features
* Converts .SRT files containing GPS coordinates to GPX files
* Preserves non-geographic metadata (such as exposure level and air pressure, varies by DJI drone model) in the `extensions` tag under `dji:` namespace. While this option will keep the extra metadata included in the SRT files during conversion, it won't be of much use unless you plan to write custom software for analyzing this data. For more common use cases it can be left off which will result in smaller GPX files.
