Question 1

How to geotag GoPro videos with an external GPX file using mapillary_tools?

Accepted Answer

Use the command 'mapillary_tools video_process' with --geotag_source gpx and --geotag_source_path, and adjust time synchronization with --interpolation_offset_time if the clocks differ. Refer to the advanced usage section for specific examples and ensure FFmpeg is installed.

Question 2

Can mapillary_tools process 360-degree videos from drones?

Accepted Answer

It supports cameras with GPMF/CAMM telemetry, so if the drone outputs compatible metadata, it might work. However, specific drone formats aren't listed, so check the supported formats or use external GPX files as a fallback.

Question 3

What's the difference between mapillary_tools and uploading manually to Mapillary?

Accepted Answer

Mapillary_tools automates batch processing, handles complex geotagging, and supports multiple formats, saving time for large datasets. Manual upload is simpler for small batches but lacks automation and advanced features like external GPS integration.

Question 4

How to fix 'GPS not found' errors in mapillary_tools?

Accepted Answer

Ensure your images or videos have required EXIF tags like GPS Longitude/Latitude or use external geotagging with GPX files. Check the --geotag_source options and verify time synchronization if using external tracks, as described in the geotagging section.

Question 5

Does mapillary_tools work on Android devices?

Accepted Answer

Yes, through Termux, but it requires moving files to native storage for performance and following specific installation steps. The README provides commands for setting up Python and dependencies on Android, but it's more complex than on desktop systems.

Question 6

What are the limitations of the experimental video geotagging features?

Accepted Answer

Experimental features like --video_geotag_source have limitations, such as no support for time offsets with external sources and potential instability in future releases. They're best used cautiously for non-critical workflows until stabilized.

Question 7

How to install mapillary_tools on a Mac without permission errors?

Accepted Answer

Use 'pip install mapillary_tools' in a virtual environment to avoid permission issues. If you see 'damaged' errors, run 'xattr -c mapillary_tools' to clear extended attributes, as noted in the installation troubleshooting section.

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