Here's another workflow posts for you, this time about action cameras that have GPS. I have had my eyes on the Garmin Virb after seeing it at bike races and finally gave it a try.
We have written about flying drones, about working with GoPro cameras, where you have to sync the photos to locations recorded with an external GPS or phone. (There is a script for that, see this post.)
With a GPS enabled action camera you can skip all that. I'll use a bike handle bar as example.
A Garmin Virb attached to a bike with the GoPro bike mount.
Here's the process:
- Attach the camera (I like the GoPro bike mount kit, you can also try 3D printing these).
- Check the preview to see that the photos are straight and the horizon is where you want it (I like mine in the middle).
- Set the camera to 2s interval time lapse. On the Garmin Virb, you can turn on wide angle straightening, this is a good idea.
- Start riding and start the camera.
- Stop and start when it makes sense to do so, at natual sequence gaps or when there is sometheing you don't want to capture.
- When you are done riding, copy the photos over to your computer. Look through them quickly and delete the bad ones.
- Before uploading the photos using the web uploader, it is useful to organize them in sequences since the uploader needs all photos in a sequence at the same time. I made a script for that, just download it here. Run it like this:
$ python sequence_split.py virb_test Organizing into 15 groups. Moved 32 photos to virb_test/0 Moved 42 photos to virb_test/1 Moved 10 photos to virb_test/2 Moved 36 photos to virb_test/3 Moved 46 photos to virb_test/4 Moved 30 photos to virb_test/5 Moved 11 photos to virb_test/6 Moved 25 photos to virb_test/7 Moved 154 photos to virb_test/8 Moved 54 photos to virb_test/9 Moved 29 photos to virb_test/10 Moved 84 photos to virb_test/11 Moved 70 photos to virb_test/12 Moved 59 photos to virb_test/13 Moved 27 photos to virb_test/14 Done grouping photos.
- With photos captured in time lapse mode the script automatically finds the cutoff points and copies the photos into subfolders for you.
- Open the web uploader, click "Choose Files" and select everything in one of those folders. You will then see them on a map, where you can check that everything is ok and remove unwanted photos.
- Click "Upload To Server" and when all markers are green, push to Mapillary.
- Repeat until all folders are uploaded.
Hope this is useful for our bikers and motorcyclists out there. If you have other workflow tips, blog, tweet or email us.