Omitted some sample_video commands - Note the video start time. This is essentially the first video frame. Just point the camera at the GPS device display, then delete those “bad images” after process but before upload.
usage: see -h for available tools and corresponding arguments, add --advanced to see additional advanced tools and/or arguments and --version to see version. sample_video
[-h] [–advanced] [–version] [–verbose] [–import_path IMPORT_PATH]
–video_import_path VIDEO_IMPORT_PATH
[–video_sample_interval VIDEO_SAMPLE_INTERVAL]
[–video_duration_ratio VIDEO_DURATION_RATIO]
[–video_start_time VIDEO_START_TIME] [–skip_subfolders]
optional arguments:
-h, --help show this help message and exit
–advanced Use the tools under an advanced level with additional
arguments and tools available.
–version Print mapillary tools version.
–verbose print debug info
–import_path IMPORT_PATH
path to your photos, or in case of video, path where
the photos from video sampling will be saved
–video_import_path VIDEO_IMPORT_PATH
Path to a video or directory with one or more video
files.
–video_sample_interval VIDEO_SAMPLE_INTERVAL
Time interval for sampled video frames in seconds
–video_duration_ratio VIDEO_DURATION_RATIO
Real time video duration ratio of the under or
oversampled video duration.
–video_start_time VIDEO_START_TIME
Video start time in epochs (milliseconds)
–skip_subfolders Skip all subfolders and import only the images in the
given directory path.