Gopro Hero 8 Black Video Sampling

Contributing and equipment Action cameras
1

Hi,
According to instruction here I run this command:

mapillary_tools video_process --import_path “path/to/images” --video_import_path “path/to/videos” --user_name “mapillary_user” --advanced --geotag_source “gopro_videos” --geotag_source_path “path/to/videos” --interpolate_directions --video_sample_interval 0.5 --overwrite_EXIF_gps_tag

image frames extracted from video but images does not have geo tags with this error:

Running geotag_process for 60 images, skipping 0 images.
It is assumed that the image timestamps are in UTC. If not, try using the option --local_time.
Inserting gps data into image EXIF: 0%| | 0/60 [00:00<?, ?it/s]Warning, time t not in scope of gpx file by 1591617283.33 seconds, interpolation of latitude and longitude failed for image c:\mp\m\2\i\mapillary_sampled_video_frames\GX011994\GX011994_000001.jpg
Warning, time t not in scope of gpx file by 1591617282.83 seconds, interpolation of latitude and longitude failed for image c:\mp\m\2\i\mapillary_sampled_video_frames\GX011994\GX011994_000002.jpg
for all images I have same error!
any one can help solve the problem?

2

That number of seconds is the time from the Unix epoch. It kind of implies that whatever mechanism you had to determine video creation time is seeing zero. I have seen another post that suggests an error may exist in the tools over this.

As a workaround try adding the switch --video_start_time and the epoch time for the start of your video.

3

Thank you bob3bob3
How I find exact epoch time?

4

Epoch time is the number of seconds that have elapsed since January 1, 1970 (midnight UTC/GMT). Here is a website calculator if you wish to do it one at a time https://www.epochconverter.com/

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