- Joined
- Jul 15, 2017
- Messages
- 38
- Reaction score
- 22
- Country
- Poland
- Dash Cam
- Blackvue DR650S-2CH / Viofo A119 V3
Hi All,
I have ordered a sample and looking forward to use it as a replacement for my Blackvue DR650S with Mapillary and Openstretcam
I am an active Mapillary and Openstreetcam contributor and I would like to optimize my workflows to sample and process (geotag) imagery from B4K.
Mapillary tools (open-source command-line tool developed and supported by Mapillary and community) provides native support for GoPro family actioncams and Blackvue DR900S dashcams -
it can sample video clips to individual frames (images) at a given rate (i.e. 1 frame per second, or 1 frame per 2 seconds), extract the metadata and geotag resulting sequences preparing them for upload.
All other dashcams/action cams require additional steps: sample video in frames, get the GPS log from external app/file, synchronie the two and geotag resulting sequences.
I am doing it like this for DR650S with external GPS logger, while built-in one was not reliable.
But having in mind that B4K stores GPS metadata within the file (similar to GoPros and BV DR900S), I am keen to optimize and automate workflow with mapillary tools by adding support for B4K.
I have already contacted Phil Harvey (Exiftool author) and Mapillary devs, but they were not able to quickly find the trace of GPS metadata within B4K TS sample files.
(I have used raw file from this post https://dashcamtalk.com/forum/threads/updated-iq.43849/ , thanks @SawMaster )
Maybe someone has some specs on how/where GPS metadata is stored in B4K TS files?
I can see that metadata is there (using GPS player from Blueskysea and DVplayer has also added B4K support recently)
@estore009 , can you help here?
I really want to spend some effort on promoting B4K among Mapillary contributors community as it seems to be excellent alternative to DR900S (4 times cheaper!)
And couple of additional questions to the owners (while I am waiting for delivery):
1. Does GPS metadata stored somewhere in the external files apart from TS video itself on B4K?
2. If yes, can you please share a sample?
Many thanks in advance!
I have ordered a sample and looking forward to use it as a replacement for my Blackvue DR650S with Mapillary and Openstretcam
I am an active Mapillary and Openstreetcam contributor and I would like to optimize my workflows to sample and process (geotag) imagery from B4K.
Mapillary tools (open-source command-line tool developed and supported by Mapillary and community) provides native support for GoPro family actioncams and Blackvue DR900S dashcams -
it can sample video clips to individual frames (images) at a given rate (i.e. 1 frame per second, or 1 frame per 2 seconds), extract the metadata and geotag resulting sequences preparing them for upload.
All other dashcams/action cams require additional steps: sample video in frames, get the GPS log from external app/file, synchronie the two and geotag resulting sequences.
I am doing it like this for DR650S with external GPS logger, while built-in one was not reliable.
But having in mind that B4K stores GPS metadata within the file (similar to GoPros and BV DR900S), I am keen to optimize and automate workflow with mapillary tools by adding support for B4K.
I have already contacted Phil Harvey (Exiftool author) and Mapillary devs, but they were not able to quickly find the trace of GPS metadata within B4K TS sample files.
(I have used raw file from this post https://dashcamtalk.com/forum/threads/updated-iq.43849/ , thanks @SawMaster )
Maybe someone has some specs on how/where GPS metadata is stored in B4K TS files?
I can see that metadata is there (using GPS player from Blueskysea and DVplayer has also added B4K support recently)
@estore009 , can you help here?
I really want to spend some effort on promoting B4K among Mapillary contributors community as it seems to be excellent alternative to DR900S (4 times cheaper!)
And couple of additional questions to the owners (while I am waiting for delivery):
1. Does GPS metadata stored somewhere in the external files apart from TS video itself on B4K?
2. If yes, can you please share a sample?
Many thanks in advance!
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