Automatically link a video to a measurement by calculating the
video offset from the GPS time stamps of a 2D GPS module and the GPS
time stamps of the GoPro:sup:`®` to extend the measurement data by
an audiovisual component with frame by frame analysis!
Important
At the moment, the software is able to process twelve videos each from four cameras! If you want to use more cameras, please contact 2D Datarecording via our website!
GPS-channels provided by GPS2CAN or serial GPS are required to use the GoPro® AutoSync feature!
Ensure to record the GPS-channels, especially #SSHH, #HHMM and #MMDD
With different license levels, videos from a different amount of
GoPro®’s can be synchronized to a measurement. With license
level TEAM four GoPro®s with each 16 videos can be
synchronized.
Since the alignment accuracy of the GoPro® video for the 2D
measurement data depends to a large extent on the GPS reception of all
devices, it is important to ensure that all devices involved have
received very good GPS at least at the start of the measurement!
Attention
Only if all preparation steps are carried out conscientiously, an alignment accuracy of far less than 1 second can be achieved!
If the GoPro® Quik software is installed on your computer, please ensure that this software does not start automatically when a data carrier with GoPro® content is inserted. With a special setting, this software would automatically delete the content after importing.
In the following you will find a list that shows with which
GoPro® the automatic synchronization works. Ensure that your
camera is updated to the latest firmware!
Overview GoPro®`s
Hero® 5
Session
YES
2016
Session
NO
2016
Hero® 6
Black
YES
2017
Fusion
NO
2017
HERO
NO
2018
Hero® 7
White
NO
2018
Silver
YES
2018
Black
YES
2018
Hero® 8
Black
YES
2019
MAX®
YES
2019
Hero® 9
Black
YES
2020
Hero® 10
Black
YES
2021
Attention
Please familiarize yourself with the use of the GoPro®, especially with the video settings, as well as the activation of the GPS and display of a GPS connection of the camera.
GoPro® videos can only be automatically synchronized to
measurements that use a GPS module.
It does not matter whether a GPS2CAN receiver or a serial GPS receiver
is used.
Attention
Ensure to record the GPS-channels, especially #SSHH, #HHMM and #V_Sat are important!
Attention
When using a 2D GPS module, it is important that the module has received GPS reception for at least 13 minutes, at best 26 minutes, before a measurement, to receive the latest GPS-Almanac data and thus the alignment accuracy can be guaranteed.
Attention
During this time, the measurement system must only be switched on, no active record is required.
Do not import the measurement and the videos at the same time! Import one behind the other. The order you do that is not important!
Attention
The videos must be on a data carrier called “2D-Stick” or on a stick of any name with a directory “DCIM”!
Attention
Make sure only videos from the respective event are on your data carrier
Insert the USB stick with the measurement as usual with WinARace
open with the correctly selected event and have the measurement
automatically downloaded into the selected event.
If a data carrier with videos is connected to the PC and WinARace
is open or if a data carrier with videos is already connected and
WinARace is then started, the videos are automatically copied to
the current event in the folder Videos.
Important
Only videos that are not already in the Videos event folder are copied!
Important
When copying, information about length, framerate, timestamps (SecondOfDay SOD) and camera are extracted automatically from the videos and stored in AvailableVideos.ini. This ini-file can be found inside the respective event folder inside the folder Videos (<EventDir>\Videos\) and can be opened with a text editor.
The video files are also renamed in the Video event folder (<EventDir>\Videos\) according to the following schema:
Renaming files when copying from SD-card to computer
Open WinARace and select the measurement to which you want to
attach the videos
Click following icon from Toolbar to open VideoCMDLine.exe
By clicking on Automatic all GoPro® videos are automatically attached that correspond to the measurement. The offset is calculated automatically for the respective videos.
In the following figure you can see that all videos except Camera 2 video 2 (Video_File_Index_2=2) would coincide in time with the measurement and therefore all but Camera 2 video 2 would be attached.
By clicking on button OK all loaded videos are synchronized successfully to the measurement and video channels are created according to the following pattern:
The alignment accuracy strongly depends on the conscientious execution
of the steps described in the section Preparations. The processing
time of the camera used also plays a role.
Addtional manual
If the video offset must be adjusted manually, please click here for link to 2D YouTube tutorial!
Due to the temporal assignment of the videos to the measured data, the following scenario is possible:
- Rider 1 has installed a 2D logger on his motorcycle and is wearing a camera with chest strap
- Rider 2 films with a camera on the helmet Rider 1 from behind
- Camera 3 was set up stationary in corner 5
- Camera 4 is attached to a drone and films from a bird’s eye view
During evaluation, the driver can then access videos from 4 different perspectives in addition to the 2D measurement data and thus improve his performance with the various tools of the 2D Datarecording software.
Important
At the moment, the software is able to process twelve videos each from four cameras! If you want to use more cameras, please contact 2D Datarecording via our website!
Important
By using GoPro® MAX camera, with one camera different perspectives of one rider can be achieved, when e.g., creating multiple videos with different views from only one 360-file! If required, please contact 2D Datarecording via ourwebsite!
In comparison to other GoPro® cameras, the GoPro® MAX
is saving its 360° videos in 360-format on SD-card.
Since January 2021, the 2D GoPro®AutoSync feature is also
able to handle videos in 360-format!
Attention
Videos in 360 format can be played by the VLC player but cannot be used in any meaningful way. After editing with GoPro Player the videos are exported as mp4-files
When inserting an SD card with videos in 360 format into a computer,
these videos are treated completely like mp4 files, i.e. when copying
from the SD card into the video event folder (<EventDir>\Videos\),
GPS timestamps are also extracted and saved in AvailableVideos.ini. In
addition, the copied 360 files are renamed according to the previously
described pattern with camera serial number and time information.
Before using the 360-videos in 2D-Analyzer, the renamed 360-files must
be opened and edited in GoPro® Player where the desired views
can be chosen! More information about editing in GoPro® Player
can be found**here**!
Attention
After editing the video, the file must be exported to the video event folder (<EventDir>\Videos\) with the same name as the respective 360 file was called!
Afterwards, the mp4 file can be used like any other GoPro®
video in chapter 5, but steps 1 and 2 must not be carried out.
Time after precision became smaller than limit value
First latitude=49.003264
First latitude=49.003264
First latitude=49.003264
First Latitude
First longitude=8.461552
First longitude=8.461552
First longitude=8.461552
First Longitude
This combination indicates that the GPS was on (Precision entry), but the camera had no GPS reception during the whole video (Precision=9999 & ExtrapolDiff=0)
This combination indicates that the GPS was switched on (Precision entry), but the video started with bad GPS reception, which was then getting better (Precision=493) after 54.002 seconds (ExtrapolDiff=54.002)
This combination indicates that the GPS was switched on (Precision entry), the camera had good GPS reception (Precision=220) from the first sample (ExtrapolDiff=0)
This combination indicates that the camera’s GPS was off (GPS_SOD=0)
The software Dashware can be used in conjunction with the 2D software to
create a measurement data overlay. The recorded data is displayed during
the video using various, freely configurable display options.
Due to the improved usability of the Dashware feature and the automatic
synchronization of GoPro videos in the 2D software, only the channels
need to be selected and a toolbar button pressed to export the
measurement data. Only the part of the measurement data that actually
corresponds to the video is then exported to a csv file. This csv file
is then loaded together with the video in the Dashware software.
