![]() The speed and number of satellites-in-view are also shown in the Graphs.Ī few caveats when working with SRT files: DroneViewer will process the data and you’ll see your drone’s flight path and current position as the movie plays. Drag one of your movies into the DroneViewer window or select Open Movie File from the File menu. Make sure the SRT file is in the same directory as your movie and has the same root name. The SRT file contains the flight trajectory information. This will make the drone create an SRT file for each movie. Also, choose H.264 video encoding because H.265 (HEVC) is not supported on all devices at this time. In the DJI Fly App, be sure to turn on Video Subtitles. Turn on Video Caption in your DJI Go App settings to have your UAV create SRT files alongside your movie files Before your flight, be sure you turn on the Video Caption option in the Go or Fly App camera settings. If your DJI drone is controlled by the DJI Go App or DJI Fly App, then you can easily import your flight trajectory into DroneViewer via the SRT file. Importing drone flight data from a DJI SRT file ![]() It will do this until all movies have been played. When DroneViewer reaches the end of the movie it will jump to the next movie in the list and continue playing. By default files are loaded according to file modification date (this can be changed to name ordering in the Preferences). For example, DroneViewer would expect to find the file DJI_0007.GPX, DJI_0007.SRT or DJI_0007.CSV if the movie DJI_0007.MP4 was loaded.ĭroneViewer will begin playing the first movie in the folder or in the list of movies that was selected. In order for DroneViewer to associate the movies with the correct data files, the data files must have the same base name as the movie files. DroneViewer will look for GPX, SRT (DJI), ASS (Autel) and Flytrex CSV data files in the movie file directory. Run DroneViewer and load your drone’s movie files through the File menu or through the Open Folder, or Open Files toolbar button. These methods are described below: Loading movies and data The GPS data was recorded using a FlyTrex Core 2.Ĭurrently DroneViewer can accept GPS data from drone footage in four forms: DJI’s SRT file (Mavic Pro, Mavic Pro 2, Phantom 3,4), Autel EVO, GPX file, and FlyTrex Core 2 file. The video was captured using a GoPro Hero 3 Pro mounted to a DJI Phantom 2. You can then export your GeoTags to an Excel file for review and analysis. Below is another example showing DroneViewer used for post-flight examination of drone video.ĭroneViewer being used to survey an oil field for leaks. The LOS distance of the drone from the operator was 1.5 miles at this point in the video. The lower-mid Dashboard display shows the speed distance, heading, position, and number of GNSS satellites in view. The graph in the bottom-left shows the UAV speed versus time. In this case the tags represent the locations of the two oil rigs, Emma and Eva, which are not shown in Google Maps. GeoTags, shown in the Map and in GeoTags list on right, show key points of interest and distances to the UAV. This can be used to show your distance from the operator, as shown below: The GeoTags also display the line-of-sight (LOS) distance from the tag to the current drone position. You can GeoTag key points in your video to mark their positions on the Map and return to those points at any time. With DroneViewer you can see exactly where your drone was on a Google Map at the time of video capture. I will clean up and publish the source code for anyone to contribute when I get some spare time.The combination of DroneViewer and drones makes for a powerful duo. Please share anything fun you visualize with it, report bugs, suggest new features and send me your drone's logs if they are not supported yet. Accuracy is still an issue DJI should address, but I find it fun to visualize the paths of my flights and get an approximation of speeds, distance and so on.įeel free to test the tool I created. It turns out they can provide some interesting information if you combine data entries to smoothen the paths, speeds and so on. I decided to give them a try, and have been playing with ways of visualizing them. ![]() They appear when you turn on "Video Captions" in the Go4 App, but they are not very accurate (not enough location digits are included, only recorded once every second.), so not many people have been using them for anything. ![]() SRT logs have been there in our SD cards for a while.
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