I recently started recording my FPV flights and to help me tune my PIDs, I thought I would try overlaying BlackBox data on the video. The flight controller I am using – the XRacer F303 V2 has 16MB (Megabytes, not Megabits) of dataflash, allowing me to log almost one entire flight, even at 1/1 logging at 4 kHz. The method I originally attempted was the one described in Oscar Liang’s blog post. After waiting a LONG time to render the frames, I ended up with over 13000 pictures that would need to be stitched together. I did not want to spend money on Quicktime Pro to do this and the free tool I was using – Sequimago; wasn’t able to handle so many pictures at once. I managed to stitch together 20 seconds of video, then I had even more trouble trying to overlay it on the flight video.
While going over the log again, I suddenly realised that Blackbox Explorer extension for Google Chrome had an “import video” option. This was far easier to use than the procedure I was trying earlier. Here are the steps you need to follow to overlay Backbox data on your flight videos: