Most First Person View (FPV) aircraft have two cameras. One of those cameras is typically an action camera such as a GoPro or Mobius. Its job is to record the flight in unflinching high definition. The other camera is a small security-type camera which creates the video feed that is downlinked to the pilot's goggles or monitor. Although the latter cameras offer much less in the way of image quality, they work well for downlink because they adapt quickly to changing light conditions and provide very low signal latency. Today, we'll look at solutions to record video from those cameras.
When it comes time to share video of our FPV flights, we typically reach for the GoPro footage. After all, what's the point of schlepping around an extra camera if you're not going to utilize the hi-def footage that it collects? There are times, however, when you may want to record the downlinked video from your FPV camera as well.
Even with the help of a spotter who has eyes on your aircraft, a downed model can be difficult to locate. Being able to play back the final seconds of a flight from the aircraft's perspective can reveal vital clues to help find the missing model. Another purpose for recording your video stream is to troubleshoot or tweak the performance of a model. This is especially true if you use an On-Screen Display (OSD) to provide a data overlay on the video downlink. This allows you to have a dashboard that correlates performance data with each moment of the flight. Since it's recorded, you can analyze the data after the flight - without the real-time overhead of piloting.
A third rationale for recording your video stream is that it may be your only image source. There are a handful of ultra-small and lightweight FPV platforms that just don't have the capacity to carry a dedicated hi-def camera. The Blade 200QX, and FPV Nano QX are just two examples among many. Whatever these set-ups may lack in video quality, they more than make up for with versatility. It's perhaps the only way to record an FPV flight that takes place indoors!