here are some information regarding the video recording issues.
Once you stop a video recording located on a USB stick, AR.Drone 2.0 will beging processing these data to create and edit a MP4 file stored on the USB stick. In order to do so, AR.Drone 2.0 requires 3 things:
-To be kept powered on as long as required. The longer the recording, the bigger the file to be created and, of course, the more time AR.Drone 2.0 requires to create this final MP4 file. When recording on USB, most videos require a few seconds. Biggest videos (a full flight recording for an entire battery lifetime), could require a full minute.
-To have enough available space on the USB stick as the temp file's size. So, if your temporary file "weight" 1Gb, you need to have a USB stick with at least 2 Gb (1 Gb for the temporary file and 1Gb for final MP4 file).
-To have the recording action stopped from AR.Freeflight's 2.0 interface. If USB stick in removed from the AR.Drone 2.0 or the drone is powered down, the processing will not be launched until USB is reconnected.
If USB stick is unplugged while the video file is being processed, action will be canceled and the USB stick will only contain "mp4.tmpvid" files unreadable files. You should still be able to retrieve these files though. To do so, do not touch or rename these temporary files, power on the AR.Drone 2.0 and plug the USB stick: video files will be processed anew.
We are currently working in reenforcing and improving the video process.