Be aware that on iOS (I don't use Android, so could not check the Android version), the ASIAIR app, in addition to adding the nuisance watermark at the bottom left of the frames, saves the MP4 video as a low resolution image; it is best to use the AVI files.
At least on iOS, ASIAIR chooses to record the MP4 video from a color camera as a YUV420P stream. I.e., the chroma channels are at half resolution, only the luma (Y) channel is encoded at full resolution. This is on top of on-the-fly deBayering by the ASIAIR. Unless you are heavily oversampled, this will affect the image that you get from a drizzled stack.
The AVI file looks OK, and the video from a color camera is recorded as an indexed grayscale file (where the index, sometimes called palette, is completely linear) . The encoded AVI file is a raw Bayered monochrome file where all the color components can be extracted for drizzling at full resolution.
Additionally, every AVI frame is encoded as a Key frame. Most MP4 frames are not Key, but this is probably not a problem for stacking programs that can handle it -- they just need to reconstruct the frames from the delta frames.
Chen
