I just recorded my video but my since Flash auto-selects line-in for me, no audio was actually recorded.
We ran into that problem a lot while trying to optimize the user experience of the VideoView recording application. It turns out end users will ignore lack of audio feedback and some will even continue recording when the interface shows nothing but a black screen in case the wrong camera is selected.
We're building a semi-automated selection interface for it now using entropy estimations to select the best camera and microphone, but since you're probably optimizing more for a quick start I'd suggest doing a quality analysis (like PExQ for example) after the fact so you can at least give an early warning that there may have been an issue recording the video.
We ran into that problem a lot while trying to optimize the user experience of the VideoView recording application. It turns out end users will ignore lack of audio feedback and some will even continue recording when the interface shows nothing but a black screen in case the wrong camera is selected.
We're building a semi-automated selection interface for it now using entropy estimations to select the best camera and microphone, but since you're probably optimizing more for a quick start I'd suggest doing a quality analysis (like PExQ for example) after the fact so you can at least give an early warning that there may have been an issue recording the video.