jase wrote:Anyway, after some errors, no help from anyone and general head scratching I was finally able to cobble together a clip - clearly got the sync a bit out and need to use a four digit gauge for speed next time...*MEH* good enough...
looks great for a "proof of concept" - I don't really use Windows but I'll certainly download it and have a play.
Sync is a tricky for multiple data sources... there are some cheap and cheerful film and video industry methods for that - think clapper boards etc... but when they get serious they also use a ton of complicated timing gear (and recorders that embed "standard" timecodes etc)
Unfortunately for us (rocketry) a few frame times is a long time - eg: two frames at 25fps is 80ms - even my little guys are off the rod @ 200ms
For my own plans I had been thinking about putting a current sensor in the base of the rocket to pick up the igniter power (as a "key frame" event) - but you still have to sync external cameras. It would also be nice to not have to retrofit stuff to a rocket.
I have a Sony action cam that buries the GPS in the video file; I think the
GoPro does that too (which is what Dashware seems to be chasing)
If you have a GPS you have a good timebase to work with.
I think it would not be too hard to knock up something to draw gauges against a "green screen" so that you could overlay them on video (even basic video packages can do that these days) - I guess the question is what gauges are for rocketry?
roll rate? xyz acceleration? AoA? altitude certainly, velocity certainly. ground track in a way that doesn't eat half the video with a map...
