"Fixed" silent crashes and slow ass video

Changed video sample file to a smaller .3gp video, giving me bad hit
rate on face detections, but better speed (more than 2 FPS, which was
the framerate with the large MPEG). SIlent crashes are still happening,
just that the video can now complete 11 passes instead of 2, I suspect
that the crashes are happening in native code because of non disposing
somewhere.