Chenzo, I tried this loop method of playack but also got the no method for 'bang' error and it no longer renders the film at the gemwin framerate of 25 fps at all except for the first frame. The loop method of play is particularly important to me as I would eventually like to use it to trigger sound at certain frames. It would be good to check how much the sound and image go in sync and I will try this out with test footage. If you could post your patch up it would give me a fantastic headstart.
My misfiring non-playing patch is :
here

my email is:
ian@edenserpent.com

Meanwhile as an obvious newbie I shall press on. The crunch will come if I can string high-res clips together seamlesssly and keep it in sync.