Lagging video from blackmagic unless i disable beam sync
I'm getting a PAL signal via a blackmagic grabber. When i display that image on the projector (60Hz) the video is lagging in an annoying way, is simply not smooth. The framerate of millumin is around 34fps weirdly enough. If i then disable beam sync on the mac (in quartz debug), then the framerate jumps up to 60fps, and the video stops lagging. Its super smooth. But now i get the vertical sync lines in the image of course.
Are there any tricks to get better performance without disabling beam sync?