It doesn’t matter what settings I use, the result is the same. Whether I render out lossless, Sorenson or even back to h.264. The RAM preview plays at half the frame rate and rendered files do too. If I step through the timeline it only gives me every other frame.
The footage interpretation is correct and I’ve triple checked if there’s anything untoward in the render and output settings – I’m using exactly the same settings I’ve used for every job I do.
I’m baffled. The clips still play fine straight from QuickTime. If I pull in another format clip and render out with the same settings there’s no problem.