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60p -> 60i. Forgot how I did it.
Hmm. A year ago, when I was nearing a self-imposed deadline, I managed to work out how I can take a fully 59.94fps 1920x1080p AE composition and rework it into a 29.97fps 1920x1080i (upper field first of course) composition, for export to Encore (and/or encode as Bluray-compatible H.264).
But it seems that I can’t wrap my head around it on only two hours of sleep. I do recall that the major deciding factor was knowledge of what AE tries to do with the composition, or how it reinterprets it within a 60i composition. Specifically, I recall doing a couple dozen tests where no matter what I tried, AE kept giving me a 60i video that simply dropped every other frame of the 60p original (rather than converting each frame into alternating fields), which naturally resulted in the halving of my framerate. That was frustrating. I did figure out how to get it to work, at the time.
But now I don’t even know where to begin. I don’t even remember if I literally reconstructed the whole thing by reducing each frame’s vertical resolution by 50%. Well.. I’d probably remember if I had to do something like that. So that’s probably not what it was.
To recap: I got a 59.94p composition and want to turn it into a 59.94i composition. It’s about two hours long.
Help appreciated. Thanks! 🙂
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2 Replies
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Yeah. That’s sort of how I remember encoding the project a year ago, when I finally determined that Encore was never going to successfully encode the AE project, and let AE do its one-pass job.
However, in this case, what I need to end up with is a composition (not a render) which is 60i, so I can then import it into Encore, or Media Encoder, or Premiere Pro, as they are all supposedly capable of importing AE compositions. (Knock on wood.)
It’s probably something equally simple. Whatever step I’m missing which will allow me to interpret the “footage” of a new composition as 60i, while preserving each pair of frames as separate fields.
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This one is still stumping me. If this was Avisynth, I could get it done in two or three lines of text. But I do not have that option. AE’s render queue does me no good specifically because it can still only do single-pass H.264 encodes.
It looks more and more like I’m going to have to get more HDDs and render this off as raw, because if I’m not getting a “generic error”, I’m getting an unknown error from Dynamic Link. The whole thing is just so gosh darned buggy (I have never gotten a cross-application function to work!) that I marvel that people largely consider it usable.
Meanwhile, I’ll still be hunting around for a way to get this done. A “reinterlacer”, if you will.
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