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Re: Canon XL-H1s - digging in to the minutia...

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Harry Bromley-DavenportRe: Canon XL-H1s - digging in to the minutia...
by on Oct 21, 2010 at 12:17:44 am

I see you never got response to your question.

Here is some information which I quote from a review of the camera on Millimeter Magasine:

At any rate, what comes out of the HD-SDI spigot is always uncompressed 1080/60i. Newly minted synthetic progressive frames must therefore be segmented into halves in order to fit the 60i cadence. For instance in 30PsF (progressive segmented frames/second), a progressive frame's odd lines are first output, then even lines, amounting to 60 half-frames per second, all of which are reassembled into intact progressive scans upon playback. This introduces the unique irony that 30F, which began life interlaced at 60i, is output as 30PsF at 60i.

24F comes out the HD-SDI spigot as 24PsF, with 2:3 pulldown added to pad 48 half-frames into a total of 60 segments. Downstream devices like NLEs that recognize segmented progressive frames and 24p repeat flags will readily ingest Canon's PsF stream and restore either 30F or 24F “progressive” frames upon playback.

Best

Harry



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