What’s happened?
updated 12 years, 5 months ago 4 Members · 15
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Is that acknowledged in the manual? Seems like a big deal and I can’t remember ever hearing that before regarding the hardware down-converts.
[Mike Zimbard] ” Jeremy can you explain why? I’m trying to understand why a frame would be lost. Aren’t you just going from 1920×1080 @25 fps to 768×576 @25fps”
Mike the frame is not lost, but delayed since it takes specific amount of time to pass the signal thru the chips doing the conversions (be they up or down – NTSC or PAL)
Kona Conversions are delayed by 1 frame for continuity (all decks and encoders that handle this type of conversions maintain at least this amount of delay– some like Terenex are more, with as much as 3-10 frames depending on the image processing required).
This delay is because that signal has to pass thru the additional circuitry needed for the conversions- One frame is necessary since some formats have fields and some frames it had to be tied to the shortest period of time that covers all formats.
make since?
gary adcock
Studio37
HD & Film Consultation
Post and Production WorkflowsYes Gary – makes perfect sense. Thanks very much. Is it easiest to account for this delay by just marking in 1 frame earlier on your SD VTR so that your record in-point is where you want it?
[Mike Zimbard] “Thanks very much. Is it easiest to account for this delay by just marking in 1 frame earlier on your SD VTR so that your record in-point is where you want it?”
For FCP yes.
gary adcock
Studio37
HD & Film Consultation
Post and Production Workflows
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