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1080i: 29.97 versus 59.94
I don’t completely understand the 1080i 29.97 versus 59.94.
I understand that 29.97 is the frame rate, but is 59.94 the field rate at 1080i, and do both numbers represent the same thing?
The HDcam tapes I get to work with are shot at 1080i/59.94. But there’s no Kona capture pre-set or sequence pre-set for 1080i/59.54. Is the 59.94 the same as 1080i/29.97? I captured my video using the Kona pre-set of 1080i/29.97 and the video captures fine, and plays back nicely. Just for kicks, I tried a capture by modifiying the capture setting “FPS” menu to 59.94. The system would not capture video with this (59.94) setup.
Can anyone explain the correct Kona 2 settings for HDcam shot at 1080i/59.94. What I have seems to work, but I don’t fully understand it.
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2 Replies
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Scott,
This is as far as I understand it. 59.94 is the refresh rate for the “fields per second” this means that at 29.97 there are 59.94 fields in that second. I do not think that the KONA2 captures individual flieds so the preset would be designed to capture a frame rate of 29.97 frames per second. 59.94 tells you that the footage was captured as an interlaced picture with 59.94 fields per second and a frame rate of 29.97 fps.
it makes sense that a 59.94 capture preset would not work as I do not think any deck out there actually splits fields.
David
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when you capture (for example) from an AJ-HD1200A HD VTR, the preset is
720p 59.94.bob Zelin
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