mixing formats 1080psf 23.976 and 1080 50i

[Gary Adcock]

[keicol] “I had planned on using the Y Pb Pr into an AJA analog HD to HD SDI converter which I bought to get the footage into my F500 using the 50i frame rate and then reset the F500 to playback as a 23.98 tape. I haven’t tried it yet and have heard that I needed the 3:2 pulldown option board which I don’t have installed.”

Keith -apples software does not do a good 60i to 24p (PSF in your case)conversion very well, the Standards Converter from Graeme Nattress does do a fine job or use some thing such as a teranex or alchemist to properly handle the interlace to progressive frames.

as for the frame rate conversion -doing it in camera is not the best solution, as the audio will be modulated incorrectly. FCP and CT both have a 25-24fps slip function — I would recommend capture at 25fps stripping off the audio and conforming the shot after capture and not before. That way you get the correct audio off the tape before converting.

gary adcock

Studio37
HD and Film Consultation

[Keicol]

Gary, That camera is simply for insert action shots M.O.S. If it had a 24p function I would use it however that Z1 HDV camera does not, I’m not doing any in camera conversions, I was planning on shooting 1080 50i on the Z1, transfering that to an HDcam machine at 50i, taking that 50i HDcam tape and with the F500 play it back at 23.98 which the F500 deck would combine the interlaced filds into frames (with temporal distortion) and then play those frames back at a slower speed, 23.98. No frame blending, no interframes, simple interlace into progressive and a speed change. No audio etc. I though that maybe there might be a way to achieve the same effect in the computer?

Keith

[Gary Adcock]

[keicol] ” I though that maybe there might be a way to achieve the same effect in the computer? “

FCP has a Conform 25 to 24 in the tools menu — it does this task better than the deck transcode will

gary adcock

Studio37
HD and Film Consultation

[Keicol]

[gary adcock]”FCP has a Conform 25 to 24 in the tools menu — it does this task better than the deck transcode will

What method of conversion does this method use? Do I set up a 1080 50i project to import the HDV footage into then use the tools menu to output the new clip then import that new clip into my 23.98 1080 project?

thx, keith collea

[Gary Adcock]

[keicol] “What method of conversion does this method use? Do I set up a 1080 50i project to import the HDV footage into then use the tools menu to output the new clip then import that new clip into my 23.98 1080 project?”

all conversion tools in FCP / CT require you to capture then convert.

gary adcock

Studio37
HD and Film Consultation

[Keicol]

I meant, what goes on during the conversion, are we preserving the original information and combining the fields into frames and slowing the frame rate playback without having to invent any new information.