24F vs 24P

[Daniel E]

Well that depends on what you call the same. If you are talking about 24 Frame recording per second on the XH-A1, XH-G1 and XL-H1 compared to 24 frames per second motion on say an HDCAM camera in 24P mode then you could say it is the same thing (if not the same quality). If you are comparing the XH-A1 24F HDV to the HV20 24P mode HDV or the Sony 24P HDV mode they are not exactly the same thing since the signal is recorded to tape differently by the different cameras and the editing systems deal with it differently. 24F HDV is recorded to tape as as 24 Frames HDV while the HV20 24P records to tape as 24 frames in a 60i stream. (similar to the way DV works). This means the signals look different to the edit system when coming in over firewire. If you end up editing in 24 frames you might see a difference in artifacts or you might not. Theoretically you might see the difference on motion which stretches the capabilities of HDV Bandwidth in 24P over 60i but doesn’t overwhelm 24F HDV. The 24P over 60i has to record the pulldown in the same bandwidth as the 24F only reocrds the frames. Also the name 24F was used since the chips are interlace and the Frame is put together in the camera while the 24P chip is progressive and Canon didn’t want to pay for the right to call it 24P until recently

Daniel Epstein
Gold Teleproductions, Inc
New York, NY
http://www.goldtele.com

[Ryan Santos]

Thanks. But does the 24F record full frames like the Panasonic DVX100B’s 24P?

[Daniel E]

The Panasonic DVX-100B 24P is recorded in DV as 24P in 60i. The XH-A1 records 24F in 60i in DV the same way. Both need to have the pull down removed to have true 24 frames. The DVX chips are progressive and the XH-A1 chips are interlaced but the frames are integrated by the processor so in DV they are essentially the same. The advantage of the XHA1 is it can record HDV which the DVX 100B can’t and that is where things get more complex.

Daniel Epstein
Gold Teleproductions, Inc
New York, NY
http://www.goldtele.com

[Chris Carr]

When one imports the footage from the XH-A1 using FCPs HDV 1080p24 codec, do you still need to remove the pulldown using Cinema Tools? My friend is currently doing this, and he believes that the pulldown has been removed in the process in that the footage shows up in a 23.98 fps timeline.

Thanks

[Eljay]

Does 24P and 24F mean 24.000 Frames-per-second, or 23.976 Frames-per-second (24/1.001, exact)?

Does 60i mean 60.000 Hz, or 59.94 Hz (60/1.001, exact)?