Yes, it is 24p.
Got that out of the way. It seems that there have been a bunch of forum threads attacking Canon, saying that this awesome little camera doesn't really shoot 24p. Not that misinformation is unusual for the internet, however, these posts often quote me or CineForm as backing this position. Neither myself nor CineForm support these posts or claims.
The problem arose when I did state that there can be a subtle issue for chroma keying when using any 4:2:0 24p signal encoded into 60i. Some users took that and ran with it. I had seen some of this in customer footage, nothing I have shot. I probably wouldn't have mentioned anything other that it is a another selling point to using the HDMI output from these new cameras (which is damn cool), and I'm a video geek. Since then I'm not even sure this issue exists outside of MPEG compression artifacts, as some more recent burrowed footage looks great. I have so little HV20 footage to work from that we shoot ourselves -- Canon, we need a camera longer than a few days -- I want one to take home :).
Basically, the 24p signal is good, and the CineForm pulldown from 1080i60 HDV tape works perfectly. That is my position.
Here is some 24P extracted footage from a friend's HV20 as she was documenting some behind the scenes footage for our 48 Hour Film Project shoot -- the camera pictured is a Silicon Imaging 2K. We intercut the HV20 footage into the credits of this movie and presented it at 1080p24 on a Sony 4K projector. The linked clip is a 110MB 1440x1080 CineForm AVI, so if you need a CineForm decoder for your PC (Mac version coming), you can download one for free from CineForm.com.
P.S. Other HV20 misinformation : when recording the Canon HV20 to tape, the image is 1440x1080, that is the HDV standard used. It is not 1920x1080, you only get that out of the HDMI port, and even then the image is likely upsized from an internal 1440x1080 image (which is still very nice.) The 1920x1080 native image is only available in the still camera mode.
Thursday, July 26, 2007
Yes, it is 24p.