My DV sp, 24fps Experience
Finished Product: Community musical theatre performance on DVD (29.98).
Attempting to multicam edit footage that was shot with the Panasonic AJ-SDX900P and the Sony V1U. Both cams shot in DV (standard play), 16:9, 24p (2:3 pulldown).
Source footage:
Panasonic AJ-SDX900P; DVCPRO25; 24p; 16×9
Sony V1U; DV sp; 24p; 16×9
JVC-HD100; DV sp; 24p; 16×9 (not officially part of this project)
Sony HVR-MRC1 (flash disk); DV sp; 24p; 16×9, (not officially part of this project)
Computer Specs:
Mac Mini
Mac OS X version 10.4.11
1.42 Ghz PowerPC G4 Processor
1 GB DDR SDRAM of Memory
Final Cut Pro Studio ver. 5.0.4
Quicktime Pro ver. 7.3.1
How each camera is feeding the computer the footage
Panasonic AJ-SDX900P: BNC Video out from the camera to BNC CV in to a Blue Flame Pro LTM 5500 (manufactured by Laird). This is an uncontrollable device. Therefore, Final Cut Pro is unable to read the timecode on the original source footage.
Sony V1U & JVC-HD100: The DV tape stock from the V1U has been inserted in to a Canon Elura 65 and connected to my Mac Mini via Firewire. I have also inserted the footage into a new Sony Z7U with the same results.
Problem
While multicam editing the 24fps footage I had noticed that some frames would freeze (duplicated) on one camera as the other camera when on to the next frame. As I continued through the footage I noticed the opposing camera footage was also doing the same thing.
Questions to be answered (outcome)
Is the freeze frame/duplicated frame to be expected when capturing in 480i/24fps?
Is the freeze frame/duplicated frame what gives that 24 fps look?
Is the same true when shooting in HD 24p?
Do I need to deinterlace the 24fps footage?
Is it still a good/bad idea to multicam 24fps?
How can I hook up an broadcast calibrated monitor to my mac mini so I can see more then just a preview of the footage I’m editing?
Have I gone completely mad?!?!?
Will this blog post become my first book?
Source Footage (as viewed with a Sony broadcast 19 inch monitor (8.11.08)
V1U - As I toggle frame by frame I count 1, 2, 3, 4, freeze, 1, 2, 3, 4, freeze.
DVCPRO50 - Because the DVCPRO is an uncontrollable device and does not have a slow motion playback mode I am unable to test for the freeze frames.
This test proves that I’m not crazy. I even had my roommate watch the monitor with me and he agreed that there are defiantly frozen/duplicated frames on the V1U source footage.
CAPTURE ATTEMPT SETTINGS AND RESULTS
23.98 PULLDOWN KEPT:
DVCPRO50, no physically skipped frames but frames noticeably freezing in multicam view (when I go to single view on the same frame you can see Venetian Blind Effect on the performers moving on stage)
V1U, physically skips frames (as you shuttle one frame at a time numbers are missing)
23.98 PULLDOWN REMOVED:
DVCPRO50, same as above.
V1U, same as above and in addition the audio did not sync up
Using the Apple Intermediate codec:
V1U, frames skipped 5, 15 & 25 in a 23.98 frame rate. Still seeing freeze frames. 1, 2, 3, F, 1, 2, 3, F
Using the Prores 422 codec:
V1U, No skipped frames. Time code counting up to 29 frames in 23.98. Still seeing freeze frames. 1, 2, 3, F, 1, 2, 3, F
24fps PULLDOWN KEPT:
DVCPRO50, frames noticeably freezing in multicam view (when I go to single view on the same frame you can see interlaced fields on the performers moving on stage)
V1U, audio does not sync
24fps PULLDOWN REMOVED:
*DVCPRO, nothing seems to be freezing as like above (also not freezing in multicam view) not freezing using JES Deinterlacer either
V1U, frames noticeably freezing in multicam view (when I go to single view on the same frame you can see Venetian Blind Effect on the performers moving on stage)
29.98
V1U, As I walk frame by frame you can see the 4th frame freezes
DVCPRO50, As I walk frame by frame you can see the 4th frame freezes
JVC-HD100u, As I walk frame by frame you can see the 4th frame freezes
24fps - flash card to computer direct
Sony HVR-MRC1 (flash disk), Captured as an AVI file and viewed using Quicktime Pro; you see every fourth frame freeze
More information to come in the section
Output on DVD
More information to come in the section
Reference Material:
24p in Final Cut Pro HD and the DVX 100
Steven Mullen and Panasonic AJ-SD930 & DVCPRO50 VTR
Editing the V1’s 24p in Final Cut Pro: A Workaround
How do I capture and edit “24 fps” video in FCP?
What shutter speed in 24P mode for film like look?
adamwilt.com > the DV, DVCAM & DVCPRO Formats
A bit of a rant…
Camcorders: Are there any 1080p camcorders out now?
Production Notes: Call the Guy MAD AS HELL!
Info on Broadcast Studio Monitors:
I own a Mac Mini and I’m not aware of anyway to hook up my Mini other then using the technique in the following link:
Using your DV camera (relaying the video to a monitor via DV camera)
Vocabulary: (may or may not have a direct correlation to the main subject at hand but maybe be useful while exploring the video forums of the internet)
After a conversation with Sony’s telephone tech support, here’s what I have so far:
You can record 24 progressive frames per second (V1U and the Z7U) in standard DV mode and in HDV mode. The Z7U is the only camera that will shoot 24 progressive frames natively in HDV 24p.
In 99.9% of the time you will want to capture 24fps footage at 23.98 in FCP. This allows the footage to be more flexible. (if you would like to use the footage in a 29.98 timeline and other such reasons I can’t quite remember). I guess we are so lazy that we can’t actually say 23.98 when it is 23.98 because it doesn’t roll off the tongue as easily as 24p. Very frustrating indeed.
The freeze frames are a natural occurrence when dealing with 23.98fps in standard DV or HDV (with the exception of the Sony Z7U. This is when the advanced pulldown must be removed in FCP.
According to Sony’s tech support, when the pulldown is removed the footage is already deinterlaced and no further deinterlacing is needed.
Sony tech support also alluded to using specific codecs to use when capturing to remove the pulldown as well (still fuzzy on this one)
Sony tech support also alluded to the differences between 24 and 24A progressive settings. Saying where the pulldown can be removed with one and not the other. (very fuzzy on this one)
Calling sony happened to be the best way to get answers so far. I don’t regret spending the time trying to figure it out myself. As you can see from above I was able to remove the pulldown for the DVCPRO50 but only when captured at 24fps not 23.98.
Second day with Sony tech support:
Today’s Sony tech thought that my little Canon Elura couldn’t understand DV footage captured in 24p. Well, I did as they recommended. I played back the V1U footage on my brand new Z7U (loving it so far) and it played back just the same as the Canon. 1, 2, 3, 4, freeze, 1, 2, 3, 4, freeze. I’m also being mindful of the timecode on the cameras LCD and it is moving frame by frame. I suppose maybe I shouldn’t consider it a freeze frame. Perhaps I should refer to it as a duplicate frame. (8.12.08)
The Ultimate Quagmire:
When I check my work after speaking with Sony tech support, what was explained to me does not seem to be true based upon my previous efforts. I captured in 23.98 with the pulldown removed and I had no luck. I will double check my work and call Sony back again. FUN!
I hope to have this all figured out by the time my head hits the pillow tomorrow night (8.13.08).
The “stuff” that I’m beginning to understand:
As I continue to dig through internet forums, read online articles and speak with video professionals, I’m beginning to understand a few things about this 24p workflow.
When recording in 24p (2:3 pulldown) the duplicated frames are used because the camera is constantly recording 60 fields per second. If you divide 60 by 24 you get 2.5. Since the camera is not capable of half (.5) fields so it alternates between 2 and 3 fields is created (hence the 2:3 pulldown).
24p advanced mode was created so that NLE’s could easily seek out the pulldown and remove it when capturing the video from the source footage. (I have yet to try this mode myself but will soon do so)
Thus 24p (2:3) is preferably to be used when transferring video to film (and vice versa) and 24pa (2:3:3:2) is best to be used when working with digital NLE’s out sourced to DVD. 24pa footage also does not have to be compressed when the pulldown is removed; so the original footage (look/quality) is sustained, unlike 24p (2:3).
Unfortunately for me, the source footage that I am working with is 24p (2:3). And as of (8.12.08) I have yet to capture/compress it correctly. But with this knowledge I think I’ll be able to communicate my issues intelligently with Sony tech support tomorrow morning ;).
We are in this digital war together
I will leave this blog post up for anyone who needs the help. Honestly I don’t know why Sony and other venders wait till after the camera is released to get out information concerning the workflow for their pro products. I have been through the manual and the information I have shared with you thus far is not stated anywhere. When I told Sony tech support I was willing to do the work of getting this stuff written down, they said that they will have information available in the next few months concerning the workflow. Till then Sony should expect plenty of phone calls from those who expect the most out of their (expensive) prosumer cameras.
If this blog post has been helpful to you or if you having any additional information you would like to share please leave a comment. As much as we like to take pride and ownership for our work, filmmakers, we are in this together.

