Canon HV 20 24p: Pulldown in FCP but not in QT?

[Jeremy Garchow]

IF you don’t have your QT window set to 100%, QT won’t show you all of the information.

Check this for reference if you want to remove pulldown.

https://support.apple.com/kb/HT2410

[Joe Hedge]

Yes I already took the pulldown out as per apple’s instructions – that’s not what I’m talking about. When I open a clip I shot in 24p mode with the HV20 in QT, that I have not yet used Compressor to remove the pulldown/duplicate frames from, there is no pulldown and no duplicate frames. It plays at a continuous 30fps with no dupe frames. When I open THAT EXACT SAME CLIP in the viewer in FCP 6, it plays at 30fps WITH the dupe frames and pulldown. Why???

[Jeremy Garchow]

Qt doesn’t show interlacing most of the time. Like I said, if the QT window is not at 100% (1920×1080), it isn’t showing you the full quality. If you open the clip in Cinema Tools, you will be able to see interlacing. You should also have the high quality playback option enabled in your qt prefs.

If all of that is done, step through frame by frame to check for pulldown and double check your frame rate in QT.

Also, are you trying to do something in particular, or are you just making an observation?

[Joe Hedge]

Not talking about interlacing – yes the original camera clips it are interlaced. And I am stepping through frame by frame in QT – there are 30 frames per second but no dupe frames or pulldown when I open them in QT. But the exact same clips in the viewer (not the canvas) in FCP shows duplicate frames (pulldown). I know it’s hard to wrap your head around unless you actually see it. Just wondering if anyone can explain it. Tomorrow I’m auditing Larry Jordan’s advanced FCP class here in Burbank and I will bring my laptop and the clips and see what he says and report back, thanks, Joe

[Jeremy Garchow]

[joe hedge] “Not talking about interlacing”

Pulldown is interlaced, so we might be talking about two different things here. If you are seeing actual dupe frame, something is wrong.

Jeremy

[Tom Wolsky]

Why are you opening this clip in FCP without removing the pulldown? Do this in Compressor or Cinema Tools before importing the files.

The reason it probably happens is because Canon does not seem to interpret pulldown the same way FCP does. https://support.apple.com/kb/HT2410

All the best,

Tom

Class on Demand DVDs “Complete Training for FCP6,” “Basic Training for FCS2” and “Final Cut Express Made Easy”
Author: “Final Cut Pro 5 Editing Essentials” and “Final Cut Express 3.5 HD Editing Workshop”

[Joe Hedge]

“Why are you opening this clip in FCP without removing the pulldown? Do this in Compressor or Cinema Tools before importing the files.”

I already created different clips using Compressor that removed the pulldown – that’s not what I’m talking about. I’m talking about the original camera clips that play back at 30 fps with no dupe frames in the QT player, yet when you open them in the FCP viewer, they play back at 24fps with dupe frames and pulldown. Larry says it’s because FCP is not showing the fields, whereas QT is.

[Louis Zwiebel]

Hi, Jeremy and Tom
I’ve tested running my HV20 PF24 footage through Compressor, and see that the files are 4 to 5 times larger when finished. I saw on other sites that this is normal.
But then I read somewhere (I can’t recall where) that someone, to save disk space, did his editing first, and THEN ran the completed footage through Compressor, after editing in FCP.
Is this wise?
I have 22 hours of footage. If this would work, it would obviously save me a lot of disk space and time. But I of course don’t want to the above and discover afterward that I screwed it all up.
Any suggestions would be great.
I’m doing this all for the first time.
Best,
Louis

[Louis Zwiebel]

I found the info I referred to, regarding doing the pulldown removal After editing:

“…If you want to remove pulldown after your done editing, JSE Deinterlacer is truly wonderful and a breeze to use. I recently edited a piece that was shot on an HV20, where the final output was 24p. I just saved the pulldown removal for the final step before delivery to prevent having to have duplicates of all the footage taking up space….”

from this site:
https://forums.macrumors.com/archive/index.php/t-358342.html

Thanks.

I hope I’m in the right forum thread,

Louis

[Louis Zwiebel]

Hi, again

I found this answer to someone else’s similar question, here:
https://rebelsguide.com/forum/viewtopic.php?p=4349&sid=e2c1b431b1699ce48c3b758edf9e4b3a

“My suggestion is to create a 60i project in FCP and capture the footage.
Then export all the footage to compressor and create 24p footage in ProRes (do not scale)
Then create a new 24p project in FCP do do the actual editing.

This is not entirely elegant, but editing in 24p footage in a 60i project is not that safe.
You can actually make a cut halfway through a frame, change the cadence of the pulldown.
When your edit is finished, you might find that an automated process might not be able to extract a 24p cleanly.

So a better workflow would be.
Capture -> ReverseTelecine -> Edit”

— by: Carniphage

This is very helpful, but I have 250 gigs of footage now, many files of which are 5-12 gigs large. IF everything will quadruple, it may be unmanageable, unless I chop it up I suppose.

Do you recommend?

Thanks again,

Louis