24p in After Effects

[Steve Roberts]

24P, straight out of a video camera, has had pulldown added so it can play on videotape.

If I understand the Duck correctly (sorry Wes, haven’t bought it yet), the imported sequence uses the original captured clips. Unless the captured clips have had pulldown removed manually, they still have pulldown.

When you interpret the clips, can you try an advanced pulldown (24pA) scheme?

Steve

[Tito Da costa]

Thank you for taking the time to help me.

The DP assures me he shot this at 24p not 24p advanced.

I opened the original clips in QuickTime and they are in Balckmagic DV 24 fps.

I can’t see any fields whatsoever in QuickTime nor in FCP, but when in AE I can clearly see interlaced frames.

I’ve tried removing both normal 3:2 Pulldown and 24Pa Pulldown in the interpret footage window but the fields don’t go away… and I get a warning that it will give me an effective 19.200 fps.

I’m also using Magic Bullet to deartifact the footage and even with the deinterlace option on, some of the clips remain unaffected still displaying interlaced frames… but I believe I shouldn’t be using deinterlacing on progressive clips since it affects the progressive frames as well.

I double checked one of this clips on QuickTime and it didn’t display any fields at all.

Now the weirdest thing is that if I open the clip from AE’s browser and playback on it’s own window I can’t see any fields either, but once in my comp the fields are there, even if I double clip the clip and watch it in its own window.

I’m guessing the problem is in my timeline settings…

Preset: Custom
With: 720
Height: 480
Pixel Aspect Ratio: D1/DV NTSC Widescreen (1.2)
Frame Rate: 23.976

I’m really lost here…

Thanx

T

[Tito Da costa]

Thank you for taking the time to help me.

The DP assures me he shot this at 24p not 24p advanced.

I opened the original clips in QuickTime and they are in Balckmagic DV 24 fps.

I can’t see any fields whatsoever in QuickTime nor in FCP, but when in AE I can clearly see interlaced frames.

I’ve tried removing both normal 3:2 Pulldown and 24Pa Pulldown in the interpret footage window but the fields don’t go away… and I get a warning that it will give me an effective 19.200 fps.

I’m also using Magic Bullet to deartifact the footage and even with the deinterlace option on, some of the clips remain unaffected still displaying interlaced frames… but I believe I shouldn’t be using deinterlacing on progressive clips since it affects the progressive frames as well.

I double checked one of this clips on QuickTime and it didn’t display any fields at all.

Now the weirdest thing is that if I open the clip from AE’s browser and playback on it’s own window I can’t see any fields either, but once in my comp the fields are there, even if I double clip the clip and watch it in its own window.

I’m guessing the problem is in my timeline settings…

Preset: Custom
With: 720
Height: 480
Pixel Aspect Ratio: D1/DV NTSC Widescreen (1.2)
Frame Rate: 23.976

I’m really lost here…

Thanx

T

[Steve Roberts]

Try this:

1. Interpret the clip with field separation set to “lower”.
2. Next, opt-double-click (alt-double-click) on the imported clip in the project window.
3. Next, step through the clip using the PageDn key on the numeric keypad.

Now, tell us what you see each time you hit the PageDn key:
– does the action move forward each time you hit the key? If not, do you see a pattern?
– do you see interlacing? On every frame?

Did anyone try to remove pulldown before you were given the clip? Maybe they did it wrong. You need to know the history of the clips from camera to you.

Let us know …
Steve

[Tito Da costa]

Once again thank you so much for your time.

I followed your instructions and the fields are gone but the frames repeat 3 times, moves 1, repeats 1, then moves 2, repeats 1, moves 1 and repeats 3 times again… (if I can’t make it any more confusing)

Unfortunately I don’t know much about what the clips been through before they got to me. The director edited this with a buddy of his and isn’t quite sure how they were captured or dealt with… If that wasn’t enough, I’m getting a media managed copy form FCP to work with…

If it’s of any help, I interpreted the footage with “upper” in the field separation and the clip goes all wacky moving frames back and forward.

Thanx

T

[Tito Da costa]

Thak you so much for your help!-)

T

[Mike Most — account bouncing, bad address]

It sounds to me like you’re creating the problem. If the clips you have are already in 24 frame format (you state that they are), you shouldn’t be doing any pulldown removal, because they don’t have pulldown. Just import them and drop them directly into a 24 frame comp. Even better, create the comp directly from the source footage (drop it on the “create a new composition” button at the bottom of the Project window) and the correct frame rate will already be applied, as well as the correct dimensions.

[Tito Da costa]

That’s all good and I did just that, but the clips display fields in AE… so there’s clearly something wrong about how they were treated and unfortunately I haven’t been able to get any information about the rout the footage had before it got ot my hands.

Thanx for you interest.

T