24pa ntsc workflow

[Billy Morocco]

Tom,

Thanks for continuing with me on this. I’ll stick with the issue, which was shot with the DVX100a set to 24pA.
I have the easy set-up that includes the Advanced Pulldown.
Sequence settings include Advanced Pulldown.

I captured with Adv Pulldown Removal.

The export to QT stutter and flicker even on locked-down shots. Even just someone talking.

I don’t have my scratch disk here or I would try it again. But I do remember that the info window for QT showed Framerate: 24, and sometimes 24.xx.

I don’t know if that helps. I will do another export when I get home tonight and perhaps investigate further.

Bill

[Tom Brooks]

Can’t really tell without seeing it, Bill. I don’t see a glaring problem with your method. Maybe you could post a few seconds of the offending video.

[Billy Morocco]

Tom,

Thanks so much, again.

I just did another export to QT, and… it plays fine. Must’ve been an overheated graphics-card glitch, maybe?

The QT info does fluctuate between 23 and 24.61 – I did not recall seeing that with 24pN footage.

Also… under Sequence-> Settings -> Advanced I see that the export is set to 23.976 (fine) but it is also set to Interlaced… Should that be changed when doing an export with this footage?

Anyway thanks again. I was doing this for a 48hr contest and was literally rendering and messing with Compressor in the car. Thanks to these forums, I knew I had followed the procedure for Capture… and my problems didn’t fit any of the problems I was perceiving.

Thanks to you, I am confident, again, that QT can play 24frames/ps.

Now just waiting for that 64 bit upgrade.

[Tom Brooks]

Bill,
No, you don’t need to change that setting where it says interlaced. I’m not sure of the explanation for that, but it doesn’t apply, as long as the sequence settings are 23.98 and Field Dominance is None. I don’t mess with those internal settings in the Sequence Settings/ Compressor/Advanced dialog.

The frame rate of 23.976 is the exact number it should be. When FCP mentions 23.98, it’s merely shorthand for 23.976.

Quicktime Player should report 23.98 under “FPS,” but will vary some under “Playing FPS.” The player is not bound to maintain a rigid frame rate like Final Cut does to maintain format specs.

Does your exported QT movie appear to be the correct aspect on playback? If not, hit Command-J and change Conform Aperture to Clean or Production.
– Tom

[Billy Morocco]

Tom,

Thanks. The QT Export shows as 720×480. That Conform box is unchecked.

When I check Clean it thins to 640×480

And production thins to 655×480. I have to admit, I wasn’t aware of those controls.

As I said. the movie looks okay. I am attaching a clip of the credits – where I do notice some stuttering (but I am not on a Broadcast Monitor). Is this within the normal parameters?

Note: I’m not sure this will be at all indicative. I will check on a good external display when in the office.

Let me describe what I saw on Sunday:

In the QT export I was seeing large, full screen jitters, like a quick freeze and then the player caught up to itself. Like shuttling through a timeline or

almost like the BLINK filter… but the audio was not stuttering. This is what made me think it was some frame rate issue.