Are my clips Progressive Scan with No Fields OR Lower Field First?

Forum|Forum|6 years ago
September 15, 2019
3 replies
2492 views

Interesting situation for you today.

In wanting to confirm my clips specs (so I have the correct sequence settings)

I simly dragged a clip onto the little folder and it would auto create the sequence with settings that matched my clip.

When I did that, it showed me this: (btw, the camer is MiniDV, DVX100a 24p advanced, 4:3 very old school)

And I notice that the Fields are blanked out, indicating No Fields (Progressive Scan)

All good. But.....

The other way to confirm my clip's specs,

I manually created a New Sequence and selected any random preset like HDCAM 30 frames...(anything but 24p)

Then, when I dropped in my clip and clicked "Change Sequence to Match Clip"

I got this:

Now Premiere is telling me, my clips need to be Lower Field First.

My main concern is, should I maintain this setting of Lower Fields First?

From here I want to burn the DV files on a Bluray disc. Well Lower Fields First screw that up?

I did notice one thing, when use the "Lower Fields First" I exported the DV footage to mpeg2 dvd, and instead of 90 seconds for 1 min sequence, it exported it in 5 SECONDS!!!!

And without using preivews.

So how could PPRO be telling me 2 different things for the same clips?

Thanks for your advice. 🙂

Letty

Error or problem

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M

Meg The Dog

Inspiring

Doing this from (distant) memory, but, if I recall correctly:

The Panasonic DVX 100a recorded 24p on to the tape as 1080i - it added, in camera, pull down frames to make the conversion - the same way a 1080i tv station broadcasts a 24 fps film.

When you are in the DV 24p mode in Premiere, Premiere automatically removes the pull down frames that were added to output a true 23.976 file which is what you want if you want to create a true 24p file.

When you created the sequence the other way, for some reason Premiere ignored the special nature of DV24P files, and saw the files as being 1080i lower field (which is technically what they are) and so created the Sequence to match, which is what you want if you don't care if the file is true 24P - you just want it to look that way.

This also explains why the Sequence that is 1080i exports quicker - there is less conversion involved the removing the pull down from the DV 24P file.

Haven't worked with these types of files for many years, so this may not be correct.

MtD

L

Letty2019Author

Legend

Thanks, I looked up 24p and the p stands for progressive. So I'm assuming the footage is all progressive? The camera guy said it was all shot in 24p "film like" setting. The weird thing is when I see the specs of a raw clip, it reads it as 29.97 (in VLC specs) When I import that same clip into PPro, it says 24.976. And when I export from Media Encoder, and re open that new export in VLC, it says 23.976 ??? WTF?? LOL What happened? I like that it ends up 23.976, but why the different readings?