projector wont deinterlace

[Rafael Amador]

[Bret Williams] “Oh, wait… EDITED 24p in a 29.97i sequence at LOWER first? Assuming it’s anything except a DV sequence, then it should be UPPER first. “
No if we are talking about SD.
Yes if is HD.

IMO the issue is for editing Progressive stuff as Interlaced.
Most of all if the original footage is 420.
When the footage is 420, the Chroma pattern is different for Progressive and Interlaced stuff.
rafael

[Simon Modery]

Is the photo you posted turned by 90 degrees? Because if the lines really go vertical it can’t be a de-interlacing issue (field lines are always horizontal).

Head of Postproduction
Motherlode

http://www.simonmodery.com

[Stu Gilbert]

yes, for some reason it is flipping it 90 degrees…..

[Rafael Amador]

Right.
Having another look, up to the position of the shirt pocket, seems that the picture has been flipped 90 degrees.
rafael

[Joseph Owens]

[Simon Modery] “Because if the lines really go vertical it can’t be a de-interlacing issue (field lines are always horizontal).”

That’s what is really fishy with this story. Those vertical lines really more resemble some kind of DV50 loss compression.

Unless your deliverable specifically requires a frame rate conversion, there is a reason why most, if not all, of those contracts specify that the edit be carried out in the source footage native frame rate and field dominance, if there is one. Dropping the (HD?) 24p footage onto an SD 2997 timeline is the straightest, most direct route to disaster that is possible to draw. 2:3 cadence depends on interlace to work, which is one of the reasons that it is such a total disaster in Final Cut Pro, up to Version 7. FCP simply can’t do the math, because it is not field-aware.

Edit native: recompress and convert for final deliverable. In this case, the projector is finally revealing that there is a process problem.

One other issue that occurs to me is aspect ratio conversion — if the original footage was 16×9, then it is being “anamorphasized” for the SD 4×3 native aspect ratio (I don’t see letterbox being a factor here). There are issues with some format confusion between codecs making this conversion under some circumstances, and may be forcing a bad proxy render.

jPo

“I always pass on free advice — its never of any use to me” Oscar Wilde.