Working on Mac SNDX 5.5.3.7 in a 1080i/59.94 project. Media is from Red Epic and was transcoded in the field to DNX 220. The footage is 29.97Psf in the project. To make a 12 channel ProResHQ file I export a Reference movie from Avid without mixing down the audio. This gives me a QT ref with 12 discrete tracks. In QT Pro I rename the tracks to reflect their content. I then export to ProRes HQ 1920x1080 with 12 discrete audio tracks. In the video settings under compressor there is a check box for interlace. I haven't been in the habit of checking this box in the past and I exported my show without it checked. I can then ama link to the file and see the Psf "fields" in Avid. Everything seems fine. My question is would there be any downside to checking the interlace box in QT Pro before exporting. Psf and interlace are the same electronically with the only difference being that with Psf each field comes from the same moment in time. I'm trying to figure out what really goes on under the hood with Progressive vs Interlace when exporting to ProResHQ. Given when I ama link the supposedly exported as "progressive" file I still see the Psf fields in the 1080i/59.94 project what really happens to the video essence when the interlace check box is checked? This is very similar to exporting and interlace jpeg and opening it in Photoshop and seeing the interlace artifacts if there is motion. Then when reimporting the modified jpeg back into Avid it still gets the fields correct. I know in Photoshop I can deinterlace and pick which field I want the deinterlaced image to come from. Who is keeping track of the fields to reimport them properly?
How can I tell if a .mov is true progressive or Psf style progressive. I'm not having a technical issue but I feel I don't really know what happens under the hood. Along these same lines I know HD is odd upper field first and SD is even lower field first in US ville and it differs in other countries but if I have an HD .mov and I want to import it into my SD offline do I assign the field order based on the source file content as the import dialogue box indicates or do I call it even lower because it's going into an SD project. To take that a step further what if I'm given an SD .mov graphic for the SD offline and then come online I get an HD .mov of the same graphic. If I batch import the HD graphic will it know that because it's an HD .mov it should be imported as odd upper field first or will it import it as even lower field first because that's what's done in the offline. I can manually override the import options but I'm curious what happens if I do nothing. Anybody ever played with this concept?
John Moore
Barking Trout Productions
Studio City, CA
bigfish@pacbell.net
Barking Trout Productions
Studio City, CA
bigfish@pacbell.net
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