This is more a technical exercise than anything else. I have chosen a Tupperware commercial (38.6 MB, MPEG2) as my test file: https://archive.org/details/tupperware_2
I'd like to know what's going on with this file.
Quicktime reports the file as: MPEG2 muxed, 320 x 240, 29.97 fps, PAR =1, 4069 kbps. QT plays it as described. i.e. a landscape-type image, 320 x 240.
MediaInfo and MPEG Stremclip report the file as MPEG2, 352 x 480, 4:3, 29.97 fps, interlaced, bottom field first.
Premiere reports the file as 352 x 480 (1.8182), 29.97 fps, LFF. It sees the file as (352 x 1.8182) x 480 = 640 x 480.
Interlaced or Progressive?
When I step through the video in QT or Premiere one frame at a time, I can see no evidence that this video is interlaced. i.e. I was expecting to see slightly blurred images regularly as the 3:2 pulldown came into play. But no, as I step through the video it seems to be to be progressive.
This is what I think has happened to this video. Please feel free to point out any errors.
What is the technical name for adding frames in the way described above?
How can the extra frames be removed? It should be as easy as selecting the first frame and then asking the software to automatically remove frame 6, 12, 18, 24, 30 to get back to the original. What software can do that?
If the file is progressive, why is it reported as interlaced?