I have a very old television show I’m working on deinterlacing. I do know the show was originally filmed and not taped at 24fps. However , at the time it was changed to a 29.97fps interlaced file which worked fine for broadcast at the time but not so much now and i’d like to change it back to 24fps. The issue I’m having is when moving the file into premiere , I can interpret footage to either use low or upper field , this however results in quality loss which would seem normal , however… some of the frames are not interlaced in the file , and those frames look very good. when I select to use upper or lower fields it essentially ruins all of the frames and not just the interlaced ones.
So essentially it’s like this , how do I repair a video file that was originally 24fps film that was moved into a 29.97 interlaced file? I know that the interlaced frames are just frames from the original 24fps film so technically there isn’t real fields.
Whats frustrating is when I play the dvd the source material is on , it plays normally and looks fine.
You might want to jump into AfterEffects to do this, and from there export a file you can work with in Premiere. I’ve looked in Premiere and can’t find a ready way to do it. Here’s a link to the AfterEffects workflow:
The tricky part is going to be making sure the pulldown cadence is consistent throughout the entire program. If it was indeed one long playout from film to tape, you’re in business. If it’s 23.98fps film footage transferred to 29.97fps tape and then edited, the cadence may change at each edit and you’re in for a world of hurt.
1. does it work if you interpret video fields lower or upper and place into 23.976 sequence? or do you still see fields?
try both upper and lower first.
2. sounds like an old school problem. first, put it in after effects, interpret fields up/low into a new composition 23.976. it should spread the frames correctly. if not, then click detect guess pulldown type.
if that doesn’t work, then place video into a composition double its framerate 59.94. then hit PgDn and write down 10 frames for us in this format. Each field will then get its own frame.
If you get a pattern after 10 frames, it should look like WWSSW then another WWSSW or something. then go back, and change ae’s reverse pulldown cadence to this.
3. if you have no repeating pattern whatsoever, then the pulldown cadence is variably changing, in which case use alchemist OD, virtualdub, fcp compressor to remove adaptive ivtc. which can include 2:3:3:2, 2:3:2:3 and the strange 2:2:2:4