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Forums Adobe Premiere Pro deinterlace originally film footage.

  • deinterlace originally film footage.

  • therman mermehn

    August 16, 2017 at 8:39 pm

    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.

  • John Heiser

    August 16, 2017 at 9:02 pm

    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.

    Good luck!

  • John Heiser

    August 16, 2017 at 9:11 pm

    A quick search here in the Premiere forum yielded this post from a few years ago:

    Last time I tested, if you add a 29.97i clip to a 23.976p or 24p then Premiere will reverse the pull down, guessing simple 3:2 pulldown.

    If the clip looks wonky, then you can right click > interpret footage and set it to advanced pulldown or have it guess.

    It may have functioned differently in previous versions but Premiere has been quite good in recent years about making footage conforming seamless until you go in and tweak clip parameters.

    I haven’t tried this, as I don’t have any 3:2 footage, but it’s worth a try!

  • Ann Bens

    August 16, 2017 at 10:28 pm

    Post screendump of clip in Mediainfo in treeview.

    Adobe Certified Expert Premiere Pro CS6/CC
    Adobe Community Professional

  • therman mermehn

    August 16, 2017 at 10:47 pm

    ok i think i understand 3:2 pulldown a bit better.

    it would seem it changes between shots/scenes as to where the 3:2 pulldown begins

    may I ask how does the dvd footage play normally on the pc , but then when ripped it’s ripped incorrectly?

  • therman mermehn

    August 16, 2017 at 11:39 pm

    this is what the dvd file looks like

  • therman mermehn

    August 17, 2017 at 12:21 am

    ok after a bit of googling this might have something to do with pull down flags on the dvd? supposedly i need a way to remove them when ripping the video but I’m not quite sure how to do that.

  • Chris Wright

    August 17, 2017 at 12:40 am

    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.
    W=whole frame
    S=new frames

    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

  • therman mermehn

    August 17, 2017 at 2:12 am

    ok alchemist OD appears to not be a free program

    virtual dub doesn’t appear to support vob files at all

    and again final cut pro is also not a free program.

    vob files will either crash premiere if i try to open them , or if i try to open vob files in after effects they appear corrupted.

  • Chris Wright

    August 17, 2017 at 2:48 am

    aw, direct opening vob’s. gotcha.

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