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Activity Forums Adobe After Effects Interlacing problem

  • Interlacing problem

    Posted by Randall Murphy on August 10, 2007 at 10:25 pm

    I’m having problems with interlacing lines. I have DV footage shot with a DVX100B and I’ve tried without pulldown, with lower field first, and guess pulldown. Each one fixes certain issues, but there are still the lines, just different places. What can I do to get rid of all the lines?

    Randall Murphy replied 18 years, 9 months ago 2 Members · 12 Replies
  • 12 Replies
  • Kevin Camp

    August 11, 2007 at 11:51 pm

    you would only need to worry about removing a pulldown if the footage was shot as 24p… do you know if the footage was shot at 24p?

    if it was shot at 24p, are you working with individual shots or edited material? if it is individual shots, set the separate fields to none, then drag it onto the make comp icon and step through it on frame at a time, making note of the cadence from frames 1-5 (make note of whole (w) frames and interlaced or split (s) frames). then set the pulldown accordingly (ex. wwwss). this should remove the pulldown, to remove the extra frame, set the comp to 23.976 fps.

    if the footage was edited with the pulldown in place, you will need to split it up into the individual shots to effectively remove the pulldown.

    this won’t help much now, but ideally, when 24p footage is captured from tape, you should remove the pulldown and extra frame. most capture utilities and nle can be set to do this. then all editing should be done with progressive footage in a 23.976 (23.98 in fcp) timeline. the pulldown should only be added back in when the project is finished and needs to go to tape or other delivery medium for broadcast… note, you could remain in 24p if you were going to produce a progressive dvd or internet/computer playback.

  • Randall Murphy

    August 12, 2007 at 6:07 am

    It was shot in 29.97

  • Kevin Camp

    August 13, 2007 at 1:58 pm

    if it is 29.97, then you should only need to set the separate fields to upper or lower (usually lower ofr most ntsc and ntsc dv), don’t worry about pulldown, there isn’t any.

    what are you seeing when you have separate fields set to lower? are you planning to render back to interlaced, or keep it progressive?

    if you are going to reinterlace, don’t worry what the deinterlaced preview looks like, leave the correct field order for separationa nd don’t check the preserve edges, and you should be fine when the fields are rendered.

    if you are going to keep it progressive, try checking the preserve edges box if the footage interpretation. this can help smooth some of the edges that may look a bit jaggy after deinterlacing with ae.

    in addition, you might also try turning on frame blending to the lower setting (frame mix). this will blend frames created with the upper field with the frames created from the lower field, and may help out with some footage.

    Kevin Camp
    Designer – KCPQ, KMYQ & KRCW

  • Randall Murphy

    August 13, 2007 at 3:10 pm

    I tried all those suggestions and still a problem. The footage is an interview and the problem areas are the eyes and mouth. When the subject blinks or talks, that’s when there are lines across the eyes or mouth. The best so far is with the interpret footage to off. Not pull down or up. When off, lines throughout the shot smooth out. The person also cleans up, but no setting has taken the eyes and mouth to smooth. Is there any way that when this is viewed on a “regular” television that the lines will go away?

  • Randall Murphy

    August 13, 2007 at 3:32 pm

    I tried the frame mix with the lower setting again ( I didn’t realize it was being pulled down) and shut off the pull down feature and it seems to be the best. Thanks for your help. I have another question for you. In premeire, I get audio on the playback, but non in AE. Is there a setting I’m supposed to have for playback?

  • Kevin Camp

    August 13, 2007 at 4:59 pm

    [skubeedoo] “In premeire, I get audio on the playback, but non in AE.”

    do you mean no audio in the ae preview or no audio in the final render…?

    if it is in the preview, make sure the audio is on for that layer. in the timeline, on the left side, there is a check box column for audio (looks like a little loud speaker). make sure that it is checked for your layer.

    if it is in the final render, you need to enable audio in the output module settings. from the render queue, click the output module settings. at the bottom of the settings window, there are the audio settings, turn them on and set them accordingly (make sure the audio rate matches that of the original audio). if you render with audio frequently (sith the same settings), you can create an output module that has audio render enabled so you just choose it from pulldown menu, or even make it the default.

    Kevin Camp
    Designer – KCPQ, KMYQ & KRCW

  • Randall Murphy

    August 13, 2007 at 5:48 pm

    I have it checked…I think it’s in the assigning the audio device. I have a pro audio board and it usually isn’t recognized.

    I have to say, I’ve received advice from you in the past, and you are ALWAYS right on. I hope your boss realizes what an asset you are. Thanks again for turning my project into a masterpiece!

  • Kevin Camp

    August 13, 2007 at 6:55 pm

    ae cs3 does have an audio settings preference that may help you set ae to use the correct audio device.

    i believe previous versions of ae look to the systems settings. in windows, i think you can set your default device to use the extra hardware in the sound & audio properties. on mac, its usually something like system prefs>audio>output, and select it there.

    Kevin Camp
    Designer – KCPQ, KMYQ & KRCW

  • Kevin Camp

    August 13, 2007 at 7:04 pm

    also, i’m glad you appreciate the advice, and my art director (immediate boss) knows how much i contribute, but i’m not sure those above her even understand what we do… let alone how a strong technical understanding of software, hardware and workflow can fix or even prevent problems from ever happening.

    i actually just inteviewed last week, and mentioned to the creative services director about some of the technical knowlege i could bring with me, and he just had a rather blank expression….

    oh, well. atleast it’s appreciated here,

    thanks

    Kevin Camp
    Designer – KCPQ, KMYQ & KRCW

  • Randall Murphy

    August 13, 2007 at 8:38 pm

    Haha, that’s funny. Interviewed at your company for a higher position or elsewhere?

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