De-Interlace multiple clips at once

Discussion in 'Amateur Video Production' started by Dr Phil, Dec 1, 2003.

  1. Dr Phil

    Dr Phil Guest

    When I add photo (jpg, bmp+++) to a project in Premiere (Pro), I always
    De-Interlace the pictures to avoid "stutters" when viewing the on the TV.
    I do this by right clicking the clip, Frame Hold, and then choose
    De-Interlace.
    The problem is that I have to do this at each Clip!!
    When I drag a box to mark all the clips, the option is not available.
    It has to be an easier way??

    Phil
     
    Dr Phil, Dec 1, 2003
    #1
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  2. Dr Phil

    Will Dormann Guest


    How can a still image need to be de-interlaced? I don't use Premiere,
    so maybe I'll just shut up...


    -WD
     
    Will Dormann, Dec 1, 2003
    #2
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  3. Dr Phil

    DavesVideo Guest

    How can a still image need to be de-interlaced? I don't use Premiere,
    so maybe I'll just shut up...>>

    Premiere or iMovie, a still should not need interlacing, unless it was
    taken from a frame grab of video.



    Dave
    http://members.tripod.com/~VideoDave
     
    DavesVideo, Dec 2, 2003
    #3
  4. Dr Phil

    Dr Phil Guest

    Hi Dave

    Yes, I know this sounds strange. Photo files should not need De-interlaced.
    I used to only De-interlace grapped pictures, but for some reasons I think
    ordinary jpg/bmp... have a small "jitter" when showed on the TV. Especially
    on the sides of the photo if you know what I mean.
    And when I De-Interlace, this jitter is gone... Hmmm...

    Phil.
     
    Dr Phil, Dec 2, 2003
    #4
  5. Dr Phil

    DavesVideo Guest

    Yes, I know this sounds strange. Photo files should not need De-interlaced.
    I used to only De-interlace grapped pictures, but for some reasons I think
    ordinary jpg/bmp... have a small "jitter" when showed on the TV.>>

    Well, there are actually some cases where jitter will be seen on graphics.
    If there are some very thin lines for example a one pixel thick horizontal line
    section. That line will be in one field and not in the next and so will appear
    to jitter. If that is the case, you probably don't need to deinterlace, adding
    a small blur may be enough.

    Dave
    http://members.tripod.com/~VideoDave
     
    DavesVideo, Dec 2, 2003
    #5
  6. Dr Phil

    Dr Phil Guest

    Thanks Dave.
    I'll try this.
    But how do I add this blur to several clips at once?

    Philip
     
    Dr Phil, Dec 2, 2003
    #6
  7. Dr Phil

    DavesVideo Guest

    I'll try this.
    But how do I add this blur to several clips at once?>>

    I don't know if is easy to do in Premiere, I know it's a piece O'cake in
    iMovie. But if there is no easy way, I would make a clip that is made up of
    single frames of your various stills, then apply the blur to that clip and then
    extract the individual still frames from the new clip. Might it not be easier
    to apply the blurs when you are working in your photo program?


    Dave
    http://members.tripod.com/~VideoDave
     
    DavesVideo, Dec 2, 2003
    #7
  8. Dr Phil

    Hughy Guest


    Thats not a good idea.

    Don't de-interlace, you're reducing the resolution unneccessarily.
    Photos obtained from sources other than video cameras don't need it, as
    they almost always acquire their image in a single instant of time.

    If the sharpness is a little too crisp and it "shimmers", you might need
    to deflicker it (don't even do this, unless it is needed). Some capture
    cards eg. DVStorm, have a wonderful adjustable deflicker, you apply only
    as much as is needed - giving the best resolution available without undue
    line blending. The deflicker tool in old Premiere versions is an
    all-or-nothing affair, but still much better than an unneccessary
    deinterlace (*all* of your original picture information is still there,
    albeit a trifle blurred vertically, rather than half of it being thrown
    out and
    replaced by interpolation, as happens in non enhanced deinterlace
    operations).

    Sorry, can't help you with Prem Pro tools, but if you choose what needs
    to be deflickered and what doesn't, you'll want to do it individually in
    any case.

    Hughy.
     
    Hughy, Dec 3, 2003
    #8
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