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  • 720p slight flicker in sd

    Posted by Dane Henry on June 4, 2008 at 5:29 pm

    Getting a slight flicker with my 720p video when letterboxed in an SD sequence. It is most noticeable on the top & lower boarders of the letterbox and horizontal movement. Only visible on my video monitor. Is this a field dominance issue? With my HD 1080i I would just reverse it to lower. I thought progressive played interlaced on interlaced equipment.

    Should I be interlacing my progressive video to a Lower(even) Field field dominance?

    Thanks

    Dane H

    Jeremy Garchow replied 17 years, 11 months ago 3 Members · 15 Replies
  • 15 Replies
  • Jeremy Garchow

    June 4, 2008 at 5:58 pm

    [Dane Henry] “Should I be interlacing my progressive video to a Lower(even) Field field dominance? “

    No.

    I bet the letterbox is hitting at a particular line on your monitor causing it to appear to flicker.

    That happens on exactly one CRT monitor here, but not on the other three.

  • Dane Henry

    June 4, 2008 at 6:14 pm

    Jeremy,
    Thanks for the response,

    What about the flicker on hoizontal movement?
    I’m dropping a finished 720p movie into an 8 bit SD timeline.

    I did a search on posts and got this:

    FCP doesent do a good job of resizing. So, I take the 720p to compressor and output an 8 bit uncompressed letterboxed. Then bring it back into FCP to layoff to betaSP.

    Any other recommendations?

    Dane H

    FCP 6.0.2
    3ghz 8core MacPro
    4gb Ram
    Kona Lhe
    Sony PVW 2800

  • Jeremy Garchow

    June 4, 2008 at 6:23 pm

    What frame rate is your 720p footage?

  • Dane Henry

    June 4, 2008 at 6:37 pm

    30fps, edited in a 29.97 timebase but with a Quicktime video setting of DvcPro HD 720p60.

    Would I have this issue if the video was shot at 60p?

    Should I/Can I make a new preset with kona card for 720p30?

    Thanks,

    Dane H

  • Jeremy Garchow

    June 4, 2008 at 6:48 pm

    [Dane Henry] “Should I/Can I make a new preset with kona card for 720p30? “

    You captured firewire with the 720p30 preset? Is that right?

    [Dane Henry] “Would I have this issue if the video was shot at 60p? “

    Nope, you’re fine. You’d have other issues, but we won’t get into that now.

    As long as you drop into a 29.97 timeline with a field dominance of ‘none’ you should be good.

    Compressor does work well, though, if you have the time.

    I would recommend Compressor over letting FCP handle it.

    Jeremy

  • Dane Henry

    June 4, 2008 at 7:23 pm

    Jeremy,

    It’s P2 footage shot at 30p. It was a series of long interviews, 30p for a longer record run time.

    I must have something else set wrong, because it just doesn’t look as smooth as my interlaced footage on the monitor.

    I just finished using compressor on one of the edits. The noticeable flicker on the top and bottom of the letterbox are gone but there is still a slight flicker on motion.

    I’ll try a 30p setting with the Kona.

    Thanks for your help,

    Dane H

  • Jeremy Garchow

    June 4, 2008 at 7:58 pm

    [Dane Henry] “I must have something else set wrong, because it just doesn’t look as smooth as my interlaced footage on the monitor. “

    You realize you are looking at progressive material and there’s an inherent judder, correct?

  • Dane Henry

    June 4, 2008 at 8:09 pm

    Is there no way to fix that?

    If not, it’s too bad for the TV viewers, but great for me, I would be super glad to be finished with this project!

    Thanks,

    -Dane H

  • Jeremy Garchow

    June 4, 2008 at 8:14 pm

    Dane it’s really hard if I can’t see what you are seeing. Is there ANY way you can post a second or two or the uncompressed SD material so I can look at it? i just want to be sure.

    Jeremy

  • Dane Henry

    June 4, 2008 at 10:48 pm
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