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  • Apple OS X

    Quicktime 720 50P playback Jerky.

    Posted by Adam Sondej on March 18, 2008 at 11:21 pm

    Hi

    I Cannot get a 1280×720 50P Photo JPEG Quicktime
    to playback smoothly from a Dual 2GHz powerPC on either a LCD video monitor
    or Panasonic PT-D4000E projector (DVI input).

    There is playback jerkiness even though
    QT movie info reports movie is playing back at 50fps
    and display sizes are optimized for QT movie size.

    Any ideas?

    Cheers

    Adam

    Adam Sondej replied 18 years, 1 month ago 2 Members · 2 Replies
  • 2 Replies

  • Zane Barker

    March 19, 2008 at 5:19 am

    What is the video file playing from. CD/DVD, hard drive (is so how is it connected). A little more info please.

    There are no “technical solutions” to your “artistic problems”.
    Don’t let technology get in the way of your creativity!

  • Adam Sondej

    March 19, 2008 at 9:27 pm

    Hi, here are some more details.

    The 50fps photojpeg QT is playing from the internal SATA HD.
    The animation is of a sphere travelling accross screen.
    Activity monitor shows quicktime process is using 35% CPU.
    QT Datarate is 5.6 Mbits/s

    Dual 2 GHz Power PC
    1.5 GB Ram
    Geforce 6600LE video card
    Dell 2407 monitor

    Changing display frequency from 60Hz to 75Hz
    alters the appearance of the playback but it is still jerky.
    Playing the animation in a HD video program onto a video monitor results in smooth playback.

    Cheers

    Adam

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