Converting 24fps to NTSC DV...

Discussion in 'Amateur Video Production' started by snooze reader, Nov 29, 2004.

  1. I have computer generated animation frames output at 24 fps. I want to
    convert the frames to miniDV format, so I need to 1) resize them 2)
    change the aspect ratio (square pixels of original images ->
    rectangular pixels of video) and 3) change the 24fps to 29.97 FPS. I
    assumed I could do this completely in Final Cut Pro, by simply changing
    the output sequence settings to miniDV, and rendering. But I've been
    told that I would get better results by taking the source clips into
    After Effects, and doing the time blending and resizing there, and use
    Final Cut Pro only for editing. Does anyone have any opinions on the
    matter? Are there any good web documents on converting computer
    generated animation frames to video, and how to convert and
    account for the different pixel aspect ratios of computers vs video?

    Thanks!
     
    snooze reader, Nov 29, 2004
    #1
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  2. : I have computer generated animation frames output at 24 fps. I want to
    : convert the frames to miniDV format, so I need to 1) resize them 2)
    : change the aspect ratio (square pixels of original images ->
    : rectangular pixels of video) and 3) change the 24fps to 29.97 FPS. I
    : assumed I could do this completely in Final Cut Pro, by simply changing
    : the output sequence settings to miniDV, and rendering. But I've been
    : told that I would get better results by taking the source clips into
    : After Effects, and doing the time blending and resizing there, and use
    : Final Cut Pro only for editing. Does anyone have any opinions on the
    : matter? Are there any good web documents on converting computer
    : generated animation frames to video, and how to convert and
    : account for the different pixel aspect ratios of computers vs video?

    I would try AVISynth doing it. Go to www.avisynth.org. It's a bit complicated
    but should work. I've done the opposite.

    --Leonid
     
    Leonid Makarovsky, Nov 29, 2004
    #2
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  3. If you have After Effects you can add your 24 fps source to a new
    composition. Set the composition for the NTSC DV preset but set the
    comp frame rate to 24 fps. I think AE will take care of the pixel aspect
    ratio but you'll probably have to resize the source to fit the
    composition. In other words if your source is 640x480 square it will be
    fine in a 720x480 rect composition. If your source doesn't match the
    frame aspect ratio you'll have to resize and will have black bars around
    some of the sides.

    The NTSC frame rate will be output when you render the composition.
    Under "Render Settings: Time Sampling" set "Field Render" to lower and
    set "3:2 Pulldown" to "WSSWW"

    I haven't done this in awhile so some of this might be off a little.
    You may have to experiment a bit but this is basically how you do it.
    You might also lookup "pulldown" in the After Effects help file.
     
    Brenna Hughes, Nov 29, 2004
    #3
  4. Have you tried JES Deinterlacer?

    Jan.
     
    Jan E. Schotsman, Dec 3, 2004
    #4
  5. snooze reader

    Dan Maas Guest

    The aspect ratio is not a problem. As long as your frames are intended
    for a 4 by 3 display, then just rescaling them to 720x480 will work
    fine. FCP will probably even do this by default when you put the
    frames on your timeline.

    To change the frame rate you could use Final Cut Pro's time
    stretching, but that will look terrible. The correct way to convert
    24fps material to video rate is by applying 3:2 pulldown. After
    Effects can do this, and there is also an inexpensive Final Cut Pro
    plugin that will do it (the name escapes me, sorry). But FCP out of
    the box cannot apply pulldown (one of my peeves - Cinema Tools can
    remove, but not apply, 3:2 pulldown).

    Regards,
    Dan
     
    Dan Maas, Dec 4, 2004
    #5
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