Vegas:How to slow a video but preserve pitch?

Discussion in 'Amateur Video Production' started by geronimo, Oct 22, 2006.

  1. geronimo

    geronimo Guest

    In Vegas Video 6, I figured out how to slow down a MP3 while retaining
    the pitch....you right click on MP3 in time line and select
    properties, and then stretch time. However can you do the same tihing
    with a video with audio track? I tried selecting .75 playback time,
    and this did not work at all, seemed that the video was slowed while
    the audio was still full speed. It is a guitarist performance, and so
    I need to preserve the pitch of the music, but slow down the video
    movement 70 or 80 percent.
     
    geronimo, Oct 22, 2006
    #1
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  2. geronimo

    Mike Kujbida Guest


    Instead of doing slo-mo that way, try doing a Ctrl-drag to slow the clip
    down instead.
    Place the cursor at the end of the clip (it turns into a rectangle), hold
    the Ctrl down and drag the clip out as desired.
    If you have "active take information" enabled (it's under the view menu),
    it'll tell you the percentage.

    Mike
     
    Mike Kujbida, Oct 22, 2006
    #2
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  3. geronimo

    geronimo Guest

    Yea, this works for slowing the video down, but throws the audio way
    out. What I am trying to do is slow the video down AND at the same
    time slow the audio (music) track down, keeping it in sync.... but yet
    retaining the same music pitch. So the problem is, I can do what I
    need to do on the audio track....music is slowed tempo but same pitch.
    And I can slow down down the video track, no problem. But the trick is
    how to get both in sync again?
     
    geronimo, Oct 27, 2006
    #3
  4. geronimo

    Ray S Guest

    Logic says that if you lock the events together and drag them out that
    if they were in sync to begin with that they would be in sync after.

    However, this may be simply a case of - seems reasonable. I admit that I
    have to attempted this (will tonight though!) and there may be very
    valid reasons why the sync goes off. Perhaps it may have to do with
    keeping the pitch the same?
     
    Ray S, Oct 27, 2006
    #4
  5. This possible solution came to mind. I don't have the full version of Vegas,
    but Vegas Movie Studio Platinum.

    Assume that you can slow both the video and audio down to where you want the
    video to be. Then you can apply one of the audio "filters" (I forget exactly
    what the term is, sorry) that increases the pitch. You'll have to
    experiment to get the right value for increase ... and it's possible that
    the "filter" will not have the range that you need (depending on how far you
    slow down the clip) but this seems like it might work. If it does, you can
    write the values down for each of the parameters (slow down then increase
    audio pitch) so for any future clips you don't have to start from scratch
    all over again.
     
    Richard Amirault, Oct 28, 2006
    #5
  6. geronimo

    GaryT Guest

    Or, if the audio could be exported after it was stretched and and was shown
    to be still in sync with the video, then use a stand-alone audio editor
    (such as the freeware Audacity) to change the pitch, and re-import.

    Gary
     
    GaryT, Oct 28, 2006
    #6
  7. geronimo

    geronimo Guest

    Thanks...good ideas. I will experiment further. Geronimo
     
    geronimo, Oct 28, 2006
    #7
  8. geronimo

    Tony Guest

    This could done fairly easily, but you may need Sound Forge, although, Vegas MAY do it too.


    First, bring the clip into Vegas and slow it down to the desired length. Then delete the audio

    Next, bring the same clip into Sound Forge. Do a Time Stretch to the exact lenght of the Vegas
    edited clip but choose to keep the pitch. Then delete the video

    Save the Sound Forge audio and drag it into Vegas. It should sync up but if not, adjust it by a few
    milliseconds in either direction til it does.

    Tony
     
    Tony, Oct 30, 2006
    #8
  9. geronimo

    Mike Kujbida Guest


    Allow me to modify this statement.
    Before you do a Ctrl-drag, right click the audio clip, select Properties,
    and change "Time stretch/Pitch shift Method" to "Classic". Now select either
    one of the "Stretch Attributes" or "Lock to Stretch" (this greys out
    "Stretch Attributes").

    Mike
     
    Mike Kujbida, Oct 30, 2006
    #9
  10. geronimo

    Ray S Guest

    Wow! Here's an obscure little tidbit for Vegas! Thanks!
     
    Ray S, Oct 31, 2006
    #10
  11. geronimo

    geronimo Guest

    Yes this method worked. I slowed down a guitar solo video appreciably,
    while the music pitch was maintained. But there is a problem with
    sync. Initially sound is with video, but over the course of a 3 min
    video, the sound got farther and farther ahead of the video, until it
    was about 1 to 1.5 seconds ahead. Its not my XP Win media player...it
    plays other videos in sync....its just my Vegas-rendered videos. Is
    this just the result of having a not state-of-the-art system? (Asus
    A7N8X, 1 gig ram, XP 3000 CPU). When you are trying to see guitar
    fretwork in a solo slowed down for educational purposes, sync has to
    be maintained perfectly.
     
    geronimo, Nov 25, 2006
    #11
  12. geronimo

    stauffer Guest

    Cool Edit Pro, the sound editor has a function that is supposed to do
    that, though I haven't tried it. You could extract the audio channel,
    import it to CEP, stretch it, then re-import to your video editor.
     
    stauffer, Nov 26, 2006
    #12
  13. geronimo

    Mike Fields Guest

    Recognize that CEP no longer is available - they were bought
    by Adobe and CEP became (mostly) Audition 1.0 That said,
    you may find the answer you are looking for in the Adobe forums
    for Audition. They have excellent forums (or did a while back
    anyway).

    mikey
     
    Mike Fields, Nov 26, 2006
    #13
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