Creative Communities of the World Forums

The peer to peer support community for media production professionals.

Activity Forums Apple Final Cut Pro Legacy Black bars in DV files after exporting with MPEG Streamclip?

  • Black bars in DV files after exporting with MPEG Streamclip?

    Posted by Matthew Shaw on July 16, 2010 at 4:49 pm

    Sorry if this is a dumb question, but I couldn’t find the answer in the FAQ…

    Sometimes when i view an AVI in MPEG Streamclip, it takes up the whole screen and there are no black bars or anything, but then when i export it to DV with the 4:3 aspect ratio and play it back, it has thin black bars on the tops and sides. Why does this happen?

    Just to let you know what I’m doing: I am editing a bunch of video clips together in FCP and iMovie and I’m trying to avoid any black bars around the edges of the clips. So I am using MPEG Streamclip to export the AVIs to DV files while using the “cropping” tool.

    Matthew Shaw replied 16 years, 1 month ago 4 Members · 13 Replies
  • 13 Replies
  • Jeremy Garchow

    July 16, 2010 at 5:08 pm

    What frame size are the AVIs?

  • Matthew Shaw

    July 16, 2010 at 5:37 pm

    Well I downloaded them from youtube, I didn’t create them, there are a lot of different ones. I’m not sure how to find this out. But when I export to DV using MPEG Streamclip, I pick 4:3

  • Jeremy Garchow

    July 16, 2010 at 5:43 pm

    [Matthew Shaw] “But when I export to DV using MPEG Streamclip, I pick 4:3”

    My guess is that the movies are smaller than 720×480 to begin with.

  • Matthew Shaw

    July 16, 2010 at 11:11 pm

    I see, but then why are there not any black bars when I first play the AVI?

    They only appear after I’ve exported to DV. Which really sucks, because I have to Preview each DV to see if it needs to be cropped before importing into FCP/iMovie.

  • Jeremy Garchow

    July 16, 2010 at 11:26 pm

    Because the files are playing back at their native raster. If you open an avi file that corresponds to a dv file with black bars in QuickTime, what’s the frame size?

  • Matthew Shaw

    July 17, 2010 at 5:20 pm

    Hi again,

    I think I see what you’re saying. I don’t have Quicktime on this computer, but when I open the “Stream Info” in MPEG Streamclip it says:

    H.264, 160×120, 10 fps, 125 kbps

    So I guess you are right, it is not 4:3. I guess this means I have to crop each one while exporting, right?

    If this is right, is there anyway to automatically calculate the cropping values (i.e. margin numbers) in order to get rid of the black bars? Or do I have to input the margin numbers, preview it, then adjust the numbers accordingly? Is this the best way to go about this?

    Thanks for your help!

  • Jeremy Garchow

    July 17, 2010 at 5:38 pm

    [Matthew Shaw] “H.264, 160×120, 10 fps, 125 kbps”

    Wow, that’s really low resolution. 160×120 is 4:3, you have to use the scaling option in Mpeg Streamclip.

    [Matthew Shaw] “I don’t have Quicktime on this computer”

    Are you even on a mac?

  • Matthew Shaw

    July 18, 2010 at 12:25 am

    Do you mean that I check the “Interlaced Scaling” box when I export?

    And yes I am on a Powerbook, I just uninstalled Quicktime long time ago because I like Streamclip better.

  • Alexander Kallas

    July 18, 2010 at 12:02 pm

    [Matthew Shaw] ” I just uninstalled Quicktime long time ago because I like Streamclip better.”

    …this is just unbelieveable! QT is integral to Final Cut Studio. What are you doing?

    Cheers
    Alexander

  • John Pale

    July 18, 2010 at 3:30 pm

    He means he trashed QuickTime Player. It’s pretty much impossible to uninstall QuickTime in OSX.

Page 1 of 2

We use anonymous cookies to give you the best experience we can.
Our Privacy policy | GDPR Policy