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Can't view video thumbnails. Grey with exe. type in box

874 Views 18 Replies Latest reply: May 6, 2012 9:31 PM by kerrynfromvic RSS
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kerrynfromvic Calculating status...
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May 5, 2012 4:51 AM

When I download videos from my camcorder, they show a grey image and have green exe. written in the box. The only way I can view the content is to open it in VLC, but then I can't find VLC from the finder. Also there are tiny horizontal black lines all through the video. I can play the videos on Windows and no black lines appear. How can I view the thumbnail and get rid of the black lines?

Mac Pro
  • Linc Davis Level 10 Level 10 (107,860 points)

    Open the Info window for one of the files. What is its filename extension, if any?

  • Limnos Level 8 Level 8 (36,585 points)
  • Linc Davis Level 10 Level 10 (107,860 points)

    Changing the extension to "mpg" should cause the files to be handled in the way you expect. I can't help you with the quality issue. Try playing them in VLC.

  • Linc Davis Level 10 Level 10 (107,860 points)

    Any ideas also about the black lines?

     

    The camera is outputting video in a format that QuickTime doesn't fully support. Though it's unlikely, the manufacturer might provide a QuickTime component or some other kind of software to convert the files.

  • Limnos Level 8 Level 8 (36,585 points)

    According to the link I provided earlier it seems the video is provided in mpeg-2 format. I don't recall your providing information as to camera model for us to check on the formats provided.  Anyway, I use an older Mac so I can only reference things to it and what I have read here.  mpeg-2 format is not supported by Quicktime and in fact you used to (and maybe still do) have to buy the mpeg-2 playback component from Apple in order for Quicktime to play it or to enable decoding in some popular applications such as MPEGStreamclip.  VLC apparently has the codec built in but unless an application is built to borrow the codec from VLC then only VLC can use it.

     

    Just changing extensions doesn't enable playback if the application cannot do it. Changing extensions just gets some applications that can play mpeg-2 to have a look at the video even though they don't think they can if all they see is .MOD.

     

    On the black lines, again I don't know your model camera (it really would help to have more information) but it could possibly be interlacing.  This is an older format from the tube style TV era but who knows what settings you have on your camera.  Do a web search for what interlacing is about, but it is particularly noticeable on action shots, especially with horizontal panning.  Most video encoding applications have a place where you can de-interlace the video while encoding, turning it into progressive.

  • Linc Davis Level 10 Level 10 (107,860 points)

    I am just about to purchase the Mpeg-2 playback component from Apple...

     

    If you're running Lion, that component isn't needed and won't work.

  • Limnos Level 8 Level 8 (36,585 points)

    Thanks Linc Davis, I warned the OP I'm still running Tiger.

     

    By applications I mean what you are using already. For example, Handbrake has an option to de-interlace when you convert the format from mpeg-2 to mp4.  So does mpegStreamclip.

     

    Oh, if you're playing back with VLC there is a deinterlace feature in the video menu (at least on my older version   )

    G4 Quicksilver 2x1GHz 250/120GB HDs, Mac OS X (10.4.11), OS9.2.2, iTunes7.5, QT7.4&QTP2.5.1
  • Limnos Level 8 Level 8 (36,585 points)

    Again, I can only reference with an older version of HB.  In my version there's a "Picture settings" button and that takes you to a window with deinterlace on the right panel.  Which option you select is up to you.  I think maybe the next to fastest one is okay.

     

    Note my earlier edit about deinterlace in VLC.

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