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With our Canon DC50 camcorder we made a movie of a video presentation on an old MacSE. The movie's images are excellent, but half-inch translucent gray bars repeatedly roll down the screen when we display the DVD movie of the video presentation on a PC or TV. When we made the movie with another camcorder (a Sony Handycam DCR-TRW260) the same problem was encountered, but when we switched off the image stabilizer on that camcorder, the rolling gray bar failed to appear. (The gray bar was replaced by a faint while line that rolled down the screen, but the movie?s text images were fuzzy and not adequately readable ? which is why we switched to the BC50.) The same thing DID NOT happen when we switched off the Canon DC50?s image stabilizer ? and we are unable to get rid of the rolling gray bar. We have uploaded part of the video presentation to our website, ? and it can be seen there, gray bars and all. The presentation, ?The Coming Revolution in Publishing,? which on our home page is identified as ?CRIP segment?, is a VOB (Visual Object, which is, I believe, mpeg2 with limitations) file, so you may or may not be able to see the problem on your PC. Point of information: The refresh rate of the MacSE?s display is 66.7 Hz. So, our question is ?How do we shoot the MacSE?s video presentation with the DC50 without incurring the rolling gray bars that appear when we present the DVD movie on a PC or TV?? Are there settings on the DC50 that we could change and that might help solve the problem? Or, other measures that would avoid the problem? We are getting ready to develop a sequel to the ?The Coming Revolution in Publishing? with a new production called ?The Coming Revolution in Writing and Reading?. The script for the sequel is on Chapters III and IV in the sequel ( ) are the principal segments of the production that have movie sequences ? so you can take a look at them to see what we are planning to do. Similar movie segments were included in the original presentation. (In the near future we hope to acquire and use Adobe Director 11.5, a new Macintosh system, and a professional camcorder setup to prepare the new production and will avoid the kinds of problems we are having in attempting to shoot the old MacSE production with the DC50. But, we want use our present resources to preserve a permanent copy of the old production as a movie on a DVD before the impending failure of our aging MacSE.)

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  • wrporter Jul 16, 2009

    Thanks for the sound advice. It was right on the mark and solved our problem. You are indeed a guru. We'll call you again the next time we need a solution to a vexing problem.
    Wayne R. Porter, CEO, The Mudoc Corporation



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Just visited your site. The video clip is too large (137 mb), so please give us some time so that we can download and analyse the video and suggest you a solution. If you have a smaller clip, you can provide the link to that so as to make the job easier for us.

Thanks for your patience.

Posted on Jul 15, 2009

  • AliTech110
    AliTech110 Jul 15, 2009


    We viewed the video footage and these are the suggestions for solution of your problem:

    1) Set the shutter selection to manual i.e; TV SHUTTER-PRIO.AE

    2) Select the shutter speed of 1/15. This will get rid of the horizontal gray scrolling bars.

    (Note that on your camera screen only the denominator is displayed – "TV 15” indicates a shutter speed of 1/15 second)

    Also, we noted that the color of the screen was not properly visible. So, manual white balancing is required to reproduce the correct color.

    Hope this solves your problem. For more assistance please reply to this post.

    Thanks. All the Best.



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