[Solved] Problem displaying pictures in different environment(in another computer)



  • Hi,

    I have wrote a program, It use QMovie to display a GIF picture and it work well in my computer. When I send this binary to my friend, and execute it on his computer, the picture is missing(just missing, but all other function still works well)

    I believe the source code is fine, because I can run this program. I am sure that picture file (.GIF) is in the correct path. I have no idea why the picture just can not be displayed. Does anyone met this problem before?



  • What does
    @QImageReader::supportedImageFormats();@
    output on your and on the other computer?



  • Sounds like you did not distribute the image plugins of Qt to your friend.



  • I tried to install Qt SDK on my friend's computer, and it worked.

    The output of QImageReader::supportedImageFormats() on my computer is:
    bmp
    gif
    ico
    jpeg
    jpg
    mng
    pbm
    pgm
    png
    ppm
    svg
    svgz
    tga
    tif
    tiff
    xbm
    xpm

    but on my friend's computer, it is:
    bmp
    pbm
    pgm
    png
    ppm
    xbm
    xpm

    My picture format is GIF, it is not on the list shown above.

    There is some tutorial resource:
    http://qt-project.org/doc/qt-4.8/deployment-windows.html

    After put the plugin dll to the correct path. Now it works for all computers with no Qt SDK installation. Thank you for your kindly help.

    I have one last question. How can I know which plugin I should pack before deploying to another computer? Is there any tool or something which can provide clue to find the which plugin was missing?



  • The only thing I can say is: test. Qt loads all plugins it finds at initialization, so you can't use a tool like dependency walker.


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