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Forum Update on Tuesday, May 27th 2025

How to using GIF image for QT ?

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  • N Offline
    N Offline
    Nguyen Thang Phong
    wrote on last edited by Nguyen Thang Phong
    #3

    @JonB
    m_movie = new QMovie(gif);
    m_label->setMovie(m_movie);
    m_movie->start();
    and add QTPLUGIN += qgif into file .pro
    But not display when check using
    qDebug() << "supported formats: " << QImageReader::supportedImageFormats();
    supported formats: QList("bmp", "pbm", "pgm", "png", "ppm", "xbm", "xpm")

    JonBJ JoeCFDJ 2 Replies Last reply
    0
    • N Nguyen Thang Phong

      @JonB
      m_movie = new QMovie(gif);
      m_label->setMovie(m_movie);
      m_movie->start();
      and add QTPLUGIN += qgif into file .pro
      But not display when check using
      qDebug() << "supported formats: " << QImageReader::supportedImageFormats();
      supported formats: QList("bmp", "pbm", "pgm", "png", "ppm", "xbm", "xpm")

      JonBJ Offline
      JonBJ Offline
      JonB
      wrote on last edited by JonB
      #4

      @Nguyen-Thang-Phong Per https://forum.qt.io/topic/53280/qmovie-gif-and-qrc where is your qgif.dll? Assuming that is still needed for Qt6.

      1 Reply Last reply
      0
      • N Offline
        N Offline
        Nguyen Thang Phong
        wrote on last edited by
        #5

        @JonB
        I build qt static to custom installer framework is the path plugins/imageformats/qgif.lib, but when using binary creator to build app.exe using QLabel and QMovie but not display image ?

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        0
        • Christian EhrlicherC Offline
          Christian EhrlicherC Offline
          Christian Ehrlicher
          Lifetime Qt Champion
          wrote on last edited by
          #6

          See https://doc.qt.io/qt-6/qtplugin.html#Q_IMPORT_PLUGIN and https://doc.qt.io/qt-6/plugins-howto.html#static-plugin on how to use static plugins

          Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
          Visit the Qt Academy at https://academy.qt.io/catalog

          1 Reply Last reply
          2
          • N Offline
            N Offline
            Nguyen Thang Phong
            wrote on last edited by
            #7

            @Christian-Ehrlicher @JonB
            I added QTPLUSGIN += qgif into installer.pro
            After, I build source installer framework done.
            But I tested not display GIF image.

            1 Reply Last reply
            0
            • Christian EhrlicherC Offline
              Christian EhrlicherC Offline
              Christian Ehrlicher
              Lifetime Qt Champion
              wrote on last edited by
              #8

              My post contains two links...

              Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
              Visit the Qt Academy at https://academy.qt.io/catalog

              1 Reply Last reply
              1
              • N Offline
                N Offline
                Nguyen Thang Phong
                wrote on last edited by
                #9

                @Christian-Ehrlicher

                image.png
                I tried but not working

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                0
                • Christian EhrlicherC Offline
                  Christian EhrlicherC Offline
                  Christian Ehrlicher
                  Lifetime Qt Champion
                  wrote on last edited by
                  #10

                  Then the path you given to QMovie does not exist. Check it

                  Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
                  Visit the Qt Academy at https://academy.qt.io/catalog

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                  • N Offline
                    N Offline
                    Nguyen Thang Phong
                    wrote on last edited by
                    #11

                    @Christian-Ehrlicher
                    I using pixmap to assign direct for GIF image but run not appear ?
                    No away to solution ...

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                    0
                    • Christian EhrlicherC Offline
                      Christian EhrlicherC Offline
                      Christian Ehrlicher
                      Lifetime Qt Champion
                      wrote on last edited by
                      #12

                      Again: Check if the file exists. E.g. with QFile::exists() ...

                      Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
                      Visit the Qt Academy at https://academy.qt.io/catalog

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                      • N Offline
                        N Offline
                        Nguyen Thang Phong
                        wrote on last edited by Nguyen Thang Phong
                        #13

                        @Christian-Ehrlicher @JonB
                        image.png
                        So, check supported image format to print formats bmp,pbm,pgm,png,ppm,xbm,xpm not found gif ?

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                        0
                        • JonBJ Offline
                          JonBJ Offline
                          JonB
                          wrote on last edited by JonB
                          #14

                          I do not know for sure that GIF should appear in supportedImageFormats(), though I agree I would have thought it should.
                          I suggested earlier that you try to display a GIF as an image on a QLabel, not in a QMovie.
                          @Christian-Ehrlicher asked you to verify that the path to the GIF file you test really does exist via QFile::exists().

                          JoeCFDJ 1 Reply Last reply
                          0
                          • N Offline
                            N Offline
                            Nguyen Thang Phong
                            wrote on last edited by
                            #15

                            @Christian-Ehrlicher @JonB
                            image.png
                            I tried add to pixmap

                            JonBJ 1 Reply Last reply
                            0
                            • N Nguyen Thang Phong

                              @Christian-Ehrlicher @JonB
                              image.png
                              I tried add to pixmap

                              JonBJ Offline
                              JonBJ Offline
                              JonB
                              wrote on last edited by
                              #16

                              @Nguyen-Thang-Phong
                              I do not use resources and I do not know whether that ../..../additonal.qrc path is right.
                              What does QFile::exists(":/loading.gif") return?
                              If you place a .gif file in your actual file system and try

                              qDebug() << QFile::exists("c:/full/path/to/file.gif");
                              // `label` is some `QLabel *` you have created and is visible in your UI
                              label->setPixmap(new QPixmap("c:/full/path/to/file.gif"));
                              

                              (I think the above is right, untested, adjust as necessary) does that work?

                              Otherwise I guess it is indeed a "static" issue, and only someone like @Christian-Ehrlicher knows what the issue might be.

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                              0
                              • JonBJ JonB

                                I do not know for sure that GIF should appear in supportedImageFormats(), though I agree I would have thought it should.
                                I suggested earlier that you try to display a GIF as an image on a QLabel, not in a QMovie.
                                @Christian-Ehrlicher asked you to verify that the path to the GIF file you test really does exist via QFile::exists().

                                JoeCFDJ Offline
                                JoeCFDJ Offline
                                JoeCFD
                                wrote on last edited by JoeCFD
                                #17

                                @JonB I play a GIF file in a QMovie in a QLabel.

                                JonBJ 1 Reply Last reply
                                0
                                • N Nguyen Thang Phong

                                  @JonB
                                  m_movie = new QMovie(gif);
                                  m_label->setMovie(m_movie);
                                  m_movie->start();
                                  and add QTPLUGIN += qgif into file .pro
                                  But not display when check using
                                  qDebug() << "supported formats: " << QImageReader::supportedImageFormats();
                                  supported formats: QList("bmp", "pbm", "pgm", "png", "ppm", "xbm", "xpm")

                                  JoeCFDJ Offline
                                  JoeCFDJ Offline
                                  JoeCFD
                                  wrote on last edited by JoeCFD
                                  #18

                                  @Nguyen-Thang-Phong Did you try the following in the pro file?

                                  CONFIG   += static
                                  # For static plugins
                                  static {
                                      # Include the GIF plugin
                                      QTPLUGIN += qgif
                                  }
                                  
                                  N 1 Reply Last reply
                                  0
                                  • JoeCFDJ JoeCFD

                                    @JonB I play a GIF file in a QMovie in a QLabel.

                                    JonBJ Offline
                                    JonBJ Offline
                                    JonB
                                    wrote on last edited by
                                    #19

                                    @JoeCFD said in How to using GIF image for QT ?:

                                    @JonB I play a GIF file in a QMovie in a QLabel.

                                    I know you do. And I have suggested removing the QMovie level, to eliminate that, by assigning a created QPixmap from a GIF file directly to the QLabel, which can display GIF images, to see if that works. And I have also suggested using an external, actual GIF file instead of one in a Qt resource, and various QFile::exists() checks to verify the file or resource can be found. Up to you whether you do these things, but they check for various problems. It may well be that your issue is static-related and these will not show anything wrong, but it is what I would do before proceeding.

                                    JoeCFDJ 1 Reply Last reply
                                    0
                                    • JonBJ JonB

                                      @JoeCFD said in How to using GIF image for QT ?:

                                      @JonB I play a GIF file in a QMovie in a QLabel.

                                      I know you do. And I have suggested removing the QMovie level, to eliminate that, by assigning a created QPixmap from a GIF file directly to the QLabel, which can display GIF images, to see if that works. And I have also suggested using an external, actual GIF file instead of one in a Qt resource, and various QFile::exists() checks to verify the file or resource can be found. Up to you whether you do these things, but they check for various problems. It may well be that your issue is static-related and these will not show anything wrong, but it is what I would do before proceeding.

                                      JoeCFDJ Offline
                                      JoeCFDJ Offline
                                      JoeCFD
                                      wrote on last edited by
                                      #20

                                      @JonB It is not a QMovie issue. May be better to try to make his code to run dynamically with gif plugin first. And then build his app with gif plugin statically.

                                      JonBJ 1 Reply Last reply
                                      1
                                      • JoeCFDJ JoeCFD

                                        @JonB It is not a QMovie issue. May be better to try to make his code to run dynamically with gif plugin first. And then build his app with gif plugin statically.

                                        JonBJ Offline
                                        JonBJ Offline
                                        JonB
                                        wrote on last edited by JonB
                                        #21

                                        @JoeCFD
                                        I understand, but was trying to simplify, and follow @Christian-Ehrlicher's suggestion of checking file exists and removing resources from OP's situation, as I don't know what he actually has there/where.

                                        If you are happy to take over here that's fine :) If the fact that the OP's supportedImageFormats() does not include GIF indicates that is where the problem lies then obviously all my questions are not relevant.

                                        1 Reply Last reply
                                        0
                                        • JoeCFDJ JoeCFD

                                          @Nguyen-Thang-Phong Did you try the following in the pro file?

                                          CONFIG   += static
                                          # For static plugins
                                          static {
                                              # Include the GIF plugin
                                              QTPLUGIN += qgif
                                          }
                                          
                                          N Offline
                                          N Offline
                                          Nguyen Thang Phong
                                          wrote on last edited by
                                          #22

                                          @JoeCFD
                                          Thank you, I will try

                                          1 Reply Last reply
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