As discussed on the mailing list https://lists.webkit.org/pipermail/webkit-qt/2011-June/001633.html, it is better for the Qt port to move away from Qt Multimedia as the default backends on Linux and Mac. We can rely on QuickTime and GStreamer backends inside WebKit as they are more easy to change, more reliable to use and we share the maintenance with the WebKit community. USE_QTMULTIMEDIA=1 is now the option to force the usage of Qt Multimedia. I'll commit later this patch when we have a public build bot on Mac and the 58548 will be fixed.
Created attachment 98768 [details] Patch
Comment on attachment 98768 [details] Patch View in context: https://bugs.webkit.org/attachment.cgi?id=98768&action=review > Source/WebCore/WebCore.pri:-257 > - DEFINES += WTF_USE_QTKIT=1 I do not see where QuickTime backend is set as a default media player. Where is WTF_USE_QTKIT set to 1 ? > Source/WebCore/WebCore.pri:-266 > - DEFINES += WTF_USE_GSTREAMER=1 Same as above; where is WTF_USE_GSTREAMER set to 1 ?
Comment on attachment 98768 [details] Patch View in context: https://bugs.webkit.org/attachment.cgi?id=98768&action=review >> Source/WebCore/WebCore.pri:-257 >> - DEFINES += WTF_USE_QTKIT=1 > > I do not see where QuickTime backend is set as a default media player. Where is WTF_USE_QTKIT set to 1 ? feature.pri which is include everywhere first. >> Source/WebCore/WebCore.pri:-266 >> - DEFINES += WTF_USE_GSTREAMER=1 > > Same as above; where is WTF_USE_GSTREAMER set to 1 ? Ditto.
Comment on attachment 98768 [details] Patch View in context: https://bugs.webkit.org/attachment.cgi?id=98768&action=review Overall the direction looks good to me. > Source/WebCore/features.pri:213 > DEFINES -= ENABLE_VIDEO=0 > DEFINES += ENABLE_VIDEO=1 > DEFINES -= WTF_USE_QT_MULTIMEDIA=0 > DEFINES += WTF_USE_QT_MULTIMEDIA=1 > + DEFINES -= WTF_USE_QTKIT=1 > + DEFINES += WTF_USE_QTKIT=0 > + DEFINES -= WTF_USE_GSTREAMER=1 > + DEFINES += WTF_USE_GSTREAMER=0 Are the "DEFINES += XXX=0" statements are really necessary? It seems that the corresponding tests are all testing for "contains(DEFINES, XXX=1)" I also find it hard to maintain and read. Would the following work instead ? # HTML5 Media Support !contains(DEFINES, ENABLE_VIDEO=.) { linux-*|mac|contains(MOBILITY_CONFIG, multimedia) { DEFINES += ENABLE_VIDEO=1 mac:!contains(DEFINES, USE_QTMULTIMEDIA=1) { DEFINES += WTF_USE_QTKIT=1 } else: linux-*:!contains(DEFINES, USE_QTMULTIMEDIA=1) { DEFINES += WTF_USE_GSTREAMER=1 } else: contains(MOBILITY_CONFIG, multimedia) { DEFINES += WTF_USE_QT_MULTIMEDIA=1 } } }
Comment on attachment 98768 [details] Patch Since you are turning video on by default now, you should update http://trac.webkit.org/wiki/BuildingQtOnLinux with the new build dependencies.
Created attachment 101890 [details] Patch
Comment on attachment 101890 [details] Patch r- because it broke incremental build. And it killed the Qt EWS too. Check https://bugs.webkit.org/show_bug.cgi?id=38054 for details.
Comment on attachment 101890 [details] Patch r=me, but you need to find a way to land this without making our bot masters cry.
Committed r91752: <http://trac.webkit.org/changeset/91752>
Revision r91752 cherry-picked into qtwebkit-2.2 with commit 7a53b15 <http://gitorious.org/webkit/qtwebkit/commit/7a53b15>
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To change the default backend to use GStreamer on Linux and QuickTime on Mac, you would typically need to configure your multimedia framework or application accordingly. Here's a general approach: 1. **Identify the Multimedia Framework**: Determine which multimedia framework or library your application uses for audio and video playback. Common frameworks include GStreamer, QuickTime, VLC, and FFmpeg. 2. **Modify Configuration**: Depending on your application, you may be able to configure the default backend through settings or configuration files. Look for options related to multimedia playback and backend selection. 3. **For Linux (GStreamer)**: - If your application uses GStreamer as the default backend on Linux, you may not need to make any changes, as GStreamer is a common multimedia framework used on Linux systems. Ensure that GStreamer is installed on your Linux system and that your application is configured to use it. 4. **For Mac (QuickTime)**: - On macOS, QuickTime is often the default multimedia framework for applications that leverage system-provided multimedia playback capabilities. - If your application doesn't automatically use QuickTime on macOS, you may need to configure it explicitly to do so. This may involve modifying application settings or specifying QuickTime as the preferred backend in code or configuration files. 5. **Testing**: After making any necessary changes, thoroughly test your application on both Linux and macOS systems to ensure that the desired multimedia backend is being used correctly. 6. **Consider Platform-Specific Code**: If your application is cross-platform, you may need to include platform-specific code to handle backend selection based on the operating system. This could involve using conditional compilation or runtime checks to determine the appropriate backend to use. 7. **Documentation**: Ensure that your application's documentation clearly communicates the default backend behavior on different operating systems and provides any necessary instructions for users to configure or customize the backend selection. Remember to consider licensing, compatibility, and performance implications when choosing and configuring multimedia backends for your application. Additionally, keep in mind that user preferences and system configurations may vary, so providing flexibility and options for backend selection can enhance the user experience.
(In reply to Sookes04 from comment #19) > To change the default backend to use GStreamer on Linux and QuickTime on > Mac, you would typically need to configure your multimedia framework or > application accordingly. Here's a general approach: > > 1. **Identify the Multimedia Framework**: Determine which multimedia > framework or library your application uses for audio and video playback. > Common frameworks include GStreamer, QuickTime, VLC, and FFmpeg. > > 2. **Modify Configuration**: Depending on your application, you may be able > to configure the default backend through settings or configuration files. > Look for options related to multimedia playback and backend selection. > > 3. **For Linux (GStreamer)**: > - If your application uses GStreamer as the default backend on Linux, you > may not need to make any changes, as GStreamer is a common multimedia > framework used on Linux systems. Ensure that GStreamer is installed on your > Linux system and that your application is configured to use it. > > 4. **For Mac (QuickTime)**: > - On macOS, QuickTime is often the default multimedia framework for > applications that leverage system-provided multimedia playback capabilities. > - If your application doesn't automatically use QuickTime on macOS, you > may need to configure it explicitly to do so. This may involve modifying > application settings or specifying QuickTime as the preferred backend in > code or configuration files. > > 5. **Testing**: After making any necessary changes, thoroughly test your > application on both Linux and macOS systems to ensure that the desired > multimedia backend is being used correctly. > > 6. **Consider Platform-Specific Code**: If your application is > cross-platform, you may need to include platform-specific code to handle > backend selection based on the operating system. This could involve using > conditional compilation or runtime checks to determine the appropriate > backend to use. > > 7. **Documentation**: Ensure that your application's documentation clearly > communicates the default backend behavior on different operating systems and > provides any necessary instructions for users to configure or customize the > backend selection. > > Remember to consider licensing, compatibility, and performance implications > when choosing and configuring multimedia backends for your application. > Additionally, keep in mind that user preferences and system configurations > may vary, so providing flexibility and options for backend selection can > enhance the user experience.https://brevardcountypropertyappraiser.website/.
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To summarize, you want to change the default backend for Qt to use GStreamer on Linux and QuickTime on macOS. Here's how you can achieve this: 1. **Using GStreamer on Linux**: - First, ensure that GStreamer is installed on your Linux system. You can typically install it using your distribution's package manager. - In your Qt application, set the multimedia backend to GStreamer. You can do this by setting the environment variable `QT_MULTIMEDIA_PREFERRED_PLUGINS` to `gstreamer`. - You can set this environment variable before launching your Qt application using a script or by setting it in your development environment. 2. **Using QuickTime on macOS**: - By default, Qt on macOS uses the AVFoundation backend, which is the modern multimedia framework on macOS. However, if you specifically want to use QuickTime, you can override this behavior. - In your Qt application, set the multimedia backend to QuickTime. You can do this by setting the environment variable `QT_MULTIMEDIA_PREFERRED_PLUGINS` to `quicktime`. - As with Linux, you can set this environment variable before launching your Qt application. Here's a summary of the steps in code: ```bash # For Linux (GStreamer) export QT_MULTIMEDIA_PREFERRED_PLUGINS=gstreamer # For macOS (QuickTime) export QT_MULTIMEDIA_PREFERRED_PLUGINS=quicktime ``` Ensure that you set the appropriate environment variable based on the platform before launching your Qt application. This will instruct Qt to use the specified multimedia backend. Keep in mind that while GStreamer is widely used and well-supported on Linux, QuickTime may have limitations and compatibility issues on newer versions of macOS. Consider the specific requirements and compatibility of your application when choosing the multimedia backend.
(In reply to Clarence from comment #22) > To summarize, you want to change the default backend for Qt to use GStreamer > on Linux and QuickTime on macOS. Here's how you can achieve this: > > 1. **Using GStreamer on Linux**: > - First, ensure that GStreamer is installed on your Linux system. You can > typically install it using your distribution's package manager. > - In your Qt application, set the multimedia backend to GStreamer. You > can do this by setting the environment variable > `QT_MULTIMEDIA_PREFERRED_PLUGINS` to `gstreamer`. > - You can set this environment variable before launching your Qt > application using a script or by setting it in your development environment. > > 2. **Using QuickTime on macOS**: > - By default, Qt on macOS uses the AVFoundation backend, which is the > modern multimedia framework on macOS. However, if you specifically want to > use QuickTime, you can override this behavior. > - In your Qt application, set the multimedia backend to QuickTime. You > can do this by setting the environment variable > `QT_MULTIMEDIA_PREFERRED_PLUGINS` to `quicktime`. > - As with Linux, you can set this environment variable before launching > your Qt application. > > Here's a summary of the steps in code: > > ```bash > # For Linux (GStreamer) > export QT_MULTIMEDIA_PREFERRED_PLUGINS=gstreamer > > # For macOS (QuickTime) > export QT_MULTIMEDIA_PREFERRED_PLUGINS=quicktime > ``` > > Ensure that you set the appropriate environment variable based on the > platform before launching your Qt application. This will instruct Qt to use > the specified multimedia backend. > > Keep in mind that while GStreamer is widely used and well-supported on > Linux, QuickTime may have limitations and compatibility issues on newer > versions of macOS. Consider the specific requirements and compatibility of > your application when choosing the multimedia backend.https://mybalancenow.fun/.
It appears that you're referencing a bug report related to the WebKit project, specifically regarding changing the default backend to use GStreamer on Linux and QuickTime on Mac within the WebKit Qt component. The bug was reported in 2011 and has since been resolved. The resolution of the bug indicates that it has been fixed, but without additional context or access to the bug report itself, it's challenging to provide specific details about the fix or the current status. If you have any questions or need further information about the resolution of this bug or the WebKit project in general, you may want to consult the WebKit bug tracking system, relevant documentation, or reach out to the WebKit community for assistance.
(In reply to Corguive from comment #24) > It appears that you're referencing a bug report related to the WebKit > project, specifically regarding changing the default backend to use > GStreamer on Linux and QuickTime on Mac within the WebKit Qt component. The > bug was reported in 2011 and has since been resolved. > > The resolution of the bug indicates that it has been fixed, but without > additional context or access to the bug report itself, it's challenging to > provide specific details about the fix or the current status. > > If you have any questions or need further information about the resolution > of this bug or the WebKit project in general, you may want to consult the > WebKit bug tracking system, relevant documentation, or reach out to the > WebKit community for assistance. .https://tellthebell.fun/.
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