<div dir="ltr">Since you are switching from mingw to msvc ... watch out for weird issues with the plugin cache.<div> </div><div><a href="http://gstreamer-devel.966125.n4.nabble.com/msvc-build-can-t-find-elements-in-playback-plugin-td4691649.html">http://gstreamer-devel.966125.n4.nabble.com/msvc-build-can-t-find-elements-in-playback-plugin-td4691649.html</a></div></div> <div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Mar 30, 2020 at 10:27 AM Daniel Sperka <<a href="mailto:djsperka@ucdavis.edu">djsperka@ucdavis.edu</a>> wrote: </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">I made an attempt at migrating my build on windows to MINGW, but gave up for reasons I cannot remember. <div> </div><div>I've wrestled with it, but have stuck with MSVC in my Qt+gstreamer application. One issue I ran into that sounds similar to what yours is had to do with the scanner running at startup. It searches a hard-coded path, but if I use an embedded gstreamer lib I had to set some env variables. Here is a portion of my code - the usage is a bit messy and intertwined with other stuff. </div><div> </div><div>In my app, I distribute gstreamer libs with the application using the *.msm modules. The directory structure is slightly different on mac/windows. (I chose not to require a full gstreamer installation when installing my application). I had various issues until I got these env vars sorted out - my code defines these env vars relative to the location of the exe file, and the msm files are installed in a subfolder of the file the exe is in. </div><div> </div><div>I distribute a plugin for drawing on a Qt widget (pulled it out of old Qt-Gstreamer dist). I put that plugin into the GST_PLUGIN_SYSTEM_PATH folder with the official ones rather than create another folder for my plugins, so I do not define GST_PLUGIN_PATH here. </div><div> </div><div> </div><div>Dan</div><div> </div><div> </div><div> </div><div> // Initialize gstreamer // Debug builds (HABIT_DEBUG) use system-defined gstreamer libs. // Release builds (HABIT_RELEASE) _can_ use the system-installed (whatever we link against) gstreamer libs, // but the -n flag tells us to run as NOT installed. // // When running "installed", we assume that the gstreamer framework is embedded in the bundle, and we set two // env variables to point that direction: // GST_PLUGIN_SYSTEM_PATH - where gstreamer finds plugins. Note that I stick the gst-qt plugin there. // GIO_EXTRA_MODULES - some glib thing // GST_PLUGIN_SCANNER - scanner checks local plugin cache?? if (bNotInstalled) { qDebug() << "Run as NOT installed, exe file is " << argv[0]; } else { qDebug() << "Run installed, exe file is " << argv[0]; //#ifdef HABIT_RELEASE qDebug() << "exePath " << QCoreApplication::applicationDirPath(); QDir dirScanner(QCoreApplication::applicationDirPath()); QString sRelPathToScanner; QString sRelPathToSystemPlugins; QString sRelPathToGioModules;#if defined(Q_OS_MAC) sRelPathToScanner = "../Frameworks/GStreamer.framework/Versions/1.0/libexec/gstreamer-1.0"; sRelPathToSystemPlugins = "../Frameworks/GStreamer.framework/Versions/1.0/lib/gstreamer-1.0"; sRelPathToGioModules = "../Frameworks/GStreamer.framework/Versions/1.0/lib/gio/modules";#else sRelPathToScanner = "gstreamer-1.0/libexec/gstreamer-1.0"; sRelPathToSystemPlugins = "gstreamer-1.0/lib/gstreamer-1.0"; sRelPathToGioModules = "gstreamer-1.0/lib/gio/modules";#endif if (dirScanner.cd(sRelPathToScanner)) { qDebug() << "Set GST_PLUGIN_SCANNER=" << dirScanner.filePath("gst-plugin-scanner"); qputenv("GST_PLUGIN_SCANNER", dirScanner.filePath("gst-plugin-scanner").toLocal8Bit()); } else { qCritical() << "Cannot navigate to relative scanner path " << sRelPathToScanner << " from exePath "; } QDir dirPlugins(QCoreApplication::applicationDirPath()); if (dirPlugins.cd(sRelPathToSystemPlugins)) { qDebug() << "Set GST_PLUGIN_SYSTEM_PATH=" << dirPlugins.path(); qputenv("GST_PLUGIN_SYSTEM_PATH", dirPlugins.path().toLocal8Bit()); } else { qCritical() << "Cannot navigate to relative system plugin path " << sRelPathToSystemPlugins; } QDir dirGio(QCoreApplication::applicationDirPath()); if (dirGio.cd(sRelPathToGioModules)) { qDebug() << "Set GIO_EXTRA_MODULES=" << dirGio.path(); qputenv("GIO_EXTRA_MODULES", dirGio.path().toLocal8Bit()); } else { qCritical() << "Cannot navigate to relative gio module folder " << sRelPathToGioModules; } #ifdef Q_OS_WIN QString sRelPathToHabitPlugins("gstreamer-plugins"); QDir dirHabitPlugins(QCoreApplication::applicationDirPath()); if (dirHabitPlugins.cd(sRelPathToHabitPlugins)) { qDebug() << "Set GST_PLUGIN_PATH=" << dirHabitPlugins.path(); qputenv("GST_PLUGIN_PATH", dirHabitPlugins.path().toLocal8Bit()); } else { qCritical() << "Cannot navigate to relative Habit plugin path " << sRelPathToHabitPlugins; }#endif } // Initialize gstreamer qDebug() << "Initialize gstreamer..."; gst_init(&argc, &argv); qDebug() << "Initialize gstreamer...Done.";</div></div> <div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Mar 30, 2020 at 9:28 AM David Ing <<a href="mailto:ding@panopto.com" target="_blank">ding@panopto.com</a>> wrote: </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">FWIW -- The mingw binaries are built with a very old toolchain: <a href="https://gitlab.freedesktop.org/gstreamer/cerbero/-/blob/1.16/recipes/toolchain/mingw-w64.recipe#L3" target="_blank">https://gitlab.freedesktop.org/gstreamer/cerbero/-/blob/1.16/recipes/toolchain/mingw-w64.recipe#L3</a></div> <div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Mar 30, 2020 at 8:59 AM erikherz <<a href="mailto:erik@vivoh.com" target="_blank">erik@vivoh.com</a>> wrote: </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">David, I will try out this code too ... assuming that simply putting all of the plugins in the same directory is not sufficient. Thank you! Erik -- Sent from: <a href="http://gstreamer-devel.966125.n4.nabble.com/" rel="noreferrer" target="_blank">http://gstreamer-devel.966125.n4.nabble.com/</a> _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.freedesktop.org" target="_blank">gstreamer-devel@lists.freedesktop.org</a> <a href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" rel="noreferrer" target="_blank">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> </blockquote></div> _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.freedesktop.org" target="_blank">gstreamer-devel@lists.freedesktop.org</a> <a href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" rel="noreferrer" target="_blank">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> </blockquote></div> <div> </div>-- <div dir="ltr">Daniel J. Sperka, Ph. D. UC Davis Center for Neuroscience </div> _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.freedesktop.org" target="_blank">gstreamer-devel@lists.freedesktop.org</a> <a href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" rel="noreferrer" target="_blank">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> </blockquote></div>