GStreamer on Qt for iOS
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GStreamer on Qt for iOS
 
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Re: GStreamer on Qt for iOS
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On 13/5/21 7:18 pm, Luis via gstreamer-devel wrote:
> I'm trying to develop an iOS application (iPad should be the main target) for > controlling a device (Linux embedded) connected to the same network. > > Basically it is a remote desktop application. > > The application must be multi-platform, so it has be built within a > multi-platform framework. This requirement is fulfilled by developing the > app with **Qt** and **Qt Creator**. > > The application should play a stream video stream transmitted over the > network from the Linux device. I use **GStreamer** for that. I already > downloaded and succesfully installed the iOS package from the official site > (https://gstreamer.freedesktop.org/documentation/installing/for-ios-development.html?gi-language=c.). > > Now, I have some trouble linking the GStreamer framework in the .pro file. > > In desktop environments (Windows, Linux and macOS) all I need to do is to > use pkg-config > > ``` > mac { > QT_CONFIG -= no-pkg-config > PKG_CONFIG = /usr/local/bin/pkg-config > } > > CONFIG += link_pkgconfig > PKGCONFIG += gstreamer-1.0 > PKGCONFIG += gstreamer-pbutils-1.0 > ``` > and it works just fine. In iOS I don't have pkg-config (afik), so I manually > added the framework: > > ``` > LIBS += -F$$PWD/../../Library/Developer/GStreamer/iPhone.sdk/ -framework > GStreamer > > INCLUDEPATH += > $$PWD/../../Library/Developer/GStreamer/iPhone.sdk/GStreamer.framework/Versions/1.0/Headers > DEPENDPATH += > $$PWD/../../Library/Developer/GStreamer/iPhone.sdk/GStreamer.framework/Versions/1.0/Headers > ``` > When I try to build, it gives me this error: > > ``` > GStreamer(libglib-2_0_a-gconvert.c.o):-1: error: Undefined symbols for > architecture x86_64: > "___darwin_check_fd_set_overflow", referenced from: > _gst_poll_wait in GStreamer(libgstreamer-1_0_a-gstpoll.c.o) > "_iconv_close", referenced from: > _g_convert in GStreamer(libglib-2_0_a-gconvert.c.o) > _g_convert_with_fallback in GStreamer(libglib-2_0_a-gconvert.c.o) > (maybe you meant: _g_iconv_close) > "_iconv", referenced from: > _g_convert_with_iconv in GStreamer(libglib-2_0_a-gconvert.c.o) > _g_convert_with_fallback in GStreamer(libglib-2_0_a-gconvert.c.o) > (maybe you meant: _g_iconv_close, _g_iconv , _g_iconv_open , > _g_convert_with_iconv ) > "_iconv_open", referenced from: > _try_conversion in GStreamer(libglib-2_0_a-gconvert.c.o) > (maybe you meant: _g_iconv_open) > > ``` > Tried to link the apparently missing liconv, but no luck. > > ``` > macx: LIBS += > -L$$PWD/../../../../Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/usr/lib/ > -liconv > > INCLUDEPATH += > $$PWD/../../../../Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/usr > DEPENDPATH += > $$PWD/../../../../Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/usr > > ``` > > I'm aware of the existence of a similar question on nabble.com > (http://gstreamer-devel.966125.n4.nabble.com/Gstreamer-on-Qt-iOS-td4676773.html) > but I still couldn't figure out the problem. files instead of providing .dylibs directly so you may need to find that instead of the dylib. The answer is still the same though, you need to figure out how to link to the libiconv provided by the iOS SDK (or figure out if Qt also ships/uses it's own version of iconv and use that). Your iOS SDK path looks wrong though and should be something of the form: '/Applications/Xcode.app/Contents/Developer/Platforms/$PLATFORM.platform/Developer/SDKs/$PLATFORM$MAJOR.$MINOR.sdk' going off https://gitlab.freedesktop.org/gstreamer/cerbero/-/blob/master/config/ios.config#L40 <https://gitlab.freedesktop.org/gstreamer/cerbero/-/blob/master/config/ios.config#L40>. Cheers -Matt > Any thoughts? > Thanks > > **Additional info** > > * The application must be multi-platform, so it must be built in Qt Creator. > It already works on Windows, Linux and macOS. > * developing machine macOS 11.3.1 > * Xcode version 11.2.1 > * Qt version 5.15.2 > > > > > > -- > Sent from: http://gstreamer-devel.966125.n4.nabble.com/ > _______________________________________________ > gstreamer-devel mailing list > [hidden email] > https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
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Re: GStreamer on Qt for iOS
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Re: GStreamer on Qt for iOS
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Are you missing
https://gitlab.freedesktop.org/gstreamer/gst-examples/-/blob/master/playback/player/ios/GstPlay/gst_ios_init.m <https://gitlab.freedesktop.org/gstreamer/gst-examples/-/blob/master/playback/player/ios/GstPlay/gst_ios_init.m> and the corresponding .h file? Everything is linked in statically on iOS and you need to manually declare and register each GStreamer plugin you want to use. Cheers -Matt On 18/5/21 7:04 pm, Luis via gstreamer-devel wrote: > Thanks for the hint. > > I've made smoe progress. > > So far I've managed to correctly link the library and successfully run the > project in the Simulator, but when I try to create GStreamer elements it > *fails* at runtime. > > Here it is my .pro > > #iOS > INCLUDEPATH += > /Users/user/Library/Developer/GStreamer/iPhone.sdk/GStreamer.framework/Headers > LIBS += -F /Users/user/Library/Developer/GStreamer/iPhone.sdk -framework > GStreamer > > LIBS += > -L/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/usr/lib > -liconv > > QMAKE_IOS_DEPLOYMENT_TARGET = 12.0 > > # Universal target (iPhone and iPad) > QMAKE_APPLE_TARGETED_DEVICE_FAMILY = 1,2 > > QMAKE_APPLE_DEVICE_ARCHS = arm64 > QMAKE_APPLE_SIMULATOR_ARCHS = x86_64 > > > > And here it is where the application fails: > > data.pipeline = gst_pipeline_new ("pipeline"); > qDebug() << "pipeline" << data.pipeline; > > data.udpsrc = gst_element_factory_make("udpsrc", NULL); > data.rtph264depay = gst_element_factory_make("rtph264depay", NULL); > data.avdec_h264 = gst_element_factory_make("avdec_h264", NULL); > data.videoconvert = gst_element_factory_make("videoconvert", NULL); > data.videoflip = gst_element_factory_make ("videoflip", NULL); > > qDebug() << "udpsrc" << data.udpsrc; > qDebug() << "rtph264depay" << data.rtph264depay; > qDebug() << "avdec_h264" << data.avdec_h264; > qDebug() << "videoconvert" << data.videoconvert; > qDebug() << "videoflip" << data.videoflip; > > > > *All the calls to gst_element_factory_make return null.* > > Additional Info > > Qt 5.15.2 > Xcode 12.5 > Develop on Big Sur > > Any ideas? > > Thanks > > > > > > > -- > Sent from: http://gstreamer-devel.966125.n4.nabble.com/ > _______________________________________________ > gstreamer-devel mailing list > [hidden email] > https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
Re: GStreamer on Qt for iOS
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Re: GStreamer on Qt for iOS
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If you google any of those functions, you'll find that _res_9_* is in
libresolve.dylib. Add that to your build definitions. find, nm and grep are your friends here. Cheers -Matt On 20/5/21 10:11 pm, Luis via gstreamer-devel wrote: > Yes, I did that, but there were several errors, so I tryed to manually > declare and register the plugins. > > This works fine: > > // Declar plugins > G_BEGIN_DECLS > GST_PLUGIN_STATIC_DECLARE(coreelements); > GST_PLUGIN_STATIC_DECLARE(videotestsrc); > GST_PLUGIN_STATIC_DECLARE(videoconvert); > GST_PLUGIN_STATIC_DECLARE(playback); > GST_PLUGIN_STATIC_DECLARE(x264); > GST_PLUGIN_STATIC_DECLARE(libav); > GST_PLUGIN_STATIC_DECLARE(encoding); > //... > G_END_DECLS > > int main(int argc, char *argv[]) { > > // Initialize the GStreamer library > if (gst_init_check(&argc, &argv, NULL)) { > qDebug() << "This program is linked against" << > gst_version_string(); > } > > // Register plugins > GST_PLUGIN_STATIC_REGISTER(coreelements); > GST_PLUGIN_STATIC_REGISTER(videotestsrc); > GST_PLUGIN_STATIC_REGISTER(videoconvert); > GST_PLUGIN_STATIC_REGISTER(playback); > GST_PLUGIN_STATIC_REGISTER(x264); > GST_PLUGIN_STATIC_REGISTER(libav); > GST_PLUGIN_STATIC_REGISTER(encoding); > //... > } > > But if I try to register the others plugins, for example by adding > > GST_PLUGIN_STATIC_DECLARE(udp); > > and > > GST_PLUGIN_STATIC_REGISTER(udp); > > it gives me this error: > > GStreamer(libgio-2_0_a-gresolver.c.o):-1: error: Undefined symbols for > architecture x86_64: > "_res_9_dn_expand", referenced from: > _do_lookup_records in GStreamer(libgio-2_0_a-gthreadedresolver.c.o) > "_res_9_ninit", referenced from: > _do_lookup_records in GStreamer(libgio-2_0_a-gthreadedresolver.c.o) > "_res_9_nquery", referenced from: > _do_lookup_records in GStreamer(libgio-2_0_a-gthreadedresolver.c.o) > "_res_9_ndestroy", referenced from: > _do_lookup_records in GStreamer(libgio-2_0_a-gthreadedresolver.c.o) > "_res_9_init", referenced from: > _g_resolver_maybe_reload in GStreamer(libgio-2_0_a-gresolver.c.o) > > I tried to use directly gst_ios_init.m and gst_ios_init.h, but it seems > missing some pieces. I needed to add > > #include <UIKit/UIKit.h> > #include <Foundation/Foundation.h> > > so I suspect that some include/import is missing somewhere > > Specifically it seems missing the lgio-2.0 library. > > Same thread in the Qt Forum: > https://forum.qt.io/topic/126746/gstreamer-on-ios/5 > > > > Any hint? > > Thanks Matt > > > > > > > -- > Sent from: http://gstreamer-devel.966125.n4.nabble.com/ > _______________________________________________ > gstreamer-devel mailing list > [hidden email] > https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
Re: GStreamer on Qt for iOS
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Also, you may be missing some core frameworks, like Foundation or
CoreGraphics, or UIKit. See https://gitlab.freedesktop.org/gstreamer/gst-examples/-/blob/master/playback/player/ios/GstPlay.xcodeproj/project.pbxproj#L9 <https://gitlab.freedesktop.org/gstreamer/gst-examples/-/blob/master/playback/player/ios/GstPlay.xcodeproj/project.pbxproj#L9> for a tentative list. Cheers -Matt On 21/5/21 11:22 am, Matthew Waters wrote: > If you google any of those functions, you'll find that _res_9_* is in > libresolve.dylib. Add that to your build definitions. > > find, nm and grep are your friends here. > > Cheers > -Matt > > On 20/5/21 10:11 pm, Luis via gstreamer-devel wrote: >> Yes, I did that, but there were several errors, so I tryed to manually >> declare and register the plugins. >> >> This works fine: >> >> // Declar plugins >> G_BEGIN_DECLS >> GST_PLUGIN_STATIC_DECLARE(coreelements); >> GST_PLUGIN_STATIC_DECLARE(videotestsrc); >> GST_PLUGIN_STATIC_DECLARE(videoconvert); >> GST_PLUGIN_STATIC_DECLARE(playback); >> GST_PLUGIN_STATIC_DECLARE(x264); >> GST_PLUGIN_STATIC_DECLARE(libav); >> GST_PLUGIN_STATIC_DECLARE(encoding); >> //... >> G_END_DECLS >> >> int main(int argc, char *argv[]) { >> >> // Initialize the GStreamer library >> if (gst_init_check(&argc, &argv, NULL)) { >> qDebug() << "This program is linked against" << >> gst_version_string(); >> } >> >> // Register plugins >> GST_PLUGIN_STATIC_REGISTER(coreelements); >> GST_PLUGIN_STATIC_REGISTER(videotestsrc); >> GST_PLUGIN_STATIC_REGISTER(videoconvert); >> GST_PLUGIN_STATIC_REGISTER(playback); >> GST_PLUGIN_STATIC_REGISTER(x264); >> GST_PLUGIN_STATIC_REGISTER(libav); >> GST_PLUGIN_STATIC_REGISTER(encoding); >> //... >> } >> >> But if I try to register the others plugins, for example by adding >> >> GST_PLUGIN_STATIC_DECLARE(udp); >> >> and >> >> GST_PLUGIN_STATIC_REGISTER(udp); >> >> it gives me this error: >> >> GStreamer(libgio-2_0_a-gresolver.c.o):-1: error: Undefined symbols for >> architecture x86_64: >> "_res_9_dn_expand", referenced from: >> _do_lookup_records in >> GStreamer(libgio-2_0_a-gthreadedresolver.c.o) >> "_res_9_ninit", referenced from: >> _do_lookup_records in >> GStreamer(libgio-2_0_a-gthreadedresolver.c.o) >> "_res_9_nquery", referenced from: >> _do_lookup_records in >> GStreamer(libgio-2_0_a-gthreadedresolver.c.o) >> "_res_9_ndestroy", referenced from: >> _do_lookup_records in >> GStreamer(libgio-2_0_a-gthreadedresolver.c.o) >> "_res_9_init", referenced from: >> _g_resolver_maybe_reload in GStreamer(libgio-2_0_a-gresolver.c.o) >> >> I tried to use directly gst_ios_init.m and gst_ios_init.h, but it seems >> missing some pieces. I needed to add >> >> #include <UIKit/UIKit.h> >> #include <Foundation/Foundation.h> >> >> so I suspect that some include/import is missing somewhere >> >> Specifically it seems missing the lgio-2.0 library. >> >> Same thread in the Qt Forum: >> https://forum.qt.io/topic/126746/gstreamer-on-ios/5 >> >> >> >> Any hint? >> >> Thanks Matt >> >> >> >> >> >> >> -- >> Sent from: http://gstreamer-devel.966125.n4.nabble.com/ >> _______________________________________________ >> gstreamer-devel mailing list >> [hidden email] >> https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel > > _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
Re: GStreamer on Qt for iOS
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Re: GStreamer on Qt for iOS
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Re: GStreamer on Qt for iOS
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