Enumering capture devices?
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I am using the directshowsrc for capturing a camera source. If there
is only one camera it works out of the box without requiring me to specify a device-name. However when multiple cameras are connected then I need some way of enumerating the device names. Does GStreamer provide such a mechanism (similar to DirectShow's System Device Enumerator)? Grts, Francis ------------------------------------------------------------------------------ SOLARIS 10 is the OS for Data Centers - provides features such as DTrace, Predictive Self Healing and Award Winning ZFS. Get Solaris 10 NOW http://p.sf.net/sfu/solaris-dev2dev _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
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Hi,
Something like that: #include <gst/interfaces/propertyprobe.h> GstElement* videodevicesrc = create_element("dshowvideosrc", NULL); GstPropertyProbe* probe = GST_PROPERTY_PROBE (videodevicesrc); GValueArray* va = gst_property_probe_get_values_name (probe, "device-name"); for(guint i=0; i < va->n_values; ++i) { GValue* v = g_value_array_get_nth(va, i); g_print ("one more device: %s\n", g_value_get_string(v)); } gst_element_set_state (videodevicesrc, GST_STATE_NULL); gst_object_unref(GST_OBJECT (videodevicesrc)); 2010/2/10 Francis Rammeloo <[hidden email]> I am using the directshowsrc for capturing a camera source. If there ------------------------------------------------------------------------------ SOLARIS 10 is the OS for Data Centers - provides features such as DTrace, Predictive Self Healing and Award Winning ZFS. Get Solaris 10 NOW http://p.sf.net/sfu/solaris-dev2dev _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: Enumering capture devices?
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That seems to work well. Thanks :)
2010/2/11 Julien Isorce <[hidden email]>: > Hi, > > > Something like that: > > #include <gst/interfaces/propertyprobe.h> > > GstElement* videodevicesrc = create_element("dshowvideosrc", NULL); > GstPropertyProbe* probe = GST_PROPERTY_PROBE (videodevicesrc); > GValueArray* va = gst_property_probe_get_values_name (probe, "device-name"); > for(guint i=0; i < va->n_values; ++i) { > GValue* v = g_value_array_get_nth(va, i); > g_print ("one more device: %s\n", g_value_get_string(v)); > } > gst_element_set_state (videodevicesrc, GST_STATE_NULL); > gst_object_unref(GST_OBJECT (videodevicesrc)); > > > 2010/2/10 Francis Rammeloo <[hidden email]> >> >> I am using the directshowsrc for capturing a camera source. If there >> is only one camera it works out of the box without requiring me to >> specify a device-name. However when multiple cameras are connected >> then I need some way of enumerating the device names. Does GStreamer >> provide such a mechanism (similar to DirectShow's System Device >> Enumerator)? >> >> >> Grts, >> Francis >> >> >> ------------------------------------------------------------------------------ >> SOLARIS 10 is the OS for Data Centers - provides features such as DTrace, >> Predictive Self Healing and Award Winning ZFS. Get Solaris 10 NOW >> http://p.sf.net/sfu/solaris-dev2dev >> _______________________________________________ >> gstreamer-devel mailing list >> [hidden email] >> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel > > > ------------------------------------------------------------------------------ > SOLARIS 10 is the OS for Data Centers - provides features such as DTrace, > Predictive Self Healing and Award Winning ZFS. Get Solaris 10 NOW > http://p.sf.net/sfu/solaris-dev2dev > _______________________________________________ > gstreamer-devel mailing list > [hidden email] > https://lists.sourceforge.net/lists/listinfo/gstreamer-devel > > ------------------------------------------------------------------------------ SOLARIS 10 is the OS for Data Centers - provides features such as DTrace, Predictive Self Healing and Award Winning ZFS. Get Solaris 10 NOW http://p.sf.net/sfu/solaris-dev2dev _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: Enumering capture devices?
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Hi,
I also tried the same code but getting some linking errors. I have linked with the following libraries: libgio-2.0, libglib-2.0, libgmodule-2.0, libgobject-2.0, libgstbase-0.10, libgstcontroller-0.10 and libgstreamer-0.10. What I am missing? Thanks in advance for your help. The error logs is as below:
video_stream.obj : error LNK2019: unresolved external symbol _gst_property_probe_get_values_name referenced in function "void __cdecl chek_vid_dev(void)" (?chek_vid_dev@@YAXXZ) video_stream.obj : error LNK2019: unresolved external symbol _gst_property_probe_get_type referenced in function "void __cdecl chek_vid_dev(void)" ([hidden email])
Regards,
Sumit
On Fri, Feb 12, 2010 at 4:39 AM, Francis Rammeloo <[hidden email]> wrote: That seems to work well. Thanks :) ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: Enumering capture devices?
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I think you also need to link with libgstinterfaces-0.10.
Grts, Francis 2010/2/22 sumit kumar <[hidden email]>: > Hi, > I also tried the same code but getting some linking errors. I have linked > with the following libraries: libgio-2.0, libglib-2.0, libgmodule-2.0, > libgobject-2.0, libgstbase-0.10, libgstcontroller-0.10 and > libgstreamer-0.10. What I am missing? Thanks in advance for your help. The > error logs is as below: > > > video_stream.obj : error LNK2019: unresolved external symbol > _gst_property_probe_get_values_name referenced in function "void __cdecl > chek_vid_dev(void)" (?chek_vid_dev@@YAXXZ) > > video_stream.obj : error LNK2019: unresolved external symbol > _gst_property_probe_get_type referenced in function "void __cdecl > chek_vid_dev(void)" (?chek_vid_dev@@YAXXZ) > > > > Regards, > Sumit > > On Fri, Feb 12, 2010 at 4:39 AM, Francis Rammeloo > <[hidden email]> wrote: >> >> That seems to work well. Thanks :) >> >> 2010/2/11 Julien Isorce <[hidden email]>: >> > Hi, >> > >> > >> > Something like that: >> > >> > #include <gst/interfaces/propertyprobe.h> >> > >> > GstElement* videodevicesrc = create_element("dshowvideosrc", NULL); >> > GstPropertyProbe* probe = GST_PROPERTY_PROBE (videodevicesrc); >> > GValueArray* va = gst_property_probe_get_values_name (probe, >> > "device-name"); >> > for(guint i=0; i < va->n_values; ++i) { >> > GValue* v = g_value_array_get_nth(va, i); >> > g_print ("one more device: %s\n", g_value_get_string(v)); >> > } >> > gst_element_set_state (videodevicesrc, GST_STATE_NULL); >> > gst_object_unref(GST_OBJECT (videodevicesrc)); >> > >> > >> > 2010/2/10 Francis Rammeloo <[hidden email]> >> >> >> >> I am using the directshowsrc for capturing a camera source. If there >> >> is only one camera it works out of the box without requiring me to >> >> specify a device-name. However when multiple cameras are connected >> >> then I need some way of enumerating the device names. Does GStreamer >> >> provide such a mechanism (similar to DirectShow's System Device >> >> Enumerator)? >> >> >> >> >> >> Grts, >> >> Francis >> >> >> >> >> >> >> >> ------------------------------------------------------------------------------ >> >> SOLARIS 10 is the OS for Data Centers - provides features such as >> >> DTrace, >> >> Predictive Self Healing and Award Winning ZFS. Get Solaris 10 NOW >> >> http://p.sf.net/sfu/solaris-dev2dev >> >> _______________________________________________ >> >> gstreamer-devel mailing list >> >> [hidden email] >> >> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel >> > >> > >> > >> > ------------------------------------------------------------------------------ >> > SOLARIS 10 is the OS for Data Centers - provides features such as >> > DTrace, >> > Predictive Self Healing and Award Winning ZFS. Get Solaris 10 NOW >> > http://p.sf.net/sfu/solaris-dev2dev >> > _______________________________________________ >> > gstreamer-devel mailing list >> > [hidden email] >> > https://lists.sourceforge.net/lists/listinfo/gstreamer-devel >> > >> > >> >> >> ------------------------------------------------------------------------------ >> SOLARIS 10 is the OS for Data Centers - provides features such as DTrace, >> Predictive Self Healing and Award Winning ZFS. Get Solaris 10 NOW >> http://p.sf.net/sfu/solaris-dev2dev >> _______________________________________________ >> gstreamer-devel mailing list >> [hidden email] >> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel > > > ------------------------------------------------------------------------------ > Download Intel® Parallel Studio Eval > Try the new software tools for yourself. Speed compiling, find bugs > proactively, and fine-tune applications for parallel performance. > See why Intel Parallel Studio got high marks during beta. > http://p.sf.net/sfu/intel-sw-dev > _______________________________________________ > gstreamer-devel mailing list > [hidden email] > https://lists.sourceforge.net/lists/listinfo/gstreamer-devel > > ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
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