Hi , By default DShow will try to initialise in multithreaded mode, and should it fail, use the apartment threaded mode. One of the limitation of this is noted in r4951 (in dshow_dev.c, http://trac.pjsip.org/repos/changeset/4951): "When using apartment mode, Dshow object would not be accessible from other thread. hr = CoInitializeEx(NULL, COINIT_APARTMENTTHREADED); " So, app needs to do the initialisation in the same thread. Regards, Ming On Wed, Nov 12, 2014 at 11:26 PM, ????? ???????? <rota2000.1 at gmail.com> wrote: > I tried to make video call (with auto show and transmit) and have an > exception of read adress 0x00000000 in dshow_factory_create_stream function > on > dshow_stream_destroy((pjmedia_vid_dev_stream *)strm); > line. > > I started to debug and found out that in function create_filter_graph in > line > hr = CoCreateInstance(&CLSID_FilterGraph, NULL, CLSCTX_INPROC, > &IID_IFilterGraph, (LPVOID *)&graph->filter_graph); > we have hr = 0x800401F0 (need to run CoInitialize). So I add the followinf > after it > if (hr == 0x800401F0) > { > // retry > CoInitializeEx(NULL, COINIT_APARTMENTTHREADED); > hr = CoCreateInstance(&CLSID_FilterGraph, NULL, CLSCTX_INPROC, > &IID_IFilterGraph, (LPVOID *)&graph->filter_graph); > } > > And it started to work fine. > So I think that function dshow_factory_create_stream is called from other > thread, where was not CoInialized run. > > _______________________________________________ > Visit our blog: http://blog.pjsip.org > > pjsip mailing list > pjsip at lists.pjsip.org > http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org >
