<div dir="ltr"><div>>> I derived originally from tutorial-3 that I used some concepts from </div><div><span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">>> sdlshare.c and sdlshare2.c for the fakesink and context sharing.</div><div><span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"> </div><div><span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">Hi, all these 3 examples are working for you ? What is the diff with your sample ?</div><div> </div><div><span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"> </div><div><span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"> </div></div><div class="gmail_extra"> <div class="gmail_quote">On 21 February 2018 at 09:09, jeremi.wojcicki <<a href="mailto:jeremi.wojcicki@gmail.com" target="_blank">jeremi.wojcicki@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Nicolas Dufresne-5 wrote > Le mardi 20 février 2018 à 12:16 -0700, jeremi.wojcicki a écrit : >> To sum up, it seems that the lack of need-context message in bus sync >> callback is the problem now. Any reason for that? > > Have you compared your code against one of the tutorial ? Hmm, I derived originally from tutorial-3 that I used some concepts from sdlshare.c and sdlshare2.c for the fakesink and context sharing. Anyhow, here is the current version of the code: <a href="https://hastebin.com/onoyirarof.php" rel="noreferrer" target="_blank">https://hastebin.com/onoyirarof.php</a> and as you can see the need-context message appears in the async handler (I hope I am naming them right, but that's what I understood fro the GstBus documentation). 2-21 10:00:26.546 19263-19331/com.oculus.vrcubeworldsv E/GST_log: Recieved context[0x718BE080] and display[0x00000001] from renderer 02-21 10:00:26.565 19263-19377/com.oculus.vrcubeworldsv I/GST_log: Starting gstreamer pipeline 02-21 10:00:26.565 19263-19377/com.oculus.vrcubeworldsv I/GST_log: Creating pipeline in CustomData at 0x735d084420 02-21 10:00:26.565 19263-19377/com.oculus.vrcubeworldsv I/GST_log: Creating new main loop 02-21 10:00:26.565 19263-19377/com.oculus.vrcubeworldsv I/GST_log: Building pipeline 02-21 10:00:26.569 19263-19377/com.oculus.vrcubeworldsv I/GST_log: glupload display ok 02-21 10:00:26.569 19263-19377/com.oculus.vrcubeworldsv I/GST_log: glupload wrapped context ok 02-21 10:00:26.574 19263-19377/com.oculus.vrcubeworldsv I/GST_log: > sync handler called 02-21 10:00:26.574 19263-19377/com.oculus.vrcubeworldsv I/GST_log: > Got state-changed message 02-21 10:00:26.574 19263-19377/com.oculus.vrcubeworldsv I/GST_log: > sync handler called 02-21 10:00:26.574 19263-19377/com.oculus.vrcubeworldsv I/GST_log: > Got state-changed message 02-21 10:00:26.574 19263-19377/com.oculus.vrcubeworldsv I/GST_log: > sync handler called 02-21 10:00:26.574 19263-19377/com.oculus.vrcubeworldsv I/GST_log: > Got stream-status message 02-21 10:00:26.574 19263-19377/com.oculus.vrcubeworldsv I/GST_log: > sync handler called 02-21 10:00:26.574 19263-19377/com.oculus.vrcubeworldsv I/GST_log: > Got state-changed message 02-21 10:00:26.574 19263-19385/com.oculus.vrcubeworldsv I/GST_log: > sync handler called 02-21 10:00:26.574 19263-19385/com.oculus.vrcubeworldsv I/GST_log: > Got stream-status message 02-21 10:00:26.575 19263-19385/com.oculus.vrcubeworldsv I/GST_log: > sync handler called 02-21 10:00:26.575 19263-19385/com.oculus.vrcubeworldsv I/GST_log: > Got stream-start message 02-21 10:00:26.630 19263-19385/com.oculus.vrcubeworldsv I/GST_log: > sync handler called 02-21 10:00:26.630 19263-19385/com.oculus.vrcubeworldsv I/GST_log: > Got state-changed message 02-21 10:00:26.630 19263-19385/com.oculus.vrcubeworldsv I/GST_log: > sync handler called 02-21 10:00:26.630 19263-19385/com.oculus.vrcubeworldsv I/GST_log: > Got state-changed message 02-21 10:00:26.630 19263-19385/com.oculus.vrcubeworldsv I/GST_log: > sync handler called 02-21 10:00:26.630 19263-19385/com.oculus.vrcubeworldsv I/GST_log: > Got async-done message 02-21 10:00:26.630 19263-19377/com.oculus.vrcubeworldsv I/GST_log: Entering main loop... (CustomData:0x735d084420) 02-21 10:00:26.630 19263-19377/com.oculus.vrcubeworldsv I/GST_log: Semaphore post 02-21 10:00:26.631 19263-19377/com.oculus.vrcubeworldsv I/GST_log: > sync handler called 02-21 10:00:26.631 19263-19377/com.oculus.vrcubeworldsv I/GST_log: > Got new-clock message 02-21 10:00:26.631 19263-19385/com.oculus.vrcubeworldsv I/GST_log: Got a buffer at fakesink 02-21 10:00:26.631 19263-19377/com.oculus.vrcubeworldsv I/GST_log: > sync handler called 02-21 10:00:26.631 19263-19377/com.oculus.vrcubeworldsv I/GST_log: > Got state-changed message 02-21 10:00:26.631 19263-19377/com.oculus.vrcubeworldsv I/GST_log: > sync handler called 02-21 10:00:26.631 19263-19377/com.oculus.vrcubeworldsv I/GST_log: > Got state-changed message 02-21 10:00:26.631 19263-19377/com.oculus.vrcubeworldsv I/GST_log: > sync handler called 02-21 10:00:26.631 19263-19377/com.oculus.vrcubeworldsv I/GST_log: > Got state-changed message 02-21 10:00:26.631 19263-19377/com.oculus.vrcubeworldsv I/GST_log: > sync handler called 02-21 10:00:26.631 19263-19377/com.oculus.vrcubeworldsv I/GST_log: > Got state-changed message 02-21 10:00:26.631 19263-19377/com.oculus.vrcubeworldsv I/GST_log: > sync handler called 02-21 10:00:26.631 19263-19377/com.oculus.vrcubeworldsv I/GST_log: > Got state-changed message 02-21 10:00:26.631 19263-19377/com.oculus.vrcubeworldsv I/GST_log: Playing... 02-21 10:00:26.631 19263-19377/com.oculus.vrcubeworldsv I/GST_log: > async handler called 02-21 10:00:26.631 19263-19377/com.oculus.vrcubeworldsv I/GST_log: > Got state-changed message 02-21 10:00:26.632 19263-19377/com.oculus.vrcubeworldsv I/GST_log: > async handler called 02-21 10:00:26.632 19263-19377/com.oculus.vrcubeworldsv I/GST_log: > Got need-context message 02-21 10:00:26.632 19263-19377/com.oculus.vrcubeworldsv I/GST_log: Element gluploadelement0 asks for context. We give => 0x718be080 0x00000001 02-21 10:00:26.632 19263-19377/com.oculus.vrcubeworldsv I/GST_log: got need context gst.gl.GLDisplay 02-21 10:00:26.632 19263-19377/com.oculus.vrcubeworldsv I/GST_log: > async handler called 02-21 10:00:26.632 19263-19377/com.oculus.vrcubeworldsv I/GST_log: > Got have-context message 02-21 10:00:26.632 19263-19377/com.oculus.vrcubeworldsv I/GST_log: Received 'got context' message 02-21 10:00:26.632 19263-19377/com.oculus.vrcubeworldsv I/GST_log: > async handler called 02-21 10:00:26.632 19263-19377/com.oculus.vrcubeworldsv I/GST_log: > Got need-context message 02-21 10:00:26.632 19263-19377/com.oculus.vrcubeworldsv I/GST_log: Element gluploadelement0 asks for context. We give => 0x718be080 0x00000001 02-21 10:00:26.632 19263-19377/com.oculus.vrcubeworldsv I/GST_log: got need context gst.gl.app_context 02-21 10:00:26.632 19263-19377/com.oculus.vrcubeworldsv I/GST_log: > async handler called 02-21 10:00:26.632 19263-19377/com.oculus.vrcubeworldsv I/GST_log: > Got state-changed message 02-21 10:00:26.632 19263-19377/com.oculus.vrcubeworldsv I/GST_log: > async handler called 02-21 10:00:26.632 19263-19377/com.oculus.vrcubeworldsv I/GST_log: > Got state-changed message 02-21 10:00:26.632 19263-19377/com.oculus.vrcubeworldsv I/GST_log: > async handler called 02-21 10:00:26.632 19263-19377/com.oculus.vrcubeworldsv I/GST_log: > Got state-changed message 02-21 10:00:26.632 19263-19377/com.oculus.vrcubeworldsv I/GST_log: > async handler called 02-21 10:00:26.632 19263-19377/com.oculus.vrcubeworldsv I/GST_log: > Got state-changed message 02-21 10:00:27.631 19263-19385/com.oculus.vrcubeworldsv I/GST_log: Got a buffer at fakesink 02-21 10:00:28.632 19263-19385/com.oculus.vrcubeworldsv I/GST_log: Got a buffer at fakesink 02-21 10:00:29.631 19263-19385/com.oculus.vrcubeworldsv I/GST_log: Got a buffer at fakesink 02-21 10:00:30.631 19263-19385/com.oculus.vrcubeworldsv I/GST_log: Got a buffer at fakesink Maybe the problem is not really in it. It is possible to set the context just upon element creation, right? Maybe it would be better to focus on this solution. Now I have this kind of code that sets it in the callback, depending on the message: case GST_MESSAGE_NEED_CONTEXT: { // we got gl_display and gl_context and starting of the main loop GstElement *element = GST_ELEMENT (message->src); const gchar *name = gst_element_get_name(element); LOG_INFO("Element %s asks for context. We give => 0x%08x 0x%08x", name, data->egl_context, data->egl_display); const gchar *context_type; gst_message_parse_context_type (message, &context_type); LOG_INFO("got need context %s\n", context_type); if (g_strcmp0 (context_type, GST_GL_DISPLAY_CONTEXT_TYPE) == 0) { GstContext *display_context = gst_context_new (GST_GL_DISPLAY_CONTEXT_TYPE, TRUE); gst_context_set_gl_display (display_context, data->gst_display); gst_element_set_context (GST_ELEMENT (message->src), display_context); return TRUE; } else if (g_strcmp0 (context_type, "gst.gl.app_context") == 0) { GstContext *app_context = gst_context_new ("gst.gl.app_context", TRUE); GstStructure *s = gst_context_writable_structure (app_context); gst_structure_set (s, "context", GST_GL_TYPE_CONTEXT, data->gst_context, NULL); gst_element_set_context (GST_ELEMENT (message->src), app_context); return TRUE; } break; } Is it good enough to set the context right in the beginning (in the app_function)? -- Sent from: <a href="http://gstreamer-devel.966125.n4.nabble.com/" rel="noreferrer" target="_blank">http://gstreamer-devel.966125.n4.nabble.com/</a> <div class="HOEnZb"><div class="h5">_______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.freedesktop.org">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> </div></div></blockquote></div> </div>