<div dir="ltr"><div><div>Tim,<br><br></div>Thank you very much! That seems to have worked. I will continue testing, the pipeline does not seem to be extremely stable just yet. It seems to work for a few video recordings and then simply hangs. Not sure what is hanging. Also, the start up of the pipeline for the first time adding the recording pipeline segment seg-faults from time to time. Any ideas on that? I suspect that this is the same cause for the hanging mentioned earlier.<br>
<br></div>Regards,<br>Tye<br></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Aug 12, 2014 at 4:08 AM, Tim Müller [via GStreamer-devel] <span dir="ltr"><<a href="/user/SendEmail.jtp?type=node&node=4668284&i=0" target="_top" rel="nofollow" link="external">[hidden email]</a>></span> wrote:<br>
<blockquote style='border-left:2px solid #CCCCCC;padding:0 1em' class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
On Mon, 2014-08-11 at 06:25 -0700, tnewman wrote:
<br><br>Hi,
<br><div><div class='shrinkable-quote'><br>> I have been attempting to create a complex pipeline with some success except
<br>> for how to close the video saving (avimux) portion of the stream. Below one
<br>> will find an illustration of the pipeline.
<br>>
<br>>
<br>>
<br>> Here is the story: I have an embedded device where I need to create a video
<br>> stream to a fakesink; where the fakesink is used to hand framebuffers to a
<br>> Qt application to be displayed in a widget. This is the primary stream
<br>> connected to the tee as seen above. The second portion of the stream is the
<br>> connected to the tee on request (a user pushes a Qt button) and begins
<br>> recording an AVI file to disk. The addition of this pipeline to the tee
<br>> seems to be working (most of the time, sometimes the pipeline hangs; but
<br>> that is for later). The issue is when the user presses the Qt button again
<br>> to stop the recording. The first time through it works, the filesink sees a
<br>> EOS event and the file terminates with an updated header. The problem comes
<br>> the second time around. From the g_print statements one sees this:
<br>>
<br>>
<br>>
<br>> And thereafter the pipeline fails.
<br>>
<br>> Below one will find the source code for the project. Any help would be
<br>> greatly appreciated.
<br>>
<br>>
<br>>
<br>> I have tried may variants with no success. So the real question is: how does
<br>> one unlink a section of the pipeline from the tee, terminate the avimux and
<br>> audio source elements to create a proper AVI file, remove the elements from
<br>> the pipeline and then at a later time recreate these elements, link them,
<br>> and do it all over again.
</div></div>event_probe_cb() will be called from the streaming thread, the same
<br>thread you want to shut down. This won't really work well like this.
<br>What you should work better is something like this:
<br><br> - set g_object_set (pipeline, "message-forward", TRUE, NULL)
<br> so you get a message on the bus even if just filesink is EOS
<br> (but not the other sink)
<br><br> - wait for an GST_MESSAGE_ELEMENT on the bus like this:
<br><br> case GST_MESSAGE_ELEMENT:{
<br> const GstStructure *s = gst_message_get_structure (msg);
<br><br> if (gst_structure_has_name (s, "GstBinForwarded")) {
<br> GstMessage *forward_msg = NULL;
<br><br> gst_structure_get (s, "message", GST_TYPE_MESSAGE, &forward_msg,
<br>NULL);
<br> if (GST_MESSAGE_TYPE (forward_msg) == GST_MESSAGE_EOS) {
<br> ... shut down / remove pipeline branch ...
<br> }
<br> }
<br> break;
<br> }
<br><br> - This assumes you unlinked the tee branch and sent an EOS
<br> yourself on the queue's sink pad before jpegenc and
<br> to audiotestsrc via gst_element_send_event().
<br><br> Cheers
<br> -Tim
<br><br>--
<br>Tim Müller, Centricular Ltd - <a href="http://www.centricular.com" rel="nofollow" link="external" target="_blank">http://www.centricular.com</a><br><br>_______________________________________________
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