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<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am working on a custom appsrc that produces audio and will ultimately stream it via webrtcbin. The pipeline looks like this (some details left out for clarity):<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">appsrc ! queue ! opusenc ! rtpopuspay ! queue ! capsfilter<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">It gets connected to webrtcbin in my code. The pipeline starts up correctly and begins playing, but as soon as appsrc.push_buffer is called, GStreamer throws the following errors.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">GStreamer-WARNING **: 09:53:28.785: ../gst/gstpad.c:4551:gst_pad_push_data:<opusenc0:src> Got data flow before segment event<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">GStreamer-WARNING **: 09:53:28.785: ../gst/gstpad.c:4298:gst_pad_chain_data_unchecked:<rtpopuspay0:sink> Got data flow before segment event<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">GStreamer-CRITICAL **: 09:53:28.785: gst_segment_to_running_time: assertion 'segment->format == format' failed<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">GStreamer-WARNING **: 09:53:28.785: ../gst/gstpad.c:4551:gst_pad_push_data:<rtpopuspay0:src> Got data flow before segment event<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have tried replacing my appsrc with audiotestsrc, and in this case the pipeline works and there are no errors.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have tried troublehooting by replacing elements with fakesink, e.g. “appsrc ! fakesink”, “appsrc ! queue ! opusenc ! fakesink”, etc. The errors start occurring when rtpopuspay appears in the pipeline.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have tried sending a SEGMENT event before calling push_buffer, but this doesn’t change anything. Admittedly, I am not sure how to populate the SEGMENT event if it is relevant. I looked through the source code of audiotestsrc, and as far
as I can tell, it does not send a SEGMENT event.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Can anyone see what I am doing wrong?<o:p></o:p></p>
<p class="MsoNormal"><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Verdana",sans-serif;color:#86807D;mso-fareast-language:EN-GB">Best regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Verdana",sans-serif;color:#86807D;mso-fareast-language:EN-GB">Thorsten</span><span style="font-size:12.0pt;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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