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<p class="MsoNormal"><span lang="EN-US">Hello All,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I am looking at adding branches to a running pipeline dynamically and have run into a problem.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">My setup is Windows 10, running GStreamer V1.18.3 MSVC, and using GstSharp V 1.18.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I have a very simple pipeline <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> “</span><span style="font-size:9.5pt;font-family:Consolas;color:#A31515">videotestsrc ! capsfilter caps=</span><span style="font-size:9.5pt;font-family:Consolas;color:#FF007F">\"</span><span style="font-size:9.5pt;font-family:Consolas;color:black">{caps}</span><span style="font-size:9.5pt;font-family:Consolas;color:#FF007F">\"</span><span style="font-size:9.5pt;font-family:Consolas;color:#A31515">
! tee name=tee ! queue ! avimux ! filesink location=C:</span><span style="font-size:9.5pt;font-family:Consolas;color:#FF007F">\\</span><span style="font-size:9.5pt;font-family:Consolas;color:#FF66B2">\\</span><span style="font-size:9.5pt;font-family:Consolas;color:#A31515">Temp</span><span style="font-size:9.5pt;font-family:Consolas;color:#FF007F">\\</span><span style="font-size:9.5pt;font-family:Consolas;color:#FF66B2">\\</span><span style="font-size:9.5pt;font-family:Consolas;color:#A31515">GstRecordings</span><span style="font-size:9.5pt;font-family:Consolas;color:#FF007F">\\</span><span style="font-size:9.5pt;font-family:Consolas;color:#FF66B2">\\</span><span style="font-size:9.5pt;font-family:Consolas;color:#A31515">Test.avi”<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.5pt;font-family:Consolas;color:#A31515"><o:p> </o:p></span></p>
<p class="MsoNormal">Where caps are <span style="font-size:9.5pt;font-family:Consolas;color:#A31515">
"video/x-raw, format=BGRA, height=240, width=320, framerate=30/1"<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.5pt;font-family:Consolas;color:#A31515"><o:p> </o:p></span></p>
<p class="MsoNormal">When the pipeline transitions to the playing state I add a timeout handler with a 2 second delay to add a branch to the ‘tee’ to display the video, the branch looks like this<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> <span lang="EN-US">“</span><span style="font-size:9.5pt;font-family:Consolas;color:#A31515">queue ! videoconvert ! capsfilter caps=</span><span style="font-size:9.5pt;font-family:Consolas;color:#FF007F">\"</span><span style="font-size:9.5pt;font-family:Consolas;color:black">{caps}</span><span style="font-size:9.5pt;font-family:Consolas;color:#FF007F">\"</span><span style="font-size:9.5pt;font-family:Consolas;color:#A31515">
! autovideosink”<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.5pt;font-family:Consolas;color:#A31515"><o:p> </o:p></span></p>
<p class="MsoNormal">Where caps are <span style="font-size:9.5pt;font-family:Consolas;color:#A31515">
"video/x-raw, format=NV12, height=240, width=320, framerate=30/1"</span><span style="font-size:9.5pt;font-family:Consolas;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.5pt;font-family:Consolas;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:black">The branch is added, linked and synched successfully. I can see that all the elements transition to the playing state except for the video sink which only transitions to ‘ready’ and the pipeline transitions to
paused. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:black">If I swap out ‘autovideosink’ for ‘fakesink’ the same thing happens. However, if I swap out the entire branch with the following<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:black"> </span><span lang="EN-US">“</span><span style="font-size:9.5pt;font-family:Consolas;color:#A31515">queue ! videoconvert ! x264enc ! h264parse !capsfilter caps=</span><span style="font-size:9.5pt;font-family:Consolas;color:#FF007F">\"</span><span style="font-size:9.5pt;font-family:Consolas;color:black">{caps}</span><span style="font-size:9.5pt;font-family:Consolas;color:#FF007F">\"</span><span style="font-size:9.5pt;font-family:Consolas;color:#A31515">
! fakesink”</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
<p class="MsoNormal">Where caps are <span style="font-size:9.5pt;font-family:Consolas;color:#A31515">
"video/x-h264, stream-format=byte-stream, alignment=au"</span><span style="font-size:9.5pt;font-family:Consolas;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Then all the elements transition to playing and I can also see the pipeline transition back to playing.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I would be grateful for any handy hints or tips, help or assistance, especially that relating to debug categories that I could use to help identify the problem.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Many Thanks<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Jon<o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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