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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">The following pipeline
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">gst-launch-1.0.exe -v videotestsrc do-timestamp=true pattern=snow is-live=true num-buffers=900 ! video/x-raw,width=1920,height=1080,framerate=30000/1001,format=YV12
! tee name=t1 ! queue name=displ<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">-queue max-size-bytes=0 leaky=2 ! valve name=display-valve drop=false ! glimagesink sync=false t1. ! queue name=encode-queue max-size-bytes=124416000 ! valve name=encode-valve
drop=false ! x264enc<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">trate=32768 ! h264parse ! qtmux ! filesink location="f:/temp/out.mp4"<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">produces snow on my display (somewhat delayed which is not important) and a mp4 file.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">This is running the current git master version on a Windows 7 machine.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">When I change the first valve drop to true I neither get snow on the display (expected and wanted) nor do I get a file (perhaps expected but not wanted sid-effect).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">Is this due to the fact that the pipeline as a whole cannot preroll?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">Would I be better using a pad probe and letting the pipeline preroll before blocking the relevant pad.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">If anyone can provide an explanation I would be grateful.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">regards<o:p></o:p></span></p>
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