<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <meta name="GENERATOR" content="MSHTML 10.00.9200.17088"> </head> <body> <div><font size="2" face="Arial"><span class="946450913-24092014">Hello,</span></font></div> <div><font size="2" face="Arial"><span class="946450913-24092014"></span></font> </div> <div><font size="2" face="Arial"><span class="946450913-24092014">I'm trying to do an application using pull mode in some elements.</span></font></div> <div><font size="2" face="Arial"><span class="946450913-24092014"></span></font> </div> <div><font size="2" face="Arial"><span class="946450913-24092014">For testing purpose, I wrote two filters. One filter "pullfilter" uses pull mode for its sink and push mode for its source. The other is a dispenser (wrongly named "mdispatch", based on tee), source pad on requests and giving buffers as pullfilter requests them.</span></font></div> <div><font size="2" face="Arial"><span class="946450913-24092014"></span></font> </div> <div><font size="2" face="Arial"><span class="946450913-24092014">This pipeline works like expected :</span></font></div> <div><font size="2" face="Arial"><span class="946450913-24092014">gst-launch-1.0 fakesrc can-activate-push=false ! pullfilter ! fakesink<br> </span></font></div> <div><font size="2" face="Arial"><span class="946450913-24092014">This one also works :</span></font></div> <div><font size="2" face="Arial"><span class="946450913-24092014">gst-launch-1.0 fakesrc ! queue2 ! pullfilter ! fakesink</span></font></div> <div><font size="2" face="Arial"><span class="946450913-24092014"></span></font> </div> <div><font size="2" face="Arial"><span class="946450913-24092014">With two branches, no problem :</span></font></div> <div><font size="2" face="Arial"><span class="946450913-24092014">gst-launch-1.0 --gst-debug-level=3 fakesrc can-activate-push=false ! mdispatch has-chain=false name=t ! pullfilter ! fakesink t. ! pullfilter ! fakesink<br> </span></font></div> <div><font size="2" face="Arial"><span class="946450913-24092014">But when I put a queue2 in the previous pipeline, it fails :</span></font></div> <div><font size="2" face="Arial"><span class="946450913-24092014">gst-launch-1.0 --gst-debug=pullfilter:5 fakesrc ! queue2 ! mdispatch has-chain=false name=t ! pullfilter ! fakesink t. ! pullfilter ! fakesink</div> </span></font> <div><font size="2" face="Arial">Setting pipeline to PAUSED ...<br> mdispatch<span class="946450913-24092014">: </span>Pull mode not supported by peer<br> mdispatch<span class="946450913-24092014">: </span>Push mode activated<br> mdispatch<span class="946450913-24092014">: </span>Pull mode not supported by peer<br> mdispatch<span class="946450913-24092014">: </span>Push mode activated</font></div> <div><font size="2" face="Arial">0:00:00.011082003 11673 0x80958c0 WARN GST_PADS gstpad.c:974:gst_pad_set_active:<t:sink> Failed to activate pad<br> ERROR: Pipeline doesn't want to pause.<br> Setting pipeline to NULL ...<br> Freeing pipeline ...<br> </font></div> <div><span class="946450913-24092014"><font size="2" face="Arial">I doesn't see why it fails when setting a queue2 to the pipeline (I tested in previous pipeline if "queue2" in pull mode can works with fakesrc in push mode).</font></span></div> <div><span class="946450913-24092014"><font size="2" face="Arial"></font></span> </div> <div><span class="946450913-24092014"></span><span class="946450913-24092014"><font size="2" face="Arial">Is there a problem with the design ?</font></span></div> <div><span class="946450913-24092014"><font size="2" face="Arial"></font></span> </div> <div><span class="946450913-24092014"><font size="2" face="Arial">Thanks,</font></span></div> <div align="left"><font size="2" face="Arial"> <p class="MsoNormal" style="MARGIN-BOTTOM: 12pt"><b><span lang="EN-US" style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'; COLOR: black; mso-fareast-language: FR-BE">Jonathan DEMEYER </span></b><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman','serif'; COLOR: black; mso-fareast-language: FR-BE"><br> </span><span lang="EN-US" style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'; COLOR: black; mso-fareast-language: FR-BE">Software engineer</span></p> <table class="MsoNormalTable" cellpadding="0" border="0"> <tbody> <tr> <td style="PADDING-BOTTOM: 0.75pt; PADDING-TOP: 0.75pt; PADDING-LEFT: 0.75pt; PADDING-RIGHT: 0.75pt"> <p class="MsoNormal"><span style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman','serif'; COLOR: black; mso-fareast-language: FR-BE"><img id="_x0000_i1025" alt="Description : MACQ Traffic & Automation" src="cid:946450913@24092014-3124" width="147" height="85"></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman','serif'; COLOR: black; mso-fareast-language: FR-BE"> <?xml:namespace prefix = "o" ns = "urn:schemas-microsoft-com:office:office" /> <o:p></o:p></span></p> </td> <td style="PADDING-BOTTOM: 0.75pt; PADDING-TOP: 0.75pt; PADDING-LEFT: 0.75pt; PADDING-RIGHT: 0.75pt"> <p class="MsoNormal"><b><span style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'; COLOR: black; mso-fareast-language: FR-BE">Macq sa</span></b><span style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman','serif'; COLOR: black; mso-fareast-language: FR-BE"><br> </span><span style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'; COLOR: black; mso-fareast-language: FR-BE">Rue de l'Aéronef, 2 - 1140 Bruxelles - Belgique</span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman','serif'; COLOR: black; mso-fareast-language: FR-BE"><br> </span><span style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'; COLOR: black; mso-fareast-language: FR-BE">T +32 (0) 2 610 15 87 - F +32 (0) 2 610 15 05 </span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman','serif'; COLOR: black; mso-fareast-language: FR-BE"><br> </span><span style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'; COLOR: black; mso-fareast-language: FR-BE"><a title="mailto:anne.cappelle@macq.eu%20" href="mailto:.jonathan.demeyer@macq.eu"><span title="mailto:anne.cappelle@macq.eu%20" style="COLOR: black">jonathan.demeyer@macq.eu </span></a>- <a title="http://www.macq.eu/" href="http://www.macq.eu/"><span title="http://www.macq.eu/" style="COLOR: black">www.macq.eu</span></a> </span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman','serif'; COLOR: black; mso-fareast-language: FR-BE"><o:p></o:p></span></p> </td> </tr> </tbody> </table> </font></div> <div> </div> </body> </html>