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<p class="MsoNormal">Hi,</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">I am trying to create an application that records RTSP/RTP stream to a MP4 file.
</p>
<p class="MsoNormal">I am able to record the stream using gst-launch in the following way as mentioned below.
</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"><i>gst-launch-0.10.exe rtspsrc location=rtsp://streaming1.osu.edu/media2/ufsap/ufsap.mov ! rtph264depay byte-stream=false ! capsfilter caps="video/x-h264,width=320,height=240,framerate=(fraction)25/1" ! mp4mux ! filesink location=d:\\test\\dump.mp4</i></p>
<p class="MsoNormal"> </p>
<p class="MsoNormal" style="text-autospace:none">Recording is not working, when I follow same steps in my application. I get NULL caps, when I make “gst_pad_get_negotiated_caps” call on<span style="font-size:9.0pt; font-family:Consolas">
</span>rtph264depay source pad after linking rtph264depay and mp4mux elements.</p>
<p class="MsoNormal" style="text-autospace:none">The dot files generated using my application and gst-launch are also slightly different. The .dot files are also attached to this message.<span style="font-size:9.0pt; font-family:Consolas"></span></p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Can someone please help me with this?</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Please find the source file attached. Here are the steps I followed in the application.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">main function </p>
<p class="MsoListParagraph" style="text-indent:-18.0pt"><span style="font-family:Symbol"><span style="">·<span style="font:7.0pt "Times New Roman"">
</span></span></span>Creates rtspsrc, rtph264depay, mp4mux and elements </p>
<p class="MsoListParagraph" style="text-indent:-18.0pt"><span style="font-family:Symbol"><span style="">·<span style="font:7.0pt "Times New Roman"">
</span></span></span>Sets location property of rtspsrc to “rtsp://streaming1.osu.edu/media2/ufsap/ufsap.mov”</p>
<p class="MsoListParagraph" style="text-indent:-18.0pt"><span style="font-family:Symbol"><span style="">·<span style="font:7.0pt "Times New Roman"">
</span></span></span>Attaches a signal handler “pad_added_handler” to pad-added on rtspsrc</p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.0pt; font-family:Consolas"> </span></p>
<p class="MsoNormal">pad_added_handler function</p>
<p class="MsoListParagraph" style="text-indent:-18.0pt"><span style="font-family:Symbol"><span style="">·<span style="font:7.0pt "Times New Roman"">
</span></span></span>Checks if it is application/x-rtp and H264 type</p>
<p class="MsoListParagraph" style="text-indent:-18.0pt"><span style="font-family:Symbol"><span style="">·<span style="font:7.0pt "Times New Roman"">
</span></span></span>Sets byte-stream property on rtph264depay to false</p>
<p class="MsoListParagraph" style="text-indent:-18.0pt"><span style="font-family:Symbol"><span style="">·<span style="font:7.0pt "Times New Roman"">
</span></span></span>Links new pad and sink pad on rtph264depay</p>
<p class="MsoListParagraph" style="text-indent:-18.0pt"><span style="font-family:Symbol"><span style="">·<span style="font:7.0pt "Times New Roman"">
</span></span></span>Creates cap element with gst_caps_new_simple( "video/x-h264", ”width", G_TYPE_INT, 320, "height", G_TYPE_INT, 240,"framerate", GST_TYPE_FRACTION, 25, 1, NULL)</p>
<p class="MsoListParagraph" style="text-indent:-18.0pt"><span style="font-family:Symbol"><span style="">·<span style="font:7.0pt "Times New Roman"">
</span></span></span>Links rtph264depay and mp4mux using created caps</p>
<p class="MsoListParagraph" style="text-indent:-18.0pt"><span style="font-family:Symbol"><span style="">·<span style="font:7.0pt "Times New Roman"">
</span></span></span>Links mp4mux and filesink</p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.0pt; font-family:Consolas; color:#A31515"> </span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.0pt; font-family:Consolas; color:#A31515"> </span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.0pt; font-family:Consolas; color:#A31515"> </span></p>
<p class="MsoNormal">Regards,</p>
<p class="MsoNormal">Raja</p>
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