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</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hi<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I’m trying to write an app that will capture H.264 frames from an IP camera via an RTSP source into an app sink. It’s actually a shared library for a SIP application for video calls. As long as I can extract the H.264 frames and forward them on, I don’t have much to do to get this working.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Here is the pipeline I’m using:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>rtspsrc name=rtspsrc is-live=TRUE location="rtsp://admin:admin@192.168.1.51:554/stream1" latency=100 ! rtph264depay name=depay ! video/x-h264,stream-format=byte-stream,alignment=nal ! appsink name=sink emit-signals=TRUE drop=TRUE<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I seem to be capturing frames ok and I’d even go as far as saying they are valid, but from debug output further up the chain there doesn’t appear to be a reference frames and when I try to view the remote video I just see a black screen (once and only once I saw a broken up image). I have also tried adding the width/height/framerate fields in as well, but that hasn’t helped.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>The fact that I don’t think there are any keyframes makes me nervous and perhaps (probably) why the remote side is showing a black screen because it is only receiving difference frames. The camera source is set-up to be 720x480 at 20 fps, iframe interval is 20, VBR 5000 kbps.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='mso-fareast-language:EN-GB'>Regards<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-GB'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-GB'>Gary Metalle<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-GB'>Embedded Software Engineer</span><span style='font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-language:EN-GB'><o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>