<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div><div>On 25 Mar 2014, at 13:23, Krzysztof Borowczyk <<a href="mailto:k.borowczyk@samsung.com">k.borowczyk@samsung.com</a>> wrote:</div><blockquote type="cite">
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<div class="Section1"><p class="MsoNormal"><span style="font-family: Calibri, sans-serif; font-size: 11pt;">Recently I was trying to capture video from
HDMI with Intensity Pro card. I installed the latest drivers from Blackmagic.</span></p><p class="MsoNormal"><span lang="EN-US">Capturing with their software works well,
but when I tried to use GStreamer I get a very low framerate (aroud 1-2 frames
/ sec.).<o:p></o:p></span></p><p class="MsoNormal"></p><p class="MsoNormal"></p></div></div></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">[...]</blockquote><blockquote type="cite"><div lang="PL" link="blue" vlink="purple"><div class="Section1"><p class="MsoNormal"><span lang="EN-US"> </span></p><p class="MsoNormal"><span lang="EN-US">The command used is:<o:p></o:p></span></p><p class="MsoNormal"><span lang="EN-US">gst-launch-1.0 decklinksrc mode=9
connection=1 device-number=0 ! videoconvert ! autovideosink<o:p></o:p></span></p><p class="MsoNormal"><span lang="EN-US"> </span></p><p class="MsoNormal"><span lang="EN-US">Can you tell me, if this is caused by the
decklinksrc? Or is there a possibility, that the videoconvert slows things that
much?<o:p></o:p></span></p></div></div></blockquote><br></div><div><br></div><div><div>Try turning on debug for the decklinksrc:</div><div><br></div><div> GST_DEBUG=decklinksrc:6 gst-launch-1.0 ...</div><div><br></div><div>That will tell you if it is having to drop frames because the pipeline</div><div>isn't receiving them fast enough. If that's the case try adding a queue</div><div>after decklinksrc (?).</div><div><br></div><div><div>You could also try "autovideosink sync=false" and see what happens (you</div><div>probably don't want to do that in practice, but trying it might give some</div><div>insight as to what's causing your low framerate).</div></div><div><br></div><div>Maybe also try with fakesink, to eliminate videoconvert and your video</div><div>sink from the equation: gst-launch-1.0 decklinksrc mode=... ! fakesink</div></div><div><br></div></body></html>