<html>
<head>
<meta http-equiv="Content-Type" content="text/html;
charset=windows-1252">
</head>
<body>
<p>Hi Thorsten,</p>
<p>I don't have answers but let me ask something.</p>
<p>I'd like to know if you notice some broken image during
streaming?<br>
It seems you stream from browser to GStreamer? Right? So do I.<br>
I tried to stream screen share or window share and image get
broken after some time. Soon or later - always.</p>
<p>Thanks,<br>
deim<br>
</p>
<div class="moz-cite-prefix">Dne 25. 11. 20 v 9:43 Soebirk, Thorsten
napsal(a):<br>
</div>
<blockquote type="cite"
cite="mid:05312c35d7cb41cea3298872675e3e08@tpdsexm2.SOLCO.GLOBAL.NTTDATA.COM">
<meta http-equiv="Content-Type" content="text/html;
charset=windows-1252">
<meta name="Generator" content="Microsoft Word 15 (filtered
medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;
mso-fareast-language:EN-US;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:#954F72;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
mso-fareast-language:EN-US;}size:612.0pt 792.0pt;
margin:3.0cm 2.0cm 3.0cm 2.0cm;}
div.WordSection1
{page:WordSection1;}</style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
<div class="WordSection1">
<p class="MsoNormal">I’m working on an application that renders
video streamed via WebRTC, and I am a little puzzled by the
amount of CPU and GPU that this uses. The pipeline is
basically as follows:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">webrtcbin ! queue ! glimagesink<br>
<br>
While streaming an HD video source, my application (on
Windows) is using appr. 10% CPU and 25% GPU. If I view the
exact same WebRTC stream in the Chrome browser, it uses appr
4% CPU and 0% GPU.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I know the absolute number given here mean
nothing, but I am struck by the fact that Chrome can render
this using half the CPU and without using the GPU at all.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am fairly certain that the resources are
consumed in glimagesink and not the other elements of the
pipeline, because if I replace glimagesink with fakesink, then
my application’s resource consumption essentially goes to
zero. Also, if I insert a caps filter before the sink to
reduce the resolution, this also reduces total resource usage,
despite being an additional processing step.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’ve also tried replacing glimagesink with
d3dvideosink. Both use roughly the same resources.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Given that Chrome is likely highly
optimized for this particular use case where Gstreamer is a
much more general framework, I would not necessarily expect
performance parity in this case, but does anyone have any
suggestions for possibly reducing resource usage while
maintaining video quality and resolution in this scenario? I’m
also struggling to understand why glimagesink and d3dvideosink
would be using the GPU at all (much less so heavily) when
Chrome seems to do entirely without.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">/ Thorsten<o:p></o:p></p>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<pre class="moz-quote-pre" wrap="">_______________________________________________
gstreamer-devel mailing list
<a class="moz-txt-link-abbreviated" href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a>
<a class="moz-txt-link-freetext" href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a>
</pre>
</blockquote>
</body>
</html>