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<div class="moz-cite-prefix">On 03/06/2015 05:40 PM, Stefan Sauer
wrote:<br>
</div>
<blockquote cite="mid:54F9D87E.2020400@hora-obscura.de" type="cite">
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<div class="moz-cite-prefix">On 02/28/2015 07:26 PM, Rob wrote:<br>
</div>
<blockquote
cite="mid:CABhifwov+Kt=ZExg7Rbx_v46HS2EGv1YBGPe_WrgNoJVdbzvHg@mail.gmail.com"
type="cite">
<div dir="ltr">On 27 February 2015 at 18:59, Stefan Sauer <span
dir="ltr"><<a moz-do-not-send="true"
href="mailto:ensonic@hora-obscura.de" target="_blank">ensonic@hora-obscura.de</a>></span>
wrote:<br>
<div class="gmail_extra">
<div class="gmail_quote">
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000"> On 02/27/2015
12:38 AM, Rob wrote:<span class=""><br>
<span style="white-space:pre-wrap">><br>
> On Thursday, 26 February 2015, Stefan Sauer
<<a moz-do-not-send="true"
href="mailto:ensonic@hora-obscura.de"
target="_blank">ensonic@hora-obscura.de</a> <a
moz-do-not-send="true"
href="mailto:ensonic@hora-obscura.de"
target="_blank"><mailto:ensonic@hora-obscura.de></a>>
wrote:<br>
><br>
></span><br>
<blockquote type="cite">On 02/18/2015 12:53 PM,
Sebastian Dröge wrote:<br>
> On Di, 2015-02-17 at 16:59 +0000, Luis de
Bethencourt wrote:<br>
>> Hello everyone,<br>
>><br>
>> GStreamer is going to apply for Google
Summer of Code 2015. But we need<br>
>> your help!<br>
>><br>
>> We would really appreciate if you
suggested proposals, volunteered for<br>
>> mentoring, or added content to the
proposals.<br>
>><br>
>> Current list of proposals is here:<br>
>> <a moz-do-not-send="true"
href="http://gstreamer.freedesktop.org/GSOC/socprojects.html"
target="_blank">http://gstreamer.freedesktop.org/GSOC/socprojects.html</a><br>
<br>
> Does anybody have any other ideas, or would
like to be added as a<br>
> potential mentor for any of these projects?
Would be great to get some<br>
> more ideas and potential mentors so we can
properly handle all<br>
> projects :)<br>
<br>
What about porting gst-debug-viewer to gtk+3 and
improving it?<br>
<br>
</blockquote>
</span> Are you suggesting to make this a web-app? If
done cleverly (e.g. open log from url) could be sweet.</div>
</blockquote>
<div> </div>
<div>Imagine a world where for any GStreamer process, you
can do something like:</div>
<div><br>
</div>
<div>GST_DEBUG_PORT=8080</div>
<div><br>
</div>
<div>and then open <a moz-do-not-send="true"
href="http://localhost:8080/graphs">http://localhost:8080/graphs</a>
for a list of pipelines which you can then open to see
their graphs and see them update dynamically. They're
perhaps SVG pipelines that are interactive and
inspectable. Maybe you can even track buffers through
the paths through the pipeline or get statistics about
how long each element spends processing buffers, see
each element's latency contribution, see where overruns
(full queues) or underruns (empty queues) and a bunch of
other stuff are. I would love something like this.</div>
</div>
</div>
</div>
</blockquote>
We all would love that. With the gst-tracer branch we can expose
such data over a socket. One such consumer could be
gst-debug-viewer.<br>
Running this inprocess + the html rendering would have the benefit
that we could access arbitrary data without that we need to change
the socket protocol. <br>
<br>
But sofar I was under impression that running this in-process
would be less preferable as it could potentially affect
performance quite a bit.<br>
<blockquote
cite="mid:CABhifwov+Kt=ZExg7Rbx_v46HS2EGv1YBGPe_WrgNoJVdbzvHg@mail.gmail.com"
type="cite">
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<div class="gmail_extra">
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<div><br>
</div>
<div>Random side-thought: An element knows best how its
input buffers map to output buffers, why not make it an
element's responsibility to indicate that mapping
somehow so that all buffer life cycles are completely
mapped? That plus hooks to get information about a
buffer when it is created / modified / copied /
transformed into another buffer / destroyed should allow
some pretty shiny investigative tools.</div>
</div>
</div>
</div>
</blockquote>
You get such this information in the gst-tracer. The buffer
mapping is more complicated. E.g. imagine buffers read from a
file, processed by demuxer. Should the outputs of the demuxer
still be marked as stemming from the input buffers? Then you do
processing, e.g. audio-resampling and video-rate adaptation. Now
mapping buffer-ids gets tricky for sure. Finally you mux into an
output stream. While there where input buffers containing the
information that also goes into e.g. stream headers, this is
practically unmappable.<br>
<br>
Regarding the tracer: <br>
<a moz-do-not-send="true" class="moz-txt-link-freetext"
href="https://bugzilla.gnome.org/show_bug.cgi?id=733187">https://bugzilla.gnome.org/show_bug.cgi?id=733187</a><br>
</blockquote>
and of course:<br>
<a class="moz-txt-link-freetext" href="http://gstconf.ubicast.tv/videos/a-new-tracing-subsystem-for-gstreamer/">http://gstconf.ubicast.tv/videos/a-new-tracing-subsystem-for-gstreamer/</a><br>
<br>
<blockquote cite="mid:54F9D87E.2020400@hora-obscura.de" type="cite">
<br>
Stefan<br>
<blockquote
cite="mid:CABhifwov+Kt=ZExg7Rbx_v46HS2EGv1YBGPe_WrgNoJVdbzvHg@mail.gmail.com"
type="cite">
<div dir="ltr">
<div class="gmail_extra">
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<div><br>
</div>
<div>Rob</div>
</div>
</div>
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