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<p class="MsoNormal">Hi, <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I've noticed some interesting behaviour when playing back h.264 files. On systems with just a few cores (4-6), memory use is high, but reasonable (400-500 mb for 4k video), but on newer systems with 8-12 cores and hyperthreading enabled,
we're seeing very high memory use (1.4 GB) which eventually leads to a memory allocation excpetion in glib (likely due to memory fragmentation).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The symptom can be replicated in gst-launch by varying the max-threads of avdec_h264:<o:p></o:p></p>
<p class="MsoNormal">gst-launch-1.0.exe filesrc location=c:/test.mp4 ! qtdemux ! h264parse ! avdec_h264 max-threads=6 ! autovideosink<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">For each additional thread we're seeing additional memory allocated to gst-launch.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">However, we'd like to continue using playbin (instead of that pipeline above) to more easily support more types of video.
<b>Is there a way to limit the number of threads and/or memory used by avdec_h264 through playbin</b>?
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Here's a quick overview of our systems:<o:p></o:p></p>
<p class="MsoNormal">Gstreamer 1.6.0<o:p></o:p></p>
<p class="MsoNormal">Windows 7<o:p></o:p></p>
<p class="MsoNormal">Xeon Processors - 6-12 cores, some with hyperthreading enabled<o:p></o:p></p>
<p class="MsoNormal">12-16GB ram<o:p></o:p></p>
<p class="MsoNormal">playbin -> appsink -> custom openGL shader pipeline<o:p></o:p></p>
<p class="MsoNormal">720p - 4k video, usually h.264, sometimes prores or other formats<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black;background:white">Gordon Nickel</span></b><span style="font-size:10.5pt;color:black"><br>
</span><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black;background:white">Lead Developer</span><span style="font-size:10.5pt;color:black"><br>
<br>
</span><b><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black;background:white">downstream</span></b><span style="font-size:10.5pt;color:black"><br>
</span><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black;background:white">1624 NW Johnson Street</span><span style="font-size:10.5pt;color:black"><br>
</span><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black;background:white">Portland, OR 97209, USA</span><span style="font-size:10.5pt;color:black"><br>
<br>
</span><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black;background:white">503.226.1944 main</span><span style="font-size:10.5pt;color:black"><br>
</span><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black;background:white">503.226.1283 fax</span><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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