<div dir="ltr"><div dir="ltr"><div class="gmail_default" style="font-size:small">Stefan, in looking at the performance improvements you outlined below, this one is really a HUGE improvement:</div><div class="gmail_default" style="font-size:small"> - modifying the "stacked video" (opacity 100%) to disable "Play track" in the patchbay for the tracks that you do not need to see is the winner. I will add that to the Performance Tips section of the manual. It is a great tip for any computer, not just the smaller ones.</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">But in my tests "for a disabled video effect, the CPU still runs", I did not see this happening using the "top" command. It seemed to make a nice difference in lowering the cpu when I disabled the plugin. Maybe it is just the plugin I used? Burning Tv? I will try some different ones. Also I did not verify that colourspace made no difference, but I am sure you are right about that.</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">Thanks for this tip that we can pass along to other users via the manual. ...Phyllis<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Jul 22, 2024 at 3:26 AM Stefan de Konink via Cin <<a href="mailto:cin@lists.cinelerra-gg.org">cin@lists.cinelerra-gg.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">I think have a significant opportunity to improve the Cinerella <br>
performance, under normal editing conditions, by n_videotracks-fold. At <br>
this point in time I notice that the CPU usage (decoding) for a section <br>
where multiple tracks are stacked, but only the top one is actually on <br>
screen (read opacity 100%) could be improved.<br>
<br>
I observe the following:<br>
<br>
- for a disabled video effect, the CPU still runs<br>
- for stacked video, the CPU still runs for both videos<br>
- the effect must be detached and the video below must have play track<br>
disabled to prevent the CPU to go from 20% to 150%<br>
- this is independent of colourspace (RGB, RGBA, YUV or YUVA)<br>
<br>
-- <br>
Stefan<br>
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</blockquote></div></div>