<div dir="ltr"><div style="font-size:small" class="gmail_default">Pierre:</div><div style="font-size:small" class="gmail_default"><br></div><div style="font-size:small" class="gmail_default">From your last 2 emails and tests as compared to what I see, I am thinking that the graphics board is the bottleneck. Doing similar tests with the Clowns, as compared with your observations below, I am always getting close to 29.97 fps in either X11 or X11-OpenGL. The reason I think it is probably your graphics board is because my laptop is not really a "work" computer but rather a "gaming" computer (it was an inexpensive AMD computer that has never, ever played a single game!) so I would imagine the graphics board is meant to be pretty good.<br></div><div class="gmail_quote"><br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
The results of these tests of the mpeg proxies tell me that with both <br>
the X11-OpenGL driver and the X11 driver, using vdpau results in a very <br>
slight reduction in the use of my CPU, but that this does not improve <br>
the frame rate possible that these video drivers allow to display...<br></blockquote><div><br></div><div style="font-size:small" class="gmail_default">The above seems to indicate that the graphics board does not improve anything and you have plenty of CPU anyway, so you might as well use that.</div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
X11 allows in all cases to display at least 29.97 frame/sec sources that <br>
have been shot at this speed.<br>
<br>
X11-OpenGL is always limited to a maximum of about 12 frames/sec.<br>
<br>
These results are approximately true for all the types of media I <br>
tested, whether DNxHD.mov, HDV (MPEG-2.m2t), AVC H264.mp4 or even <br>
proxies in mpeg.mpeg.<br>
<br>
Given these results, I don't really see the advantage of using <br>
proxies... In any case, the video driver used will determine the <br>
possible frame rate regardless of the type of media used.<br>
<br>
I'm actually wondering if the constant frame rate limit of 12 frames/sec <br>
provided by X11-OpenGL in my tests with 4 mixers, regardless of the <br>
media type, doesn't actually indicate a bug somewhere or a limit <br>
inherent in my equipment. But then how do you explain the best <br>
throughput with X-11?<br></blockquote><div><br></div><div style="font-size:small" class="gmail_default">Instead of working with 29.97 fps media, I loaded Big Buck Bunny which is 60 frames per second. And there may be something strange going on as Pierre indicated that I will have to test on a faster computer. Because when I played this, like Pierre, it seems to limit it at always 30 fps whether I user X11 or OpenGL. Then when I proxy it to 1/2, I thought I should have improved the frame rate but it too was at only 30 fps. <br></div><div style="font-size:small" class="gmail_default"><br></div><div style="font-size:small" class="gmail_default">I will have to do the tests on GG's computer to eliminate the possibility of a limitation / bug. Phyllis<br></div></div></div>