Hi,<br>I'm not convinced your numbers absolve the IO subsystem. What about stats on iowait or disk throughput?<br>Each 720x576 YV12 frame is ~600kbytes, even reading 60fps could start causing issues on a single SATA drive.<br>
Try encoding your input video from a ramdisk.<br><br>Alex<br><br><div class="gmail_quote">On 7 April 2010 12:05, kenter <span dir="ltr"><<a href="mailto:kenter83@gmail.com">kenter83@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div>Thanks for all your help. I've tried your commandline, the result shows for --preset slow, CPU ultilize only 700+ and fps is 70.46. The CPU power is still largely wasted.</div>
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<div>The disk bandwidth is I also tried <i>--preset ultrafast</i>, the fps can achieves to 800+, which means that disk bandwidth shouldn't be our bottle-neck.<br></div></blockquote></div>