<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;">Dear sir,<br>Thank you for your answer. When I use the option --fps with different value, I have the result:<br>Qp --fps Fps (encoding) Bitrate<br>30 10 19.21 17.13<br> 12 20.55 20.56<br> 14 20.4 23.99<br> 16
20.29 27.41<br> 18 19.81 30.84<br> 20 20.99 34.27<br> 22 19.98 37.69<br> 24 20.5 41.12<br> 25
19.17 42.83<br> 26 19.88 44.55<br> 28 20.45 47.97<br> 30 20.56 51.4<br> 32 10.45 54.83<br> 34 16.44 58.25<br> 36 16.13
61.68<br> 38 16.48 65.11<br> 40 16.63 68.53<br> 60 11.75 108.8<br><br>As I have known that the output bitrate is better, the PSNR (video quality) is higher. However, when I watch the video encoded by different --fps value, I can not realize this and I have also try to calculate psnr between these videoes, the result said that these video have the same psnr.<br>Could you explain it for me?<br>Thanks.<br><br><br><br>--- On <b>Tue, 5/12/09, Jason Garrett-Glaser <i><darkshikari@gmail.com></i></b> wrote:<br><blockquote style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left:
5px;"><br>From: Jason Garrett-Glaser <darkshikari@gmail.com><br>Subject: Re: [x264-devel] what is the difference between fps parameters!<br>To: "Mailing list for x264 developers" <x264-devel@videolan.org><br>Date: Tuesday, May 12, 2009, 3:15 AM<br><br><div class="plainMail">On Mon, May 11, 2009 at 1:08 PM, bun bun <<a ymailto="mailto:binhlh86@yahoo.com" href="/mc/compose?to=binhlh86@yahoo.com">binhlh86@yahoo.com</a>> wrote:<br>> Hi all,<br>> I use this command for encode:<br>> ./x264 -q 30 --bframes 2 --ipratio 1.4 --pbratio 1.3 -p 1 --fps 10<br>> /root/Desktop/PSNR_tobe_in_rush/fps/akiyo_cif.yuv 352x288 -o<br>> /root/Desktop/PSNR_tobe_in_rush/fps/fps10_qp30.264 -v --progress<br>><br>> output:<br>> ==><br>> encoded 300 frames, 20.90 fps, 17.13 kb/s ==> what is the difference between<br>> --fps 10 and the output fps 20.90?<br><br>That's the encoding speed, not the output fps.<br><br>Dark
Shikari<br>_______________________________________________<br>x264-devel mailing list<br><a ymailto="mailto:x264-devel@videolan.org" href="/mc/compose?to=x264-devel@videolan.org">x264-devel@videolan.org</a><br><a href="http://mailman.videolan.org/listinfo/x264-devel" target="_blank">http://mailman.videolan.org/listinfo/x264-devel</a><br></div></blockquote></td></tr></table><br>