Bitrate and resolution matter a lot here, too. Given comprable
video quality levels, MPEG4 takes significantly more CPU to
encode. <br>
<br>
If it doesn't, I may have to seriously reexamine my worldview, because
this is one of the cornerstones of my ontological framework.<br><br><div><span class="gmail_quote">On 11/3/05, <b class="gmail_sendername">Stef Coene</b> <<a href="mailto:stef.coene@docum.org">stef.coene@docum.org</a>
> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">On Thursday 03 November 2005 00:32, Todd Houle wrote:<br>> I have been raving about MythTV to a friend of mine who finally
<br>> decided to try it himself. He had an old PC (1GHz Dell GX150) and 2<br>> old tuner cards (avermedia and hauppauge win-Tv). I don't know the<br>> details of the cards other than they both use the bt878 chips.
<br>><br>> We installed KnoppMyth as that is what he heard about elsewhere.<br>> KnoppMyth detected everything perfectly and ran great. I added the<br>> cards in Myth-setup, but we couldn't use it happily. There was a 1
<br>> second pause, for every second of live tv... I guess these cards<br>> don't have hardware MPEG encoders on them and the computer couldn't<br>> handle the load.. I lowered the quality way down, but still couldn't
<br>> get a smooth playback..<br>><br>> I told him to get a better computer, or a TV card that supports<br>> hardware encoding. Was I right? or was there something else I could<br>> have done?<br>I "downgraded" my mythbox from a Athlon 1400 (computer in the living) to a P3,
<br>700Mhz (computer in the garage).<br>The P3 can handle my bt878 based card, but I had to switch from rtjpeg to<br>mpeg4 (rate of 1800kbit). When I used rtjpeg, the CPU was not powerfull<br>enough so the video was stuttering. With mpeg4, the myth backend uses 85%
<br>CPU power.<br>So it seems that the encoding of mpeg4 needs less cpu than rtjpeg.<br><br><br>Stef<br><br><br>_______________________________________________<br>mythtv-users mailing list<br><a href="mailto:mythtv-users@mythtv.org">
mythtv-users@mythtv.org</a><br><a href="http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users">http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users</a><br><br><br></blockquote></div><br>