On Thursday 03 November 2005 00:32, Todd Houle wrote: > I have been raving about MythTV to a friend of mine who finally > decided to try it himself. He had an old PC (1GHz Dell GX150) and 2 > old tuner cards (avermedia and hauppauge win-Tv). I don't know the > details of the cards other than they both use the bt878 chips. > > We installed KnoppMyth as that is what he heard about elsewhere. > KnoppMyth detected everything perfectly and ran great. I added the > cards in Myth-setup, but we couldn't use it happily. There was a 1 > second pause, for every second of live tv... I guess these cards > don't have hardware MPEG encoders on them and the computer couldn't > handle the load.. I lowered the quality way down, but still couldn't > get a smooth playback.. > > I told him to get a better computer, or a TV card that supports > hardware encoding. Was I right? or was there something else I could > have done? I "downgraded" my mythbox from a Athlon 1400 (computer in the living) to a P3, 700Mhz (computer in the garage). The P3 can handle my bt878 based card, but I had to switch from rtjpeg to mpeg4 (rate of 1800kbit). When I used rtjpeg, the CPU was not powerfull enough so the video was stuttering. With mpeg4, the myth backend uses 85% CPU power. So it seems that the encoding of mpeg4 needs less cpu than rtjpeg.
Stef
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