Matthew Linden wrote: > mike choy wrote: > >> Matthew Linden wrote: >> >>> mike choy wrote: >>> >>>> Matthew >>>> >>>> if tzap is tuning that is pretty good, can you get a picture using >>>> dvbstream >>>> >>>> =============from ethics gradient===================================== >>>> >>>> "Now look at your channels.conf file for the channel you tuned >>>> above. For my setup on the Crystal Palace transmitter this line >>>> looks like: >>>> >>>> BBC >>>> ONE:505833330:INVERSION_OFF:BANDWIDTH_8_MHZ:FEC_3_4:FEC_NONE:QAM_16:TRANSMISSION_MODE_2K:GUARD_INTERVAL_1_32:HIERARCHY_NONE:600:601 >>>> >>>> >>>> The last two numbers are the IDs of the video and audio stream >>>> within the multiplex. We also need the transmission parameters to >>>> feed to dvbstream. The command I would use for the channel above is >>>> this: >>>> >>>> *# dvbstream -o -ps -qam 16 -cr 3_4 600 601 | mplayer -* >>>> >>>> You'll need different options if you have DVB-S or DVB-C. See the >>>> documentation for dvbstream. >>>> >>>> The result should be a perfect DVB picture of your chosen channel. >>>> It should not stutter or break up and the audio should be clean. >>>> It's just possible that occasional artefacts may appear but they >>>> shouldn't be very noticeable. If the video breaks up, has major >>>> colour problems, has a very low frame rate or is corrupt then there >>>> is something wrong. >>>> ================================================================== >>>> >>> Mike, >>> >>> It freezes after a couple of minutes using dvbstream and mplayer in >>> exactly the same way as with Kaffeine and xawtv4. >>> >>> I really do think the problem is with the USB power draw. A >>> colleague was telling me this morning that boards for AMD CPUs are >>> well known for having low power USB ports. >>> >>> Matthew >>> >>> _______________________________________________ >>> >>> linux-dvb@xxxxxxxxxxx >>> http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb >>> >> Might be worth trying an externally powered USB hub. >> eg I have some ports on my monitor which are powered by the monitor, >> and these worked for my ipod >> compared to the ports on the mother board on one of my machines. >> >> Mike C > > Problem solved - albeit with yet more ugly gubbins and cables. > > The card works fine with no freezes when using an externally powered > USB hub. > > Thanks for the suggestion. > > Matthew > >> >> > > > _______________________________________________ > > linux-dvb@xxxxxxxxxxx > http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb > Excellent, now this begs the question, how does one find out if ones USB 2.0 port is high powered or not, surely there is some sort of spec. Mike C
