On 6/20/05, Christiaan Lutzer <[EMAIL PROTECTED]> wrote: > Greetings, > > I just joined the list, so please forgive me if I'm posting this on an > incorrect list. > > I've been using MythTV for a while now, and have for the last month or > so been trying to get a new system built using only an HD-3000 > (www.pchdtv.com). No matter what configuration I tried, the Channel > Editor's scanning facility simply would fail with tuning errors. I > took a step back from MythTV and learned how the DVB drivers work and > even created a program (based on dtvstream) called dvbrecord that > tunes to a specified frequency, parses the Multi-Program Transport > Stream (MPTS), uses a specified program number to filter out a single > program and stores the resultant Single Program Transport Stream > (SPTS) to disk. > > Dvbrecord works great. I added a scanning feature that has it go > through all of the US Cable frequencies and a reasonable set of > program numbers, and captures SPTSs to disk for review. This allowed > me to start associating frequency/program numbers with Digital TV > channels. NOTE: I thought it was very cool that I could capture and > view both SD and HD streams with dvbrecord/mplayer. > > FYI: I live in Cambridge, MA near MIT, and have Comcast Digital Cable. > I have not yet completed my catalogue of Digital TV programs, but > here is what I've learned so far: > > http://mandalore.dyndns.biz/~clutzer/dtv.txt > > Anyway, onto why this message is appropriate for this email list: I > had to alter my libmythtv library sources in order to get this to > work. The HD-3000 card is recognized as an ATSC card. For the life > of me I could not get scanning to work, so I had to figure out > something else to do. I noticed that if the card was a QAM (FE_QAM) > card, that you could supply a "channels.conf" file in lieu of > scanning. However, with ATSC, the GUI components are not there to > allow you to enter a channels.conf file if the card is ATSC. So, I > hacked the code to: > > 1.) Allow one to specify a channels.conf file if your card is of type ATSC, > and > > (scanwizardhelpers.cpp) > case CardUtil::ATSC: > addSelection(tr("Full Scan"), > QString::number(FullScan_ATSC),true); > + addSelection(tr("Import channels.conf"), > + QString::number(Import)); > > 2.) Modified the DVBConfParser to read in the program number from > channels.conf if the card type is ATSC. > > (dvbconfparser.cpp) > bool DVBConfParser::parseConfATSC(QStringList& tokens) > { > cerr << "DVBConfParser::parseConfATSC(): parsing tokens..." << endl; > > Channel c; > QStringList::Iterator i = tokens.begin(); > QStringList::Iterator end = tokens.end(); > if (i != end) c.name = *i++; else return false; > if (i != end) c.frequency = (*i++).toInt(); else return false; > if (i == end || !c.modulation.parseConf(*i++)) return false; > + // We need the program number in the transport stream, otherwise we cannot > + // "tune" to the program. > + if (i != end) c.serviceid = (*i++).toInt(); else return false; > > channels.append(c); > > return true; > } > > And, the channels.conf file that I used simply looked like: > [EMAIL PROTECTED] ~]# cat channels.conf > PBS HDTV:585000000:QAM_256:1 > CBS HDTV:603000000:QAM_256:2 > ABC HDTV:597000000:QAM_256:1 > NBC HDTV:597000000:QAM_256:2 > FOX HDTV:603000000:QAM_256:1 > TNT HDTV:681000000:QAM_256:1 > GBH Kids DTV:591000000:QAM_256:2 > > Now, to me, if you want to use MythTV to record and view HD and SD > Digital TV, it would be very difficult programmatically to determine > what frequency and program number corresponded to what XMLTV ID. So, > to me anyway, channels.conf seems like the way to go. > > Does this hack make sense? Is there a better way to do it? Am I nuts? > > Side question: You may have noticed that I added a non-HD stream, "GBH > Kids DTV". This captures and plays fine using VLC, but locks up > mythfrontend. Any idea why HD would work, but SD would lock up the > frontend? > > Thanks! > > Christiaan. > _______________________________________________ > mythtv-users mailing list > [email protected] > http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users >
I don't have any answers to your questions, but maybe you could post your dvbrecord so other folks could use it to scan their cable as well. _______________________________________________ mythtv-users mailing list [email protected] http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
