J.Pilk at tesco
Dec 18, 2011, 12:39 PM
Views: 1494
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FreeviewHD (UK) scanning/partial lock problem
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I've just connected a PCTVnanoStick T2 to my laptop running 0.24-fixes
under SL6 with the driver package created by the media_build script.
This was done shortly before similar kmdls became available for Fedora
and RHEL6-near-clones from ATrpms.
I'm lacking HD display and processing capability at present, but I've
seen both SD and HD channels with VLC; Myth is OK with SD but gets only
partial lock on HD.
For vlc the procedure is: Media > Open Capture Device > DVB >
DVB-T/Transponder Frequency (769666kHz for Waltham)/Bandwidth 8MHz >
Watch the pretty pictures - in my case sometimes a bit pixellated.
This gives BBC HD: other programs are selected from Playback > Program.
The same procedure gives SD if an appropriate mux frequency is
specified. HD Codec info reported 1920*1080 resolution.
In Mythtvsetup the identification of the right options for the device
was confusing: several card types and chips were offered as
possibilities but only the DVB-T option seems to do anything useful.
For Mythtvsetup use the Transport Editor to define frequency
(769666666Hz), Bandwidth 8MHz and Modulation QAM-256, then scan;
scanning with transport links enabled populated the 5 SD transports and
also found the 4 HD channels but didn't add netid or tid to the HD
transport. Scanning just the HD transport without the links found just
the HD channels. Starting from the SD transports didn't link to the HD
transport. Scanning the HD transport without presetting to QAM-256
found nothing.
Details of the HD channels found, and a few SD for comparison:
qam_256:769666666:BBC HD:54:12323:9018:17472:16517=16517:dvb
0:cnt(pnum:1,channum:1)
qam_256:769666666:BBC One HD:50:12323:9018:17540:16517=16517:dvb
0:cnt(pnum:1,channum:1)
qam_256:769666666:ITV1 HD:51:12323:9018:17605:16517=16517:dvb
0:cnt(pnum:1,channum:1)
qam_256:769666666:Channel 4 HD:52:12323:9018:17664:16517=16517:dvb
0:cnt(pnum:1,channum:1)
qam_64:794000000:BBC ONE:1:12323:9018:4166:4166=4166:dvb
0:cnt(pnum:1,channum:1)
qam_64:794000000:BBC TWO:2:12323:9018:4287:4166=4166:dvb
0:cnt(pnum:1,channum:1)
qam_64:794000000:BBC THREE:7:12323:9018:4288:4166=4166:dvb
0:cnt(pnum:1,channum:1)
But on starting Mythfrontend I get:
011-12-18 20:11:38.351 DTVSM(/dev/dvb/adapter0/frontend0) Error: Wrong
PMT; pmt->pn(17472) desired(17540)
2011-12-18 20:11:38.368 DTVSM(/dev/dvb/adapter0/frontend0) Error: Wrong
PMT; pmt->pn(17664) desired(17540)
2011-12-18 20:11:38.394 DTVSM(/dev/dvb/adapter0/frontend0) Error: Wrong
PMT; pmt->pn(17605) desired(17540)
Is this the cause of the partial lock, and should it be reported
somewhere else?
TIA
John P
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FreeviewHD (UK) scanning/partial lock problem
