> Actually I'm not sure I have - I verified it was actually writing the > stream, but upon playback the mpeg is VERY jerky (imagine trying to > playback a dvd on an old pentium, it plays it but very slowly as if it > can't decode fast enough).
It's only playing maybe one frame in 5? This is almost certainly poor reception quality - I only have access to a small set-top aerial and have spent many happy hours making minute adjustments to its positioning, and then sitting in 'just the right place' to get a smooth playback. dvbtune is your friend here... $ dvbtune -f 537833 -qam 16 -cr 3_4 to lock onto the signal then $ dvbtune -f 537833 -qam 16 -cr 3_4 -m to view a monitor of signal quality: Signal=9766, Verror=24462, SNR=41120dB, BlockErrors=0, (S|L|C|V|SY|) Signal=9766, Verror=24100, SNR=40349dB, BlockErrors=0, (S|L|C|V|SY|) Signal=9766, Verror=23684, SNR=41120dB, BlockErrors=0, (S|L|C|V|SY|) Signal=10023, Verror=23201, SNR=40606dB, BlockErrors=0, (S|L|C|V|SY|) That's the current output from my main BBC mux. Even though it Report BlockErrors = 0, my picture is still jerky and shows artefacts... You really need a Verror value of about 10,000 or lower before you will get reliably smooth reception. If you have a VCR or a Sky Digibox or something, try feeding the roof-top aerial through that, and connecting the output directly to your Nova-t . The VCR/Digibox will act as a pre-amplifier and you should get better pictures :) Be aware that if you are joining two pieces of RF cable, you will lose huge amounts of signal strength! =) Cheers, Gavin. I used the following command line: > ./dvbstream -o -ps -qam 16 -cr 3_4 -f 537833 201 202 > tmf.mpg > > Output: > Streaming 2 streams > Videostream: ASPECT: 4:3 Size = 720x576 FRate: 25 fps BRate: 8.00 > Mbit/s > Audiostream: Layer: 2 BRate: 192 kb/s Freq: 48.0 kHz > > > Now since I don't know about these extra fields (qam and cr), could it > be this frequency has different settings to say BBC's? > > > , sorry to jump back in the thread, > > but I notice > > your channels.conf is showing the same as mine in that there are no > > entries for the Sky and UKHistory channels. > > > > FYI these are:- > > Sky News (TV):578166:V:0:27500:101:102,104:0:0:22080 > > Sky Spts News (TV):578166:V:0:27500:201:202,204:0:0:22144 > > Sky Travel (TV):578166:V:0:27500:301:302,304:0:0:22208 > > UKHistory (TV):578166:V:0:27500:401:402,404:0:0:22272 > > > > I have been assuming this is due to a bad signal, although > > usually manage > > to get a lock, but are others also seeing this? > > I can't get a lock on those either. Not too bothered about those > channels, but the more the merrier :) > > Andy. -- Info: To unsubscribe send a mail to [EMAIL PROTECTED] with "unsubscribe linux-dvb" as subject.
