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| Problems with recording SBS Tour de France http://forum.linhes.org/viewtopic.php?f=6&t=18574 |
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| Author: | nicom [ Thu Jul 17, 2008 6:22 pm ] |
| Post subject: | Problems with recording SBS Tour de France |
My machine has been working successfully for about 1 year now apart from the occasions freeze during playback. Recently I have been having problems with trying to record the daily Tour de France broadcast on SBS each night. I have had a number of successful attempts but have had 2 occurrences of premature stopping and 2 occurrences very short, highly pixelated noise on screen. I checked the /var/log/mythtv/mythbackend.log after these events. For both cases I get lots of messages like Code: [mpeg2video @ 0xb725f4a8]ac-tex damaged at 15 3 The funny thing is that on one occasion another program was recording on another channel. I read another thread which indicated it could be a hard disk issue and suggested fsck. I forced a fsck yesterday but it still did not worked. Yesterday I also checked mysql for errors and could not find anything.
[mpeg2video @ 0xb725f4a8]invalid mb type in P frame at 5 35 [mpeg2video @ 0xb725f4a8]Warning MVs not available It is funny it is so specific to this TV program. Are any other Aussies having problems with this broadcast? Can someone suggest a possible problem with my machine? |
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| Author: | arnie [ Thu Jul 17, 2008 7:22 pm ] |
| Post subject: | |
I wouldn't be worried about your machine if I were you. Here in Perth, we'll get SBS clear as a bell one day and can't lock the signal the next. The symptoms you describe sound like the same sort of signal issues I was getting when I recorded Mythbusters. I have no idea why SBS's transmission is so flakey. I thought it was my antenna at first, but I was getting >90% signal strength from the other channels, including Channel 31 on UHF. Then after 10:00pm, SBS jumped to 87% signal strength. My suggestion is, if you have Foxtel, record SBS off channel 104. If not, I sympathise. |
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| Author: | jbman [ Thu Jul 17, 2008 9:46 pm ] |
| Post subject: | |
I totally agree, i can't get SBS at all on Digital via a DVT card or my tv tuner. The digital signal is very weak here. |
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| Author: | nicom [ Fri Jul 18, 2008 2:45 am ] |
| Post subject: | |
Thanks for that guys. Unfortunately I don't have foxtel nor an analogue card so I guess I will just have to hope. I do notice that the signal strength in my set top box is better (~90)% than I get from the card in my Myth box (65%). |
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| Author: | arnie [ Mon Jul 21, 2008 9:10 pm ] |
| Post subject: | |
Something that might help is an antenna amplifier. I cheaped out and got a 2 output mains powered amp from JayCar ($49) that I keep behind my TV. I'm too lazy to install a masthead amp. 
That helped increase the signal strength to about 65% and has cut down the number of times I get no signal on SBS. |
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| Author: | nicom [ Thu Jul 24, 2008 10:25 pm ] |
| Post subject: | What is BE Number? |
I have managed to pin-point my particular problem to my second tuner card. Recording or watching live from card 1 is fine but card 2 will not pick-up the SBS channel adequately. This explains why the problem was intermittent. The problem could be the coax patch lead between the cards which is a home made special but it is funny it only effects the SBS channel and SBS HD. With both cards the signal strengths and S/N ratios are similar for all channels (45% and 4.7 dB respectively) but when I try SBS through card 2 I get the same values but the BE number is huge (65535) whereas all others are around 0. What does this number mean? Before I replace the coax patch lead I would like to understand what's wrong. |
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