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[linux-dvb] Re: dvbtune / Nova-T unable to lock on frequencyproblems



Hi Holger,

Holger Waechtler wrote:

looks fine, your card tuned and everything is running, so what exactly is your problem?
Two problems, both related to the fact that the instructions I have seen for using the Nova-T to watch TV on the computer have relied on dvbtune/dvbstream (piping to mplayer):

1. dvbtune -i gives me no information ("Nothing to read from fd_pat...")

2. Piping dvbstream to mplayer does not even bring up the mplayer window. If I use -nocache with mplayer, I get:

Playing -
Reading from stdin...
polling....
Getting frontend event
FE_STATUS: FE_HAS_SIGNAL FE_HAS_LOCK FE_HAS_CARRIER FE_HAS_VITERBI FE_HAS_SYNC
Bit error rate: 85
Signal strength: 12079
SNR: 59367
FE_STATUS: FE_HAS_SIGNAL FE_HAS_LOCK FE_HAS_CARRIER FE_HAS_VITERBI FE_HAS_SYNC
Output to stdout
Streaming 2 streams

and then nothing. If I don't use -nocache, I get something similar, followed by:

Cache fill: 0.00% (0 bytes)

Which never moves past this point. So it seems that dvbstream is not actually streaming anything successfully to stdout, despite saying that it is.

In order to record your stream you could for example use 'tzap -r':

$ ./tzap -r BBC-1
[and let it run forever...]

now tap in another console:

$ cat /dev/dvb/adapter0/dvr0 > /tmp/recording.ts
[recording.ts contains the your Transport Stream with Audio and Video data]
I've tried this, and recording.ts remains an empty file. After 10 minutes, it still contained 0 bytes. This seems consistent with the problem of piping the output of dvbstream to mplayer. Basically, nothing seems to be coming out of this card (although it did under Windows).

if you want to decode the stream to your X screen try:

$ cat /tmp/recording.ts | ts2ps 0 0 | mplayer -
[ts2ps is part of the mpegtools, you get it from http://www.metzlerbros.org/dvb/index.html]
[play with the mplayer options in order to get it decoded smoothly, I use something like 'mplayer -ao oss -vo xv -vfm ffmpeg -framdrop -vop lavcdeint - ', read the mplayer manpage for details]
I'd love to have a play, but I only have an empty file to decode :-(

well, enought testing - from now on you probably want to watch out for a more comfortable solution and add MPEG-software-decoding support to VDR or Enigma...
I am not planning to hook this up to a TV, so I think VDR is not the right solution. I have not heard of Enigma. I will read up about it.

I'd love to move to a more comfortable solution, but I don't think my card is going to let me. Any more suggestions?

Cheers,

Bruno



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