On 11/24/2010 03:02 AM, Nico Sabbi wrote:
David Liontooth ha scritto:
On 11/19/2010 11:51 PM, David Liontooth wrote:
I'm using Debian's dvbstream 0.6+cvs20090621-1 to capture video and
closed captioning to file.
If I tune with azap, dvbstream works fine, but I can't get it to
tune on its own.
In the Debian source code, I activated DVB_ATSC by adding -DDVB_ATSC
to CFLAGS in the Makefile.
dvbstream -f 645000000 -qam 256 -v 49 a 52 -o > test.ts
gives me the error "Unknown FE type".
Suggestions? Is this a problem with an API that has changed since
dvbstream's last release?
If I change tune.h to allow DVB API >=3 major instead of just ==3, I
get this (this is a very lightly patched version to allow 8 cards):
# dvbstream -f 621000 -qam 256 -v 8192 -a 8192 -s 6875 -n 10 -o:test.ts
dvbstream v0.7.01 - (C) Dave Chapman 2001-2004
Released under the GPL.
Latest version available from http://dvbtools.sourceforge.net
Open file test.ts
Tuning to 621000 MHz
Using DVB card "Samsung S5H1411 QAM/8VSB Frontend", freq=621000
tuning ATSC to 621000000, modulation=5
Getting frontend status
Event: Frequency: 621000000
Modulation: 5
Bit error rate: 0
Signal strength: 0
SNR: 0
UNC: 0
FE_STATUS: FE_HAS_SIGNAL FE_HAS_LOCK FE_HAS_CARRIER FE_HAS_VITERBI
FE_HAS_SYNC
MAP 0, file test.ts: From -1 secs, To -1 secs, 0 PIDs -
dvbstream will stop after 10 seconds (0 minutes)
Streaming 1 stream
Caught signal 1 - closing cleanly.
So it tries to tune, and succeeds in a manner of speaking -- if I try
to tune to an unavailable frequency, it will fail; here we can see it
locks. However, the Signal strength is zero and the file is empty.
What happened with the ATSC QAM-256 tuning in between DVB API 3.1 and
now? I'm running 2.6.32.5, with DVB API 5.1.
Cheers,
Dave
it's the usual debian idiocy to package only "official releases".
I refuse to release anything, so unless Dave does it you should use a
fresh cvs checkout from sourceforge, where the limitation was removed
years ago.
Hi Nico,
Glad to hear you're around and thanks for responding! The Debian
maintainer is actually using dvbstream_0.6+cvs20090621, which looks to
me like the latest version -- I used
cvs -z3
-d:pserver:anonymous@xxxxxxxxxxxxxxxxxxxxxxxxxxxx:/cvsroot/dvbtools co
-P dvbstream
cvs tune.h still contains the block that restricts the DVB_API to an
outdated version,
#undef DVB_ATSC
#if defined(DVB_API_VERSION_MINOR)
#if DVB_API_VERSION == 3 && DVB_API_VERSION_MINOR >= 1
#define DVB_ATSC 1
#endif
#endif
and tune.c is not different from the Debian tune.c.
Where is the working code for ATSC QAM tuning? I'd be happy to work with
you if you can provide some pointers.
Salve,
Dave
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