linux-dvb Digest, Vol 41, Issue 93
A message that is not in the archive (sent off-list or not yet received): [email protected]
I can't say. I have only tested this with VLC, which seems to report errors mostly for the transport stream (libdvbpsi) and not the video decoding itself (ffmpeg). However I am not sure about this, I am unable to draw clear conclusions from VLC debugging messages.
I have recorded/dumped a few seconds for each of the two services (Astra HD Promo, Anixe HD). Playing back the files with VLC does give a slightly better result, i.e. I do get to see some frames of the video, when I wouldn't be able to see any while streaming. And it looks like Anixe HD is slightly better than Astra HD Promo, but that just may be a coincidence. However VLC crashes again eventually. Here are some of the relevant messages logged (just a sample):
libdvbpsi error (PSI decoder): TS discontinuity (received 1, expected
0) for PID 0
libdvbpsi error (PSI decoder): TS duplicate (received 12, expected 13) for PID 100
No accelerated IMDCT transform found
libdvbpsi error (misc PSI): Bad CRC_32 (0x055e9456) !!! libdvbpsi error (misc PSI): Bad CRC_32 (0x25f13ddd) !!! [00000381] ffmpeg decoder error: more than 5 seconds of late video -> dropping frame (computer too slow ?)
and then...
24/06/2008 1:39:09 ΜΜ com.apple.launchd[316] ([0x0-0x1f31f3].org.videolan.vlc[5229]) Exited abnormally: Bus error
I have published these short clips if you want to try them out yourself:
http://www.admin.grnet.gr/pub/zmousm/astrahd.ts
http://www.admin.grnet.gr/pub/zmousm/anixehd.ts
If you could suggest the necessary ffmpeg syntax, I could try it out.
I seem to have trouble with both these services on this transponder, while there's at least one other report that Anixe HD is OK. So I'm wondering if it could be the case that my LNB/receiver/dish positioning combination is simply not good (sensitive?) enough for this specific transponder?
Thanks,
Z.
Quoted 98 lines · On 23 Ιουν 2008, at 9:58 ΜΜ, [email protected] wrote:
have you the same problem as I described in vdr list ?
http://linuxtv.org/pipermail/vdr/2008-May/016766.htmlQuoted 92 lines
I have a Hauppauge HVR-4000. My system is running the latest Debian
testing kernel (2.6.24-7) plus drivers from http://linuxtv.org/hg/v4l-dvb/rev/127f67dea087
patched with http://dev.kewl.org/hauppauge/experimental/mfe-s2-7285.diff
, as per the wiki notes (mostly): http://www.linuxtv.org/wiki/index.php/Hauppauge_WinTV-HVR-4000#DriversI have no problem tuning with http://dev.kewl.org/hauppauge/experimental/szap-meow.tgz
to any DVB-S or DVB-S2 QPSK/8PSK transponder I have tried. However
there seems to be a problem with the reception of the Astra HD Promo service at 11914500H on Astra1H. I don't know what the problem is exactly, since tuning seems to work:tvbox2:~# szap-meow -r -p -c diseqc2_Astra-19.2E -m 1 -e 9 -o 2 -w 2 ASTRAHDPROMO reading channels from file 'diseqc2_Astra-19.2E' zapping to 1 'ASTRAHDPROMO': sat 1, frequency = 11914 MHz H, symbolrate 27500000, vpid = 0x04ff, apid = 0x0503 sid = 0x0083 using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0' status 1f | signal fd40 | snr 6199 | ber 00000000 | unc 00000000 | FE_HAS_LOCK status 1f | signal fe80 | snr 64cd | ber 00000000 | unc 00000000 | FE_HAS_LOCK status 1f | signal fe40 | snr 6333 | ber 00000000 | unc 00000000 | FE_HAS_LOCK status 1f | signal fd80 | snr 6333 | ber 00000000 | unc 00000000 | FE_HAS_LOCK status 1f | signal fe40 | snr 6199 | ber 00000000 | unc 00000000 | FE_HAS_LOCK status 1f | signal fe80 | snr 6000 | ber 00000000 | unc 00000000 | FE_HAS_LOCKThere is an occasional ber > 0 and the snr is not exceptional, but there are other services with much worse snr/ber that have no problem whatsoever.
I don't have vdr, mythtv etc. applications installed on the system. I test by redirecting the output of vdr0 to a file, to play back the TS later, or by piping to VLC, to stream on the lan. VLC clearly shows there is a problem because there is always a flood of messages from libdvbpsi on stderr like Bad
CRC_32, TS discontinuity, invalid section, PSI section too long etc. I'm not that confident about VLC debugging, but I know for sure this doesn't happen when the service works right.I've tried tuning to freq 11915 as well as using different values for roll-off (-o) and pilot (-w). It doesn't make any difference (-w 1 doesn't work if I remember right).
The same thing happens with the Anixe HD service, also on the same transponder.
I have no problem tuning to other transponders on Astra1H that carry a
mix of scrambled+FTA or FTA-only services, like 11875500H or 12051000V, but they are DVB-S. I also have no problem tuning to DVB- S2
transponders on other LNBs (I have a 4x1 diseqc v1.0 switch with this LNB in position AB), but I could not test any other such transponders with QPSK modulation.I'm wondering what could be the cause of this problem:
At first I thought the problem could be that the transponder carries scrambled services as well, but that does not seem to be the case. Then I thought the problem could be the H.264 video payload of the video ES of these services, confusing VLC, hence the many error messages, but I've been able to stream/play at least one other "similar" service (Luxe TV) with no particular problems.
Finally I reconsidered the "saga" of the HVR-4000 driver, and started thinking that perhaps I should have gone with one of the other implementations in the first place. I had this card setup a few months
ago with 2.6.24 and multiproto, but I had to redo the installation and
this time I wanted to try to stick with the official linuxtv.org tree.
Could this be the reason? If so, however, I suppose tuning wouldn't work at all, right?Am I missing something here? Any ideas/suggestions you may have are more than welcome...
Thanks,
Z.PS: Somewhat off-topic question, but here goes anyway, since I have not found a definitive answer: Is there any device with DVB-S2 *and* CI and driver support for both? I have noticed that TT-budget S2-3200
+ CI could possibly be the one, but I believe the CI part still doesn't work.
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