[linux-dvb] DVB-C, distortion on some channels.

Jonas Kvinge jonas at jonas.io
Fri Nov 16 15:58:02 CET 2007


Hello,

I have a Technotrend C-1500 card, I am experiencing some
interference/distortion in image and sound on many of the channels, .
when I experience this the mythfrontend dumps lots of errors see below.
The strange thing is that some channels it occurs all the time, while
some channels it occur less often and some channels are entirely fine.
It think the problem is with the channels that are on the same
multiplex, but I am not sure. I'm using kernel 2.6.23 that I built
myself and with the latest v4l-dvb from CVS. Through I have the same
problem with the previous kernel. The Signal Strength shows around 55%.
I am using MythTV but I have the same problem with Kaffeine. To make
sure it wasn't a poor signal that was causing it I tested with the
decoder provider by the cable company and it was fine using that
decoder. Could my card be defective even though some channels fine?

[mpeg2video @ 0xb7241588]skipped MB in I frame at 13 27
[mpeg2video @ 0xb7241588]00 motion_type at 35 26
[mpeg2video @ 0xb7241588]00 motion_type at 35 8
[mpeg2video @ 0xb7241588]invalid cbp at 22 18
[mpeg2video @ 0xb7241588]00 motion_type at 5 15
[mpeg2video @ 0xb7241588]ac-tex damaged at 20 30
[mpeg2video @ 0xb7241588]00 motion_type at 39 8
[mpeg2video @ 0xb7241588]skipped MB in I frame at 35 30
[mpeg2video @ 0xb7241588]skipped MB in I frame at 33 20
[mpeg2video @ 0xb7241588]00 motion_type at 32 6
[mpeg2video @ 0xb7241588]ac-tex damaged at 37 3
[mpeg2video @ 0xb7241588]mb incr damaged
[mpeg2video @ 0xb7241588]ac-tex damaged at 22 19
[mpeg2video @ 0xb7241588]ac-tex damaged at 27 0
[mpeg2video @ 0xb7241588]ac-tex damaged at 24 32
[mpeg2video @ 0xb7241588]00 motion_type at 1 1
[mpeg2video @ 0xb7241588]ac-tex damaged at 1 2
[mpeg2video @ 0xb7241588]ac-tex damaged at 6 3
[mpeg2video @ 0xb7241588]00 motion_type at 4 4
[mpeg2video @ 0xb7241588]00 motion_type at 11 5
[mpeg2video @ 0xb7241588]00 motion_type at 7 6
[mpeg2video @ 0xb7241588]00 motion_type at 30 7
[mpeg2video @ 0xb7241588]00 motion_type at 8 8
[mpeg2video @ 0xb7241588]00 motion_type at 23 9
[mpeg2video @ 0xb7241588]ac-tex damaged at 5 10
[mpeg2video @ 0xb7241588]00 motion_type at 8 11
[mpeg2video @ 0xb7241588]mb incr damaged
[mpeg2video @ 0xb7241588]ac-tex damaged at 12 13
[mpeg2video @ 0xb7241588]ac-tex damaged at 8 14
[mpeg2video @ 0xb7241588]ac-tex damaged at 43 15
[mpeg2video @ 0xb7241588]ac-tex damaged at 12 16
[mpeg2video @ 0xb7241588]00 motion_type at 24 17
[mpeg2video @ 0xb7241588]00 motion_type at 1 18
[mpeg2video @ 0xb7241588]ac-tex damaged at 42 19
[mpeg2video @ 0xb7241588]00 motion_type at 27 20
[mpeg2video @ 0xb7241588]00 motion_type at 6 21
[mpeg2video @ 0xb7241588]00 motion_type at 15 22
[mpeg2video @ 0xb7241588]ac-tex damaged at 5 23
[mpeg2video @ 0xb7241588]00 motion_type at 5 24
[mpeg2video @ 0xb7241588]ac-tex damaged at 2 25
[mpeg2video @ 0xb7241588]ac-tex damaged at 9 26
[mpeg2video @ 0xb7241588]00 motion_type at 5 27
[mpeg2video @ 0xb7241588]ac-tex damaged at 6 28
[mpeg2video @ 0xb7241588]00 motion_type at 25 30
[mpeg2video @ 0xb7241588]00 motion_type at 12 30
[mpeg2video @ 0xb7241588]00 motion_type at 7 31
[mpeg2video @ 0xb7241588]invalid mb type in P Frame at 2 32
[mpeg2video @ 0xb7241588]mb incr damaged
[mpeg2video @ 0xb7241588]00 motion_type at 12 34
[mpeg2video @ 0xb7241588]ac-tex damaged at 9 35
[mpeg2video @ 0xb7241588]00 motion_type at 24 24
[mpeg2video @ 0xb7241588]invalid mb type in P Frame at 28 3
[mpeg2video @ 0xb7241588]00 motion_type at 27 21
[mpeg2video @ 0xb7241588]00 motion_type at 43 4
[mpeg2video @ 0xb7241588]skipped MB in I frame at 41 30
[mpeg2video @ 0xb7241588]00 motion_type at 16 20
[mpeg2video @ 0xb7241588]ac-tex damaged at 30 5
[mpeg2video @ 0xb7241588]ac-tex damaged at 7 5
[mpeg2video @ 0xb7241588]00 motion_type at 27 22





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