[mythtv-users] 2 DVB Problems

Aike Terjung Aike at terjung.net
Mon Dec 15 04:35:17 EST 2003


Hello,

i have 2 Problems with DVB Recording. 
My configuration:
Debain Woody with 2.6.0-test11 kernel.
Technotrend Budget DVB-C Card, Hauppauge bttv.

1. If i start my Computer and after some time like 30 minutes a recording from 
my DVB-C Card starts, the recorded file has a size of 0, and in the backend 
log i can read this:

2003-12-15 09:31:05 Started recording "Wissenschaft: Schwerpunkt
" on channel: 1040 on cardid: 2, sourceid 2
2003-12-15 09:31:05 Started recording "Wissenschaft: Schwerpunkt
" on channel: 1040 on cardid: 2, sourceid 2
2003-12-15 09:31:05 DVB#0 WARNING - Invalid fec_inner parameter '(null)', 
falling back to 'auto'.
2003-12-15 09:31:05 Changing from None to RecordingOnly
2003-12-15 09:31:05 DVB#0 Recorder: Card opened successfully.
2003-12-15 09:31:06 DVB#0 WARNING - No data from card in 1 second.

the last message is repeated every second until the endtime of the recording.

If i restart the Computer, after the reboot the recording is started again, 
now showing this in the backend log:
2003-12-15 09:42:23 DVB#0 Using DVB card 0, with frontend VES1820 based DVB-C 
frontend.
2003-12-15 09:42:23 DVB#0 WARNING - Invalid fec_inner parameter '(null)', 
falling back to 'auto'.
2003-12-15 09:42:24 Enabled verbose msgs : important general
2003-12-15 09:42:29 Found changes in the todo list.
2003-12-15 09:42:29 Started recording "Wissenschaft: Schwerpunkt
" on channel: 1040 on cardid: 2, sourceid 2
2003-12-15 09:42:29 Started recording "Wissenschaft: Schwerpunkt
" on channel: 1040 on cardid: 2, sourceid 2
2003-12-15 09:42:29 DVB#0 WARNING - Invalid fec_inner parameter '(null)', 
falling back to 'auto'.
2003-12-15 09:42:29 Changing from None to RecordingOnly
2003-12-15 09:42:29 DVB#0 Recorder: Card opened successfully.
2003-12-15 09:42:29 DVB#0 WARNING - Transport Stream Continuity Error.
2003-12-15 09:42:29 DVB#0 WARNING - Transport Stream Continuity Error.
Audiostream: Layer: 2  BRate: 192 kb/s  Freq: 48.0 kHz
Videostream: ASPECT: 4:3  Size = 720x576  FRate: 25 fps  BRate: 15.00 Mbit/s
2003-12-15 09:42:30 DVB#0 Setting KeyFrameDist to 12

Like it should be, i think.

Now the recording works right. 
I can reproduce this every day and this makes DVB recording nearly useless.
I am Using the 2.6.0-test11 kernel and the kernels own DVB drivers, so i 
thougt this could be a driver problem, but i have no problems when recording 
with czap and ts2ps. This problem is only produced by mythTV.

I hope that somewone help me out with this.

The second problem occures when i try to make a DVD from a sucsessfull DVB 
Recording. i do it in this way.
1. use PVAstrumento with wine to repair possible errors in the movie. As the 
result i get an .mpa and an .mpv file.
2. I use mplex -f8 -o test.mpeg test1.mpv test1.mpa to remux the video for DVD 
Video.
3. dvdauthor -o testdvd1/ -t test.mpeg
4. dvdauthor -o testdvd1/ -T

then i burn the resulting files to a DVD under Windows with Nero.

Playing the DVD with my Standalone DVD-Player results in a green Picture where 
only the canges were shown.
So i think there must be a problem with the keyframes?
Doing the same with an mpeg file produced with ts2ps makes a working DVD.

thank you for reading this,

cu Aike Terjung





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