[mythtv-users] No audio in live TV and corrupted recordings with second SAA7134 card.

Dylan Walkden dylan_walkden at hotmail.com
Tue Feb 7 11:15:28 UTC 2006


My MythTV box was originally using a Compro Videomate TV Gold+ (saa7134
based) as it's sole capture card, and it worked very well. Now most of the
local TV stations are broadcasting in digital so I invested in a Divco
FusionHDTV DVB-T+ card as an upgrade. However one of the channels has yet to
move over to digital so I have kept the older Compro card as a second source
solely for that channel.
	This is where the fun and games begin, the Divco card is working
perfectly, no hitches. The Compro will produce video when viewing live TV
but no sound, when recording a scheduled program the recording still has no
sound and the video is corrupt. It looks almost like the tuning is off
slightly, there is a pattern that could be scan lines wrapping round the
frame (if that makes any sense) but there's nothing recognizable. If I use
xawtv to view the Compro and type aplay /dev/dsp I get video and sound,
though the sound is very poor quality due to aplay playing it back at 8bit.
I also tried turning on the oss=1 option for the saa7134 module and pointing
Mythtv at /dev/dsp1 but got the same results.

The MythTV box is a P4 3GHz with hyperthreading enabled, 512MB RAM, and
using the onboard intel8x0 AC97 soundcard for recording and playback.

Here is a snippet from my mythbackend.log showing the Compro card (cardid 2)
recording the Simpsons:

2006-02-03 18:00:02.326 Started recording "The Simpsons" on channel: 1015 on
cardid: 2, sourceid 2
2006-02-03 18:00:02.333 scheduler: Schedule Change
2006-02-03 18:00:02.340 Started recording "Doctor Who" on channel: 1005 on
cardid: 1, sourceid 1
2006-02-03 18:00:02.345 New DB connection, total: 4
2006-02-03 18:00:02.363 New DB connection, total: 5
2006-02-03 18:00:02.546 Changing from None to RecordingOnly
[mpeg4 @ 0x4f8894]removing common factors from framerate
2006-02-03 18:00:02.649 DVB#0 Multiplex Locked
strange error flushing buffer ...
2006-02-03 18:00:03.765 DVB#0 Successfully tuned to channel 2.
2006-02-03 18:00:03.834 Changing from None to RecordingOnly
2006-02-03 18:00:03.879 DVB#0 Recorder: Card opened successfully (using TS
mode).
2006-02-03 18:00:03.914 DVB#0 Data read from DMX - This is for debugging
with transform.c
2006-02-03 18:30:00.030 Finished recording The Simpsons on channel: 1015
2006-02-03 18:30:00.106 scheduler: Last message repeated 1 times
2006-02-03 18:30:00.124 scheduler: Finished recording
2006-02-03 18:30:00.148 Changing from RecordingOnly to None
2006-02-03 18:30:00.151 Reschedule requested for id 0.
2006-02-03 18:30:00.314 Scheduled 13 items in 0.2 = 0.03 match + 0.14 place
2006-02-03 18:30:00.338 scheduler: Scheduled items
2006-02-03 18:30:30.787 Starting Commercial Flagging for "The Simpsons"
recorded from channel 1015 at Fri Feb 3 18:00:00 2006.
2006-02-03 18:30:30.803 commflag: Commercial Flagging Starting
2006-02-03 18:30:33.192 New DB connection, total: 1
2006-02-03 18:30:33.297 New DB connection, total: 2

2006-02-03 18:46:46.817 commflag: Commercial Flagging Finished
2006-02-03 18:46:46.831 Finished, 6 break(s) found.
2006-02-03 19:05:00.003 Finished recording Doctor Who on channel: 1005
2006-02-03 19:05:00.049 scheduler: Finished recording
2006-02-03 19:05:00.073 Changing from RecordingOnly to None
2006-02-03 19:05:00.073 Reschedule requested for id 0.
2006-02-03 19:05:00.104 Closing DVB recorder
2006-02-03 19:05:00.214 Scheduled 13 items in 0.1 = 0.03 match + 0.11 place
2006-02-03 19:05:00.233 scheduler: Scheduled items
2006-02-03 19:05:33.030 New DB connection, total: 2




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