[mythtv] Corrupt analog recordings

Torbjörn Jansson torbjorn.jansson at mbox200.swipnet.se
Sun Aug 13 20:32:52 UTC 2006


For a few weeks now i've been having corrupt recordings from my analog card.
This only happends for some of the recordings and i have not found any
patern to it.

A corrupt recording have perfect audio but the video looks like a blocky
mess, sometimes a more or less corrupted frame is visibel.

One thing i've noticed in the backend log is this:

2006-08-13 19:05:02.189 TVRec(1): Changing from None to RecordingOnly
2006-08-13 19:05:02.202 TVRec(1): HW Tuner: 1->1
v4l2: unable to handle these sampling parameters
strange error flushing buffer ... 
2006-08-13 19:05:02.296 Started recording: Förhäxad "Del 174 säsong 8":
channel 1002 on cardid 1, sourceid 1

The error "v4l2: unable to handle these sampling parameters" appears on all
bad recordings i've checked so i think this have something to do with the
problem.

But i don't know what that error means and how to fix it.
Any ideas on what's going on? Or some tips/hints?



The commflagger is not happy at all with the bad recordings and outputs
loads of stuff like:

[mpeg4 @ 0xb725d384]hmm, seems the headers are not complete, trying to guess
time_increment_bits
[mpeg4 @ 0xb725d384]my guess is 1 bits ;)
Marker bit missing before time_increment
[mpeg4 @ 0xb725d384]hmm, seems the headers are not complete, trying to guess
time_increment_bits
[mpeg4 @ 0xb725d384]my guess is 2 bits ;)
[mpeg4 @ 0xb725d384]ac-tex damaged at 4 0
[mpeg4 @ 0xb725d384]Error at MB: 4



Backend version:

# mythbackend --version
Library API version: 0.19.20060708-1
Source code version: 10752M
Options compiled in:
 linux debug using_lmsensors using_v4l using_oss using_alsa using_arts
using_ivtv using_dbox2 using_hdhr using_ip_rec using_freebox using_live
using_joystick_menu using_dvb using_x11 using_xv using_xrandr using_frontend
using_backend



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