[mythtv-users] Zero byte recordings... sometimes.

David A. Mason damason at redshift.com
Mon Nov 17 13:07:16 EST 2003


I find that this happens to me when I boot from a 2.4.22x kernel I've got
installed; compiling the ivtv driver against that kernel's v4l2 headers
rather than the v4l headers of earlier kernels leads to periodic 0-byte
recordings.

There is some discussion of this on the ivtv mailing list, and, according to
that list, the problem might finally be solved in the latest version of the
driver:

http://www.kernel.org/pub/linux/kernel/people/axboe/ivtv/

I have yet to try it, but I hope to soon. My 2.4.22x kernel has preemptive
patches, and I'm hoping to eek a little more performance out of my P3-500.

DAM

-----Original Message-----
From: mythtv-users-bounces at mythtv.org
[mailto:mythtv-users-bounces at mythtv.org] On Behalf Of James S. White
Sent: Sunday, November 16, 2003 5:31 PM
To: mythtv-users at mythtv.org
Subject: [mythtv-users] Zero byte recordings... sometimes.


I have a Dual-PVR-250 Pundit System Running debian/unstable
I am running mythtv checked out from CVS on Nov 12th @ 1400 GMT The ivtv
driver I'm using was checked out shortly before.

cat /dev/video0 > test0.mpg
cat /dev/video1 > test1.mpg

work as expected, but periodically mythtv is producing 0 byte recordings.

-rw-r--r--    1 mythtv   mythtv          0 Nov 16 19:00
1002_20031116190000_2003
1116193000.nuv

I cant see what might be causing this: any Ideas?

/var/log/mythtv/mythbackend.log:
[snip]
2003-11-16 18:59:31 Started recording "Charmed" on channel: 1016 on cardid:
2, s ourceid 1 2003-11-16 18:59:31 Changing from None to RecordingOnly Sent
0 to device cable Sent 1 to device cable Sent 6 to device cable 2003-11-16
19:00:00 Changing from RecordingOnly to None 2003-11-16 19:00:00 Found
changes in the todo list. 2003-11-16 19:00:03 Started recording "The
Simpsons" on channel: 1002 on cardid:  1, sourceid 1 2003-11-16 19:00:03
Changing from None to RecordingOnly Input #0, mpeg, from
'/var/lib/mythtv/1003_20031116180000_20031116190000.nuv':
  Stream #0.0: Video: mpeg1video, 480x480, 29.97 fps
  Stream #0.1: Audio: mp2, 48000 Hz, stereo, 384 kb/s
Sent 0 to device cable
Sent 0 to device cable
Sent 2 to device cable
2003-11-16 19:11:01 MainServer::HandleAnnounce Playback 2003-11-16 19:11:01
adding: tuxvo as a player 0 [end]

--------------------------------------------------------------
James S. White                      GAPS Incorporated
james at jameswhite.org                Electrical Engineer - Etc.
http://www.jameswhite.org           Caffeine is my anti-drug.
--------------------------------------------------------------
"If you think education is expensive, try ignorance" - Derek Bok





More information about the mythtv-users mailing list