[mythtv-users] Unable to get video playback in MythTV

Tue Oct 12 22:15:31 UTC 2004

On Tue, 12 Oct 2004 17:54:50 -0400, Brian Matthew Sperlongano
<zelonewolf at gmail.com> wrote:
> Hi Jason,
> 
> Yes, it does sound like we have the same issue!.  I'm also using the
> saa7134 driver to the same effect.
> 
> Actually, I had the audio device set to /dev/dsp, but I changed it to
> /dev/dsp1 to match the dsp_nr= line in modprobe.conf.  Anyhow, I tried
> it again, and still, it INSISTED on trying to open /dev/dsp and not
> /dev/dsp1.  This is very interesting.  I read somewhere that it may be
> better to use ALSA instead of OSS and that may solve the problem...any
> ideas?
> 
> 
> 
> On Tue, 12 Oct 2004 17:04:24 -0400, Jason Slaughter <jason at slaughter.com> wrote:
> > I am having almost exactly the same problem, so I would be very curious to
> > hear the solution. My card works fine in tvtime and xawtv as well.
> >
> > One thing I have noticed (which may not be the case for you) is that my
> > saa7133 TV card (using the saa7134 driver with oss=1 as an option) is
> > creating the OSS device "/dev/dsp1" and not "/dev/dsp". I have configured, in
> > mythtv-setup, my capture card to use "/dev/dsp1" but *every* time I load the
> > MythTV "Watch TV" plugin it has the line: "Opening OSS audio device
> > '/dev/dsp'." It looks like the configuration in the database (cleary
> > specifying "/dev/dsp1") is not being read. I've tried with "/dev/dsp2" and
> > others as well, but MythTV insists on trying only "/dev/dsp," for both live
> > TV and scheduled recording.
> >
> > Is it possible that you are having the same issue? Or perhaps they're
> > completely unrelated? At any rate, does anybody know how to make MythTV read
> > its configuration database properly?
> >
> >
> >
> > On Tuesday 12 October 2004 16:33, Brian Matthew Sperlongano wrote:
> > > Okay, I am SOOO close to getting this thing working now! I have
> > > perfect video and audio in tvtime, and I can schedule and record shows
> > > in myth (or at least presumably - the .nuv files show up in the
> > > storage directory).
> > >
> > > The only problem is that I have NO video playback in mythTV! Thus, I
> > > cannot watch live tv or recorded shows.
> > >
> > > Does anyone have any suggestions as to what I can try? I've been
> > > wracking my brain on this one.
> > >
> > > I'm using myth 0.16 w/256megs ram and a Celeron 2.4GHz.
> > >
> > > The output of mythfrontend is as follows:
> > >
> > > 2004-10-10 20:56:56 Using protocol version 8
> > > 2004-10-10 20:56:56 Using protocol version 8
> > > 2004-10-10 20:57:15 Using protocol version 8
> > > 2004-10-10 20:57:21 taking too long to be allowed to read..
> > > 2004-10-10 20:57:26 taking too long to be allowed to read..
> > > 2004-10-10 20:57:26 RemoteFile::Read() failed in RingBuffer::safe_read().
> > > 2004-10-10 20:57:26 Opening OSS audio device '/dev/dsp'.
> > > 2004-10-10 20:57:26 Audio fragment size: 4096
> > > 2004-10-10 20:57:26 Using XV port 56
> > > 2004-10-10 20:57:26 Changing from None to WatchingLiveTV
> > > 2004-10-10 20:57:26 Audio buffer overflow, audio data lost!
> > > 2004-10-10 20:57:26 Audio buffer overflow, audio data lost!
> > > ---repeats for a few pages----
> > > 2004-10-10 20:57:26 Audio buffer overflow, audio data lost!
> > > 2004-10-10 20:57:26 Audio buffer overflow, audio data lost!
> > > 2004-10-10 20:57:26 Audio buffer overflow, audio data lost!
> > > 2004-10-10 20:57:29 Waited 2 seconds for data to become available,
> > > waiting again...
> > > 2004-10-10 20:57:31 Waited 2 seconds for data to become available,
> > > waiting again...
> > > 2004-10-10 20:57:33 Waited too long for ringbuffer pause..
> > > 2004-10-10 20:57:34 Waited too long for ringbuffer pause..
> > > 2004-10-10 20:57:35 Waited too long for ringbuffer pause..
> > > 2004-10-10 20:57:36 Waited too long for ringbuffer pause..
> > > 2004-10-10 20:57:36 RemoteFile::Read() failed in RingBuffer::safe_read().
> > > 2004-10-10 20:57:38 Changing from WatchingLiveTV to None
> >
> > _______________________________________________
> > mythtv-users mailing list
> > mythtv-users at mythtv.org
> > http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
> >
> 

Just to see what would happen, I disabled the audio device /dev/dsp
entirely, and below is the output that I got.  When I did that, it
popped up a message saying that the audio device didn't work and asked
if I wanted to continue without audio.  I chose "yes" and then the
screen blinked for a second and then went back to mythfrontend.

log:

[root at localhost dev]# mythfrontend
2004-10-12 18:11:26 mythfrontend version: 0.15.20040525-1 www.mythtv.org
2004-10-12 18:11:26 Enabled verbose msgs : important general
mythtv: could not connect to socket
mythtv: No such file or directory
lirc_init failed for mythtv, see preceding messages
2004-10-12 18:11:27 Registering Internal as a media playback plugin.
2004-10-12 18:11:27 Registering MythDVD DVD Media Handler as a media handler
2004-10-12 18:11:27 Registering MythDVD VCD Media Handler as a media handler
2004-10-12 18:11:30 Registering MythMusic Media Handler as a media handler
2004-10-12 18:11:42 All Programs
2004-10-12 18:11:42 Connecting to backend server: 127.0.0.1:6543 (try 1 of 5)
2004-10-12 18:11:42 Using protocol version 8
2004-10-12 18:11:43 Using protocol version 8
2004-10-12 18:11:45 Opening OSS audio device '/dev/dsp'.
2004-10-12 18:11:45 Unable to set audio device (/dev/dsp) to 32000 kHz
/ 16 bits / 2 channels
2004-10-12 18:11:50 Using XV port 56
2004-10-12 18:11:50 Changing from None to WatchingPreRecorded
2004-10-12 18:11:51 Changing from WatchingPreRecorded to None
2004-10-12 18:11:51 Changing from None to None