[mythtv] DVB

[matt jarvis]

On Tue, 2003-11-11 at 20:37, Steve Davies wrote:
> matt jarvis wrote:
> 
> [snip]
> > 
> > 2. When switching between channels on different muxes, I get glitchy
> > video and audio, with flash frames and even the OSD glitching. This
> > sometimes used to happen in recordings with the old code, but not in
> > livetv. If I switch between channels again, it is sometimes possible to
> > stop this.
> > 
> > 3. I get some strange log messages when changing channels :
> > 
> > Audiostream: Layer: 2  BRate: 256 kb/s  Freq: 48.0 kHz
> > Videostream: ASPECT: 16:9  Size = 720x576  FRate: 25 fps  BRate: 6.50
> > Mbit/s
> > 2003-11-10 19:32:10 DVB#0 Setting KeyFrameDist to 10
> > 2003-11-10 19:32:20 DVB#0 WARNING - Your frequency setting (481833330)
> > is out of range. (min/max:0/0)
> > 2003-11-10 19:32:20 DVB#0 WARNING - Status: NO LOCK!
> > 2003-11-10 19:32:21 DVB#0 WARNING - Transport Stream Continuity Error.
> > 2003-11-10 19:32:21 DVB#0 WARNING - Transport Stream Continuity Error.
> > Videostream: ASPECT: 16:9  Size = 704x576  FRate: 25 fps  BRate: 4.00
> > Mbit/s
> > Audiostream: Layer: 1  BRate: 64 kb/s  Freq: 32.0 kHz
> > 2003-11-10 19:32:22 DVB#0 Setting KeyFrameDist to 12
> > 2003-11-10 19:32:33 DVB#0 WARNING - Unsupported inversion option 'auto',
> > falling back to 'off'
> > 2003-11-10 19:32:33 DVB#0 WARNING - Your frequency setting (505833330)
> > is out of range. (min/max:0/0)
> > 2003-11-10 19:32:33 DVB#0 WARNING - Status: NO LOCK!
> > 2003-11-10 19:32:33 DVB#0 WARNING - Transport Stream Continuity Error.
> > 2003-11-10 19:32:33 DVB#0 WARNING - Transport Stream Continuity Error.
> > Videostream: ASPECT: 16:9  Size = 720x576  FRate: 25 fps  BRate: 6.50
> > Mbit/s
> > 
> > The NO LOCK messages are particularly strange,as it is definitely tuning
> > the channel.
> > 
> 
> Okay,
> 
> I've exchanged some info with Matt off-list, and have re-built my DVB setup 
> clean, so I can test this properly. I have a similar environment to Matt, and 
> am now seeing the same problem as above.
> 
> I do NOT see the frequency setting message, but everything else is basically 
> identical. Stuttery audio and video output, and even when it is smooth, the 
> audio is lagged. I THINK that the stuttering only happens on qam_64 muxes, and 
> the qam_16 sources are all perfect, and lip-synched. This may not be significant.
> 
> I also noticed that if a problem channel is displayed first (straight from the 
> menu) it works okay, but if I change to it from another channel, chances are 
> that it will appear stuttery.
> 
> Regards,
> Steve

Yep, that's exactly what I'm seeing. It's only in switching channels
that you start to get glitches, and only across muxes ( although that
also coincides with change from qam_16 to qam_64 in UK ). May well be a
configuration issue though - I'm using Ed Wildgoose's settings, maybe Ed
can confirm if he sees any of this with latest cvs ? I think he has the
same Nova-T as Steve, with the Philips frontend, and he's on the same
transmitter I think ...


Matt