[mythtv] DVB

[Steve Davies]

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

-- 
Steve Davies                   steve at one47.co.uk

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