[mythtv-users] Internal DVD player incorrectly detects video scan (interlacing)

[Matt Doran]

Matt Doran wrote:
> Hi Stanley,
>
> I don't think this is a telecine issue.  I'm in Australia, so my DVDs 
> are mostly PAL.   However, one DVD I can reproduce the problem on is a 
> "West Wing" import ... so I'm not sure of the standard it's using.  The 
> other was a DVD I rented and have returned ... but would have been PAL.
>
> I've added "ivtc" to my custom filters, but it hasn't had any effect.  I 
> haven't seen the line "turning on inverse telecine filter" on stderr 
> (which I can see in the code) so I don't think it's switched on.  Any 
> way that I can confirm?
>
> I've attached the output of 2 -v playback for two different examples.  
> They both show interlacing is used in the startup sequence, the first 
> one switches to progressive when I press play, the second switches to 
> progressive when I go to the "Episodes" submenu even though it has no 
> video content and nothing is playing.
>
> Time sequence for frontend-play1.log
>
>     * 20:1 7:40 - start dvd, playing startup sequence.  Startup sequence
>       is interlaced, and plays fine.
>     * 20:18:21 - pressed play once startup completed.  Changes to
>       progressive, and looks awful
>     * 20:18:50 - Manually change video sync to "Interlaced".  Looks
>       fine  again
>
>
> Time sequence for frontend-play2.log
>
>     * 20:23:35 - start dvd, playing startup sequence.  Startup sequence
>       is interlaced, and plays fine.
>     * 20:24:16 - selected the "Episode" menu.  Changes to progressive,
>       even though there is no video content.
>     * 20:18:21 - select an episode to play.  Still in progressive mode,
>       looks awful
>     * 20:18:50 - Manually change video sync to "Interlaced".  Looks fine
>       again
>
>
> What do you think?  It definitely seems to be detecting the progressive 
> frames incorrectly.   I'm happy to help in anyway and provide any info 
> that could be of assistance.
>
> (I'm running trunk r13509, and can easily test patches and/or recompile 
> if necessary.)
>
>   
oops, forgot to attach the logs.
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