[mythtv-users] PBS interlacing not working - Was: Cyberchase and de-interlacing
george_mythusers at mari1938.org
Wed Jun 10 11:24:34 UTC 2009
Justin The Cynical wrote:
> George Mari wrote:
>> What about the Slim profile, as Mike suggested?
> Same deal:
> 2009-06-09 23:02:49.595 XMLParse::LoadTheme using
> 2009-06-09 23:02:53.876 TV: Attempting to change from None to
> 2009-06-09 23:02:54.292 AFD: Opened codec 0x832e4f0, id(MPEG2VIDEO)
> 2009-06-09 23:02:54.292 AFD: codec AC3 has 2 channels
> 2009-06-09 23:02:54.292 AFD: Opened codec 0x82e3580, id(AC3) type(Audio)
> 2009-06-09 23:02:54.292 AFD: codec AC3 has 1 channels
> 2009-06-09 23:02:54.293 AFD: Opened codec 0x82e00b0, id(AC3) type(Audio)
> 2009-06-09 23:02:54.293 AFD: codec AC3 has 1 channels
> 2009-06-09 23:02:54.294 AFD: Opened codec 0x8309050, id(AC3) type(Audio)
> 2009-06-09 23:02:54.294 Opening audio device 'default'. ch 2(2) sr 48000
> 2009-06-09 23:02:54.294 Opening ALSA audio device 'spdif'.
> 2009-06-09 23:02:54.325 Opening audio device 'default'. ch 2(2) sr 48000
> 2009-06-09 23:02:54.325 Opening ALSA audio device 'spdif'.
> 2009-06-09 23:02:54.987 VideoOutputXv: XVideo Adaptor Name: 'NV17 Video
> 2009-06-09 23:02:55.009 OSD Theme Dimensions W: 640 H: 480
> 2009-06-09 23:02:55.233 The realtime priority setting is not enabled.
> 2009-06-09 23:02:55.234 TV: Changing from None to WatchingPreRecorded
> 2009-06-09 23:02:55.333 Video timing method: USleep with busy wait
> 2009-06-09 23:03:18.388 TV: Attempting to change from
> WatchingPreRecorded to None
> 2009-06-09 23:03:18.465 TV: Changing from WatchingPreRecorded to None
>> Another thing to try would be to manually change the Video Scan type
>> while watching the program - press the 'M' key, or equivalent on your
>> remote, scroll to 'Video Scan', and see what Myth detected - either
>> Interlaced or progressive. See what happens if you change it to the
>> other - does the picture change? Or no difference?
> Now, this made a difference. The default option in that menu was
> detect. Manually selecting progressive made no difference, but
> selecting either version of interlaced did so. It didn't look as good
> as what I would expect from a 720 or 480p signal, but it did a lot better.
> Why, I don't know. I'd almost say that the old programming is being
> dumped on the digital side as a 480p program without doing any cleanup,
> if that's possible.
> Or I may be talking out of me bum, not sure which. :-)
There have been previous reports on the list about broadcasters doing
funny things to their transport streams, in the name of saving bits,
typically in a situation where you have sub-channels. You probably just
ran into one of those.
So something in the stream is confusing enough to myth - or just plain
wrong - that it thinks the program is progressive instead of interlaced.
You can try contacting the station's engineer - they may be willing to
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