[mythtv-users] Trying again: Bad studdering when video fades toblack, or in all white frames

[Clint Silvester]

Buchanan, Paul wrote:

>On Thursday, December 04, 2003 11:59 AM,
>mythtv-users-bounces at mythtv.org wrote: 
>  
>
>>Hey Tim,
>>
>>I haven't tried messing with the resolution settings yet, but I'll
>>play around with that.  I'm using the svideo from my directv receiver
>>as well, so 
>>it sounds like we're the same on that.  This is definitely a new
>>problem for me though as I never experienced this prior to version
>>.12. 
>>
>>I can't remember if it was you or someone else, but I've also noticed
>>that adjusting the contrast or brightness way down will make the
>>studdering during black or white screens much worse.  Turning it up
>>makes it a bit better, but I don't want to distort the image too much
>>to just try and make it stop. 
>>
>>You want to really see it studder watch the LBX(?) version of the
>>matrix on PVP.  Really dark programs (expecially with the widescreen
>>format black adding to it) pretty much studder all the way through.
>>
>>Recap of specifics:
>>No studdering with using mplayer to watch recordings that myth has
>>made. 
>>No studdering using mplayer to stream directly from /var/video
>>Happens regardless of whether I'm watching live tv, watching a
>>recording, or doing some combination of the two.  (Only when using
>>myth frontend as the player).
>>
>>joshua
>>
>>On Thu, Dec 04, 2003 at 09:52:29AM -0600, Tim wrote:
>>    
>>
>>>I still don't have a real answer, just another observation from my
>>>setup. It seems to be somewhat capture resolution dependent also.  I
>>>was playing around last night with lowering the horinzontal res
>>>after reading  the "Resolution" thread yesterday and when I changed
>>>it to 352x480 I started studdering bad.  Resetting to either 640x480
>>>or 720x480 brought it back inline to the little studder I have.
>>>
>>>Also, what input are you using?  I'm using svideo from a directv
>>>reciever, composite is the same.  I don't know about the actual
>>>tuner since I don't use that much. 
>>>
>>>----- Original Message -----
>>>From: <wishbone at h4b.org>
>>>To: <mythtv-users at mythtv.org>
>>>Sent: Wednesday, December 03, 2003 9:40 PM
>>>Subject: [mythtv-users] Trying again: Bad studdering when video fades
>>>toblack, or in all white frames
>>>
>>>
>>>      
>>>
>>>>I see really bad studdering when the video fades to black or there
>>>>is all white (or a lot of white) in the video.  For those that have
>>>>seen this, is there a recommendation to get around it yet?
>>>>
>>>>thanks,
>>>>Joshua
>>>>
>>>>Myth .12
>>>>IVTV (for my pvr-250) .12 version 1125A of jens code (although I
>>>>noticed this even with older versions) --
>>>>
>>>>*<|:oþ
>>>>"Beware the Jabberwock, my son!
>>>>The jaws that bite, the claws that catch!
>>>>Beware the Jubjub bird, and shun
>>>>The frumious Bandersnatch!"
>>>>_______________________________________________
>>>>mythtv-users mailing list
>>>>mythtv-users at mythtv.org
>>>>http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>>>>        
>>>>
>>>_______________________________________________
>>>mythtv-users mailing list
>>>mythtv-users at mythtv.org
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>>>      
>>>
>
>I don't have any answers to this problem, but I wanted to point out that I
>am experiencing this as well.  
>
>  
>
>>Recap of specifics:
>>No stuttering with using mplayer to watch recordings that myth has
>>made. 
>>No stuttering using mplayer to stream directly from /var/video
>>Happens regardless of whether I'm watching live tv, watching a
>>recording, or doing some combination of the two.  (Only when using
>>myth frontend as the player).
>>    
>>
>
>I also had not had the stuttering before version .12.  I am also
>experiencing odd frame blips.  It looks somewhat like a frame prior to the
>one just displayed is thrown in the mix.  Again, this only happens when the
>recordings from y pvr-250 are viewed with Myth as the player.
>
>Paul
>
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>
>
>  
>
I think this is because of commercial detection.  Try turning it off and 
see if you notice it.  I say this only because it looks like it happens 
whenever a commercial is about to happen.

Clint Silvester