[mythtv-users] Re: pvr-250 aspect and A/V sync problems

[Matthew Schumacher]

Thanks for your reply,

Yes, I'm sure it's captured in 640 x 480, mplayer shows this when 
playing the ring buffer while watching TV live:

Playing /mnt/data/videoTemp/ringbuf2.nuv.
LMLM4 Stream Format not found
MPEG-PS file format detected.
VIDEO:  MPEG2  640x480  (aspect 2)  29.970 fps  6000.0 kbps (750.0 kbyte/s)

It turns out that my test box is dual head and that was causing 
problems, when I put it in single head mode that seamed to resolve the 
issue.  Perhaps this will help someone else on the list.

schu


papenfuss at juneau.me.vt.edu wrote:
> 	I asked on the aspect thing last week.  Are you *sure* it captured at 
> 640x480?  See what mplayer thinks... you've probably captured at 480x480 
> (either though mis-settings or bug).
> 
> My situation was running a non-4:3 resolution (720x480) in X resulted in black
> bars on the sides of the screen as mythtv was scaling to square pixels.  The
> solution is to add a "DisplaySize width height" option to the XF86config file.  
> 
> Just as a note, this worked, but just any numbers didn't.  Mythtv refused to 
> show at "DisplaySize 400 300" for instance, but worked at "DisplaySize 320 
> 240."  Also, you have to override the dpi override in /etc/X11/gdm/gdm.conf for 
> redhat9 (probably fedora too)
> 
> from:
> command=/usr/X11R6/bin/X -dpi 100
> to:
> command=/usr/X11R6/bin/X
> 
> ... otherwise X will be forced to be in 100 dpi for both X and Y.
> 
> I think I answered a question you didn't ask... :)
> 
> -Cory
> 
> On Mon, 1 Mar 2004, Matthew Schumacher wrote:
> 
> 
>>List,
>>
>>For a very long time I was using some early ivtv drivers and
>>mythtv-0.11.  This setup worked perfectly and never gave me a lick of
>>trouble, but recently I wanted some of the new features so I decided to
>>download ivtv-0.1.9, linux-2.4.25, and mythtv-0.14.  I used the latest
>>pvr-250 firmware from the hauppauge site and the latest v4l2 patches.
>>
>>Capturing seems fine as I can play back the mpeg2 video with mplayer,
>>but when I watch live tv or play back a recorded video I get the video
>>in 480x480 resolution even though I captured it in 640x480.  This causes
>>the video to be perfectly square and stretched.  If I set my capture
>>profile to use 640x480 resolution with the 16:9 aspect ratio then
>>playback is right but the recorded file looks very wrong in mplayer.  I
>>want the capture to be right so I want to use 640x480 with the 4:3
>>aspect ratio.  Does anyone have any ideas on how to make the mythtv
>>player play the files correctly?
>>
>>Also, I noticed that the audio sync is also slightly off, if I use the
>>experimental A/V sync that seems to clear it up unless I use FF then it
>>takes a second of playback to resync the audio.  These problems didn't
>>exist in mythtv-0.11 so I wonder if there is some new feature I can turn
>>off.
>>
>>Anyone else with a pvr card noticing these problems?
>>
>>Thanks,
>>
>>schu
>>
>>
> 
> 
> 
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