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Hauppauge WinTV PVR-350 Composite-Out gives distorted image under Linux.

Posted on 2004-04-01
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Last Modified: 2007-12-19
After checking that everything of the PVR-350 worked under Wind-nose I set out to install mythtv on my linux partion. And after a hard struggle I triomphed! (And went a bit wauuuga! over it, man wat a good programe and it's still a beta version) But I still have a problem. I set up the TV-out port by activating the ivtv-fb.o module. After starting:

rmmod saa7127
insmod saa7127 enable_output=1 output_select=0 test_image=1

Which should select composite out and show an image with coloured stripes on the tv. But in my case it showed only a gray-scale image. On switching myth to livetv it showed the feed in back-and white and it was stretched twisted to the lower right corner. Just like it couldn't find the vertical hold. Sound was ok.

Running
/usr/local/bin/test_ioctl -d /dev/video16 -u 0xff
to select PAL did not help (/dev/video16 is the correct tvout device).

selecting output_select=1 did not help either.

Is this perhaps a NTSC vs. PAL problem? I have a PAL-B tv.
Or is the an 'undocumented feature'?
Has anyone some handy pointers?

Stats:
Linux - Suse 9.0
ivtv - 0.1.9
mythtv - 0.14
TV standard - PAL-B
Tv Card - Hauppauge WinTV-350
CPU - Pent4 1.7GHz
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Question by:asciiman
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4 Comments
 
LVL 69

Expert Comment

by:Callandor
ID: 10731808
Many issues with color not showing on output to a tv have to do with either an s-video cable that doesn't work or an improper format being sent, such as NTSC to a PAL set.  If you verified that the card works in Windows, then at least the card is ok.  If you are using a SCART connector to your tv, I have read that s-video may not transmit color through that device and a special adapter is required: http://www.svideo.com/svideoscart.html
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Author Comment

by:asciiman
ID: 10738915
Callandor: I came across this phenomenon before and solved it through some simple trial and error( s-video didn't work, so I tried composite). Under windhose it does give a correct (colour and steady) signal through THE SAME connection as I tried the Linux one. Therefore it cannot be the connection or the card, it has to be the driver.

But if the cable works with both PAL and NTSC that doesn't mean the actual data (format) is identical for both systems right? You must tell the driver to use PAL on Composite out?
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Accepted Solution

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Callandor earned 150 total points
ID: 10743388
That is correct.  I don't know how you do that, though.  Perhaps the Linux guys might know?
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Author Comment

by:asciiman
ID: 10789939
Asked the linux guys; answer proverd to be very simple
rmmod saa7127
insmod saa7127 enable_output=1 output_select=0 test_image=1 pal=1

Thanks for the help.
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