[mythtv-users] Problem recording at 720x576

Stephen Longhurst steve at longsteve.com
Thu May 20 04:55:50 EDT 2004

>> Off the top of my head I can't remember, but I know that everything
>> works fine when using 640x480, so I don't think things are inherently
>> wrong there.  I get full screen video in myth which I could live with.
> You are correct that the number of visible scan lines for PAL is
> 576. 480 is for NTSC. 480 will work becase it will pick and choose
> scan lines. 640x576 or 544x576 may be better choices for you.


I see, thanks for the good explanation on the horizontal resolutions.

I will try different horizontal settings and see what they look like.
I tend to be quite sensitive to picture quality, but I expect that
I'll be able to drop it down from 720 to something less.

I've now actually got 720x576 working.  I had to explicitly issue the
following test_ioctl calls from a script, after loading the ivtv

# /usr/bin/test_ioctl -u 0xff
# /usr/bin/test_ioctl -p 4
# /usr/bin/test_ioctl -f width=720,height=576
# /usr/bin/test_ioctl -v input=7,output=1

Putting these as post-install lines in modules.conf wasn't working for
some reason.

Thanks very much,


Stephen Longhurst
steve at longsteve.com

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