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Higher v4l resolution?

On Thu, 15 Feb 2007, Jonathan Kamens wrote:
> On Sun, 17 Dec 2006, Trent Piepho wrote:
> >> There is a soft limit, on cx88.h (at function norm_maxw) of 640x480
> >> (NTSC/M, PAL/M, PAL/60) and 768x576 for the rest. Due to that, probably
> >> it is safe to change NTSC to 720x480 (just replace it at cx88.h).
> >
> >Definitely should be changed.  I have always thought this was a mistake and
> >myself use 720x480 for NTSC with a modified driver.
>
> OK, so I made this change:
>
>  static unsigned int inline norm_maxw(struct cx88_tvnorm *norm)
>  {
> -       return (norm->id & V4L2_STD_625_50) ? 768 : 640;
> +       return (norm->id & V4L2_STD_625_50) ? 768 : 720;
>  }
>
> and then recompiled and reinstalled my kernel.  With the change in
> place, both tvtime and mencoder fail.  Tvtime hangs my X display and
> forces me to kill it remotely, and mencode reports continuous "video
> buffer full - dropping frame" messages and doesn't actually save any
> video to the AVI file.  This is with Red Hat's Fedora Core 6 2.6.18
> kernel.  Any suggestions?

Get the latest drivers and see if they work.  The max NTSC horizontal
resolution has been set to 720 for about two months now.  It seems to work
fine for me.

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