Higher v4l resolution?

[Jonathan Kamens <jik (at) kamens.brookline.ma.us>]

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?

Thanks,

  jik

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