On Wed, Nov 02, 2005 at 03:05:24PM +0000, Hugo Filipe Costelha De Castro wrote:
> Hi,
>
> Is it possible to set the framerate (with video size) using standard v4l2
> calls? Or do I need to use the VIDIOCSWIN from pwc?
>
> I'm using a Philips Toucam Pro 740. I have code working using video4linux
> and the pwc driver, but I was trying to migrate to v4l2, trying to use
> specific pwc code as least as possible so I don't get too much attached to
> a specific camera(s).
>
They are an undocumented feature in the pwc driver. You can set the fps using
VIDIOCSWIN or VIDIOC_S_FMT ioctls.
Take a look in the file pwc-v4l.c
----------------------------------------------------------------------------
Trace(TRACE_MODULE, "ioctl(VIDIOC_S_FMT)\n");
compression = (f->fmt.pix.priv & PWC_QLT_MASK) >> PWC_QLT_SHIFT;
snapshot = f->fmt.pix.priv & PWC_FPS_SNAPSHOT;
fps = (f->fmt.pix.priv & PWC_FPS_FRMASK) >> PWC_FPS_SHIFT;
if (fps == 0)
fps = pdev->vframes;
snapshot = f->fmt.pix.priv & PWC_FPS_SNAPSHOT;
----------------------------------------------------------------------------
Luc
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