On Sat, Mar 18, 2017 at 08:41:14PM -0400, Nicolas Dufresne wrote: > Along with the norm fallback, GStreamer could could also consider the > currently set framerate as returned by VIDIOC_G_PARM. At the same time, > implementing that enumeration shall be straightforward, and will make a > large amount of existing userspace work. Since, according to v4l2-compliance, providing the enumeration ioctls appears to be optional: 1) should v4l2-compliance be checking whether other frame sizes/frame intervals are possible, and failing if the enumeration ioctls are not supported? 2) would it also make sense to allow gstreamer's v4l2src to try setting a these parameters, and only fail if it's unable to set it? IOW, if I use: gst-launch-1.0 v4l2src device=/dev/video10 ! \ video/x-bayer,format=RGGB,framerate=20/1 ! ... where G_PARM says its currently configured for 25fps, but a S_PARM with 20fps would actually succeed. -- RMK's Patch system: http://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up according to speedtest.net. _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
