v4l2object: Protect against zero PAR num/demu

This fixes an assertion when the driver implement CROPCAP but does
not set the PAR.

diff --git a/sys/v4l2/gstv4l2object.c b/sys/v4l2/gstv4l2object.c
index e9b3e24..ad47fe0 100644 (file)
--- a/sys/v4l2/gstv4l2object.c
+++ b/sys/v4l2/gstv4l2object.c
@@ -4182,7 +4182,7 @@ gst_v4l2_object_probe_caps (GstV4l2Object * v4l2object, GstCaps * filter)
         GST_WARNING_OBJECT (v4l2object->dbg_obj,
             "Failed to probe pixel aspect ratio with VIDIOC_CROPCAP: %s",
             g_strerror (errno));
-    } else {
+    } else if (cropcap.pixelaspect.numerator && cropcap.pixelaspect.denominator) {
       v4l2object->par = g_new0 (GValue, 1);
       g_value_init (v4l2object->par, GST_TYPE_FRACTION);
       gst_value_set_fraction (v4l2object->par, cropcap.pixelaspect.numerator,