+ "vidcat -b -f ppm -s 640x480 > $tmpfile 2>-", # w3cam/ovcam
+
+ "vidtomem -f $tmpfile 2>&- " . # Silicon Graphics
+ "&& mv $tmpfile-00000.rgb $tmpfile",
+
+ # "mplayer -really-quiet tv://0 " . # Maybe works with some cams?
+ # "-ao null -vo pnm -frames 1 2>&- " .
+ # "&& mv 00000001.ppm $tmpfile",
+