diff --git a/.bin/cam b/.bin/cam
index b73b3c5..5c6fb40 100755
--- a/.bin/cam
+++ b/.bin/cam
@@ -1,27 +1,40 @@
 #!/bin/sh
 
+# defaults
+_format="-input_format mjpeg"
+
+# loop through arguments
 for arg in $@
 do
+    # set values based of arguments found
     case $arg in
-            start) shift; _start=1 ;;
-             stop) shift; _stop=1 ;;
-             list) shift; _list=1 ;;
-            mjpeg) shift; _format="-input_format mjpeg" ;;
+          s|start) shift; _start=1 ;;
+      k|kill|stop) shift; _stop=1 ;;
+           l|list) shift; _list=1 ;;
               raw) shift; _format="-input_format yuyv422" ;;
            fullhd) shift; _res="-video_size 1920x1080" ;;
                hd) shift; _res="-video_size 1280x720" ;;
                sd) shift; _res="-video_size 640x360" ;;
-              max) shift; _res=max ;;
+               30) shift; _fps="-framerate 30" ;;
+               60) shift; _fps="-framerate 60" ;;
+              max) shift; _res="max" ;;
     [0-9]*x[0-9]*) shift; _res="-video_size $arg" ;;
-                *) _dev="$arg" ;;
+            [0-9]) shift; _dev="$arg" ;;
+                *) shift; _unknown="$_unknown $arg" ;;
     esac
 done
 
+if [ ! -z "$_unknown" ]
+then
+    echo "unknown parameter(s): $_unknown"
+fi
 
 #  set device
 if [ -z "$_dev" ]
 then
     _dev="/dev/video0"
+else
+    _dev="/dev/video$_dev"
 fi
 
 # set resolution
@@ -29,9 +42,9 @@ if [ x"$_res" == x"max" ]
 then
     _res="-video_size $(ffplay -f v4l2 -list_formats all -i $_dev 2>&1 \
                             | grep mjpeg \
+                            | xargs \
                             | cut -d":" -f4 \
                             | cut -d " " -f2 \
-                            | tr-d " " \
                        )"
     _format="-input_format mjpeg"
 fi
@@ -39,40 +52,50 @@ fi
 # list supported formats + resolutions
 if [ ! -z "$_list" ]
 then
-    ffplay -f v4l2 -list_formats all -i $_dev 2>&1 \
+    command="$(echo "ffplay -f v4l2 -list_formats all -i $_dev")"
+    echo "starting: $command"
+    $command 2>&1 \
         | grep '^\[video4linux2' \
-        | cut -d: -f3,4
+        | cut -d: -f3,4 \
+        | sed -e 's/^[ \t]*//;s/ : /: /'
     exit 0
 fi
 
-command="$(echo "ffplay -loglevel quiet -f v4l2 $_format $_res -i $_dev" | xargs)"
-
 if [ ! -z "$_start" ]
 then
-    echo "starting: $command"
-    $command > /dev/null 2>&1 &
+    command="ffplay -loglevel quiet -f v4l2 $_fps $_format $_res -i $_dev"
+    echo "starting: $command" | xargs
+    _SWM_WS=-1 $command > /dev/null 2>&1 &
+    [ $? -ne 0 ] \
+        && echo "ffplay couldn't start"
     exit 0
 fi
+
 if [ ! -z "$_stop" ]
 then
-    echo "stopping: $command"
-    pkill -qf "$command"
+    echo "stopping: ffplay -loglevel quiet -f v4l2"
+    pkill -qf "ffplay -loglevel quiet -f v4l2"
     exit 0
 fi
 
 if [ $(( _start + _stop + _list )) -eq 0 ]
 then
-    echo "usage: cam command [format] [resolution] [device]"
+    echo "usage: cam command [framerate] [format] [resolution] [device]"
     echo "  commands:"
     echo "    start             - start camera"
     echo "    stop              - stop camera"
     echo "    list              - list supported formats and resolutions"
     echo "  formats:"
+    echo "    raw               - reads the yuyv422 stream (default is mjpeg)"
+    echo "  resolutions:"
     echo "    sd                - set video size to 640x360"
     echo "    hd                - set video size to 1280x720"
     echo "    fullhd            - set video size to 1920x1080"
     echo "    max               - set maximum video size (implies mjpeg format)"
     echo "    <width>x<height>  - manually set resolution (see list command)"
-    echo "  <device>            - set video device (defaults to /dev/video0)"
+    echo "  framerates:"
+    echo "    30                - set framerate to 30 fps"
+    echo "    60                - set framerate to 60 fps"
+    echo "  <device>            - set video device number (defaults is 0)"
     exit 2
 fi