diff --git a/bin/ffscreencast b/bin/ffscreencast
index 95fa5f4..791249c 100755
--- a/bin/ffscreencast
+++ b/bin/ffscreencast
@@ -421,7 +421,7 @@ can_use_ffmpeg() {
 				return "${EXIT_OK}"
 			fi
 		elif [ "${UNAME}" = "Linux" ]; then
-			if ! ${FFMPEG} -version 2>&1 | $GREP '\-\-enable-x11grab' > /dev/null 2>&1 \
+			if ! ${FFMPEG} -version 2>&1 | $GREP '\--enable-x11grab' > /dev/null 2>&1 \
 				&& ! ${FFMPEG} -devices 2>&1 | $GREP 'x11grab' > /dev/null 2>&1; then
 				# Nope, no x11grab found in ffmpeg
 				return "${EXIT_ERR}"
@@ -517,7 +517,7 @@ get_screen_device_names() {
 	if [ "$(uname)" = "Darwin" ]; then
 		DEVICE_NAMES="paste <(echo \"\$(ffmpeg -f avfoundation -list_devices true -i '' 2>&1 | $GREP 'AVFoundation input' | $SED -n '/AVFoundation video/,/AVFoundation audio/p' | $GREP -oE '\[[0-9]\].*$' | $GREP 'Capture screen')\") <(echo \"\$(system_profiler SPDisplaysDataType | $SED -n '/^\s.*Displays:$/,\$p' | $GREP -vE '^\s.*Displays:$' | $GREP -E '^\s.*w*:$|Resolution:' | $SED 'N;s/\n/ /' | $SED 's/ \{1,\}/ /g' | $SED 's/^[ \t ]*//;s/[ \t ]*$//')\")"
 	elif [ "$(uname)" = "Linux" ]; then
-		DEVICE_NAMES="xdpyinfo | $GREP -A 1 -E '^screen #[0-9]*:' | $GREP -vE '^\-\-' | $SED 'N;s/\n/ /' | $SED 's/dimensions://g' | $SED 's/ \{1,\}/ /g' | $AWK '{printf \"[%d] %s\n\", NR, \$0}'"
+		DEVICE_NAMES="xdpyinfo | $GREP -A 1 -E '^screen #[0-9]*:' | $GREP -vE '^--' | $SED 'N;s/\n/ /' | $SED 's/dimensions://g' | $SED 's/ \{1,\}/ /g' | $AWK '{printf \"[%d] %s\n\", NR, \$0}'"
 	fi
 	if [ "${1}" = "yes" ]; then echo "${DEVICE_NAMES}"; else eval "${DEVICE_NAMES}"; fi
 }
@@ -543,7 +543,7 @@ get_camera_device_names() {
 	if [ "$(uname)" = "Darwin" ]; then
 		DEVICE_NAMES="ffmpeg -f avfoundation -list_devices true -i '' 2>&1 | $GREP 'AVFoundation input' | $SED -n '/AVFoundation video/,/AVFoundation audio/p' | $GREP -oE '\[[0-9]\].*$' | $GREP 'Camera' | while read line; do tmp=\"\$(echo \$line | $GREP -oE '^\[[0-9]*\]' | $SED 's/\[//' | $SED 's/\]//')\"; reso=\"\$(ffmpeg -t 1 -f avfoundation -r 0.1 -i \$tmp -f mkv - 2>&1 | $GREP '\[avfoundation' | $SED -n '/Supported modes:/,\$p' | $GREP -oE '[0-9]*x[0-9]*\@\[.*fps' | $SED 's/\[[0-9]*\.[0-9]*//' | $SED 's/\s//' | $SED 's/]fps//' | $AWK '{ if(\$0 ~ /\./) sub(\"\\\.*0+\$\",\"\");print}' | tr '\n' ' ' | xargs)\"; echo \"\$line (\$reso)\"; done"
 	elif [ "$(uname)" = "Linux" ]; then
-		DEVICE_NAMES="v4l2-ctl --list-devices | $GREP -B 1 '/dev/video' | $GREP -vE '^\-\-' | $SED 'N;s/\n/ /' | $SED 's/ \{1,\}/ /g' | $AWK '{printf \"[%d] %s\n\", NR, \$0}'"
+		DEVICE_NAMES="v4l2-ctl --list-devices | $GREP -B 1 '/dev/video' | $GREP -vE '^--' | $SED 'N;s/\n/ /' | $SED 's/ \{1,\}/ /g' | $AWK '{printf \"[%d] %s\n\", NR, \$0}'"
 	fi
 	if [ "${1}" = "yes" ]; then echo "${DEVICE_NAMES}"; else eval "${DEVICE_NAMES}"; fi
 }