update synopses

diff --git a/avchdtomp4.sh b/avchdtomp4.sh
index ccc5312fe001a7127438749f66dccbdfdeb42299..24373f3f55d4db39737058a929f113c7169ae772 100755 (executable)
--- a/avchdtomp4.sh
+++ b/avchdtomp4.sh
@@ -1,7 +1,7 @@
 #! /bin/bash
 
 # AVCHD to MP4 converter
-# ffmpeg cmdline taken from http://pvdm.xs4all.nl/wiki/index.php/Convert_an_AVCHD_/_MTS_file_to_MP4_using_ffmpeg
+# ffmpeg arguments taken from http://pvdm.xs4all.nl/wiki/index.php/Convert_an_AVCHD_/_MTS_file_to_MP4_using_ffmpeg
 
 OPTIND=1
 
@@ -9,6 +9,14 @@ src=""
 dest=""
 verbose=0
 
+if (( $# < 2 ))
+       then
+                printf  "\n\x1b[31mWrong number of arguments\x1b[0m\n\n"
+                printf "Usage: avchdtomp4 -s SOURCE -d DESTINATION [-v]\n       where SOURCE is the source file, or a directory scanned for *.MTS files\n             DESTINATION is the output directory relative to working directory\n             [-v] enables verbose mode in ffmpeg"
+               exit 1
+fi
+
+
 while getopts s:d:v option; do
        case "$opt" in
        s)