Add exit1 function, and explain some failures.

1 files changed, 8 insertions, 2 deletions

diff --git a/localvideowebencode b/localvideowebencode
index 7aaca47..e49999e 100755
--- a/localvideowebencode
+++ b/localvideowebencode
@@ -9,14 +9,20 @@
 
 set -e
 
+exit1() {
+	response="${1:+Error: }${1:-Internal error!}"
+	echo >&2 "$response"
+	exit 1
+}
+
 # input filename (mandatory)
-infile="$1"; shift
+infile="$1"; shift || exit1 "Input file missing!"
 filebase=$(echo "$infile" | perl -pe 's/\.[^.]*//')
 
 # output size in WIDTHxHEIGHT (mandatory)
 # TODO: Make optional with input size as default
 # TODO: Make each half of size optional with default resolved from input aspect ratio
-size="$1"; shift
+size="$1"; shift || exit1 "Unknown output size!"
 width=$(echo "$size" | perl -pe 's/[^x]*x//')
 height=$(echo "$size" | perl -pe 's/x[^x]*//')
 heightplus=${height:+$(($height+4))}