--- /dev/null
+#!/bin/bash
+
+if [ -z "$1" -o -z "$2" -o -z "$3" ]; then
+ echo "Usage: $0 input start end"
+ exit 1
+fi
+
+input="$1"
+ss="$2"
+endpos="$3"
+let duration="$endpos - $ss"
+output="${input%%.*}-trimmed.${input##*.}"
+
+if [ "$input" = "$output" ]; then
+ echo "Internal error! Would overwrite "$input" with output file"
+ exit 1
+fi
+
+ffmpeg -ss "$ss" -t "$duration" -i "$input" -acodec copy "$output"
+