code.delx.au - transcoding/blob - trim-audio

   1 #!/bin/bash
   2
   3 if [ -z "$1" -o -z "$2" -o -z "$3" ]; then
   4     echo "Usage: $0 input start end"
   5     exit 1
   6 fi
   7
   8 input="$1"
   9 ss="$2"
  10 endpos="$3"
  11 let duration="$endpos - $ss"
  12 output="${input%%.*}-trimmed.${input##*.}"
  13
  14 if [ "$input" = "$output" ]; then
  15     echo "Internal error! Would overwrite "$input" with output file"
  16     exit 1
  17 fi
  18
  19 avconv -ss "$ss" -t "$duration" -i "$input" -acodec copy "$output"
  20