edlextract

#! /bin/bash

#
# Marc Groenewegen © 2015
#


if [ $# -lt 1 ]; then
  echo "Extract fragment(s) from video file based on markers in edl file"
  echo "Usage: $0 videofile"
  echo
  echo "The name of the edl file is videofile.edl"
  exit
fi


INFILE=$1
EXTENSION="${INFILE##*.}"
FILEBASENAME=`basename $INFILE .${EXTENSION}`
EDL_FILE=${FILEBASENAME}.edl

echo $EXTENSION
echo $EDL_FILE

FRAMERATE=`get_framerate $INFILE`

INDEX=1

#
# Dec 2015 - apparently ffmpeg/avconv read from stdin, which caused a
# problem in the loop because it took characters from the start of $line
# Solution / hack: let ffmpeg read from a dummy file
#

cat $EDL_FILE |
while read nextline; do
  echo
  echo
  echo "Line: $nextline"
  FROM=`echo $nextline | awk 'BEGIN {FS=" "} {print $1}'`
  TO=`echo $nextline | awk 'BEGIN {FS=" "} {print $2}'`
  LENGTH=`echo "$TO $FROM - p" | dc`
  NROFFRAMES=`echo "$LENGTH $FRAMERATE * 1 / p" | dc`
  OUTFILE=${FILEBASENAME}_${INDEX}.${EXTENSION}
  echo $OUTFILE
  echo "From: $FROM";
  echo "To: $TO";
  echo "Length: $LENGTH";
  echo "Nr of frames: $NROFFRAMES"
  ffmpeg -ss $FROM -i $INFILE -frames:v $NROFFRAMES -acodec copy -vcodec copy $OUTFILE < /dev/null
  INDEX=`echo "$INDEX 1 + p" | dc`
done