transcode_ffmpeg.sh

#!/bin/bash
# transcode_ffmpeg.sh
# Nanawel 2014
# https://lanterne-rouge.info/2014/01/num%C3%A9risation-de-vhs-sous-linux

echo "====== Transcode (FFmpeg) ======"

#OUTPUT=/mnt/workspace/videos/record_$(date +%s).tr.mkv
VCODEC="mpeg4"				# Video codec
ACODEC="mp3"				# Audio codec
VB="6000k"					# Video bitrate
AB="160k"					# Audio bitrate
BIN="ffmpeg"

if [ -z "$1" ]; then
	echo Missing argument
    exit 1
fi
IN=$1

STARTTIME=""
if [ ! -z "$2" ]; then
    STARTTIME="-ss $2"
fi

STOPTIME=""
if [ ! -z "$3" ]; then
    STOPTIME="-to $3"
fi

OUTPUT=$IN.mkv
if [ -f $OUTPUT ]; then
    echo "Output file $OUTPUT already exists! Aborting."
    exit 2
fi

CMD="$BIN -i $IN \
	-c:v $VCODEC -b:v $VB \
	-c:a $ACODEC -b:a $AB \
	$STARTTIME $STOPTIME \
	$OUTPUT"

echo "====== Command ======"
echo $CMD
echo
echo Press Enter to confirm or Ctrl-C to abort
read

echo "====== Running ======"
$($CMD)