merge subtitles and mp4 into mkv.

merge_vostfr.sh

#!/bin/bash

# DEPENDENCIES
hash ffmpeg 2>/dev/null || { echo >&2 "ffmpeg required but it's not installed. Aborting."; exit 1; }

# CHECK INPUT FILES
if [ -z "$1" ]; then echo "No argument supplied, please add the movie path as first argument"; exit 2; fi

input=$1
filename=$(basename "$input")
extension="${filename##*.}"
filename="${filename%.*}"
output=$filename"_VOSTFR."$extension

srt_file=""
if [ -f "$filename.srt" ]; then
  srt_file="$filename.srt"
else
  if [ -f "$filename.$extension.srt" ]; then
    srt_file="$filename.$extension.srt"
  else 
    echo "No french sub file found, should be \"$filename.srt\" or \"$filename.$extension.srt\""
    exit 3;
  fi
fi

encoding=`file -I "$srt_file" | cut -f 2 -d";" | cut -f 2 -d=`
if [[ $encoding == "unknown-"* ]]
then
  echo "Charset of srt file not known, trying iso-8859-1";
  encoding="iso-8859-1"
fi

if [ "$extension" = "mkv" ]; then
  echo "mkv file"
  ffmpeg -i "$input" -sub_charenc $encoding -f srt -i "$srt_file" -map 0:0 -map 0:1 -map 1:0 -c:v copy -c:a copy -c:s srt "$output"
else
  echo "other file"
  ffmpeg -i "$input" -sub_charenc $encoding -f srt -i "$srt_file" -map 0:0 -map 0:1 -map 1:0 -c:v copy -c:a copy -c:s mov_text -metadata:s:s:0 language=fre "$output"
fi