ffmpeg-batch

#! /bin/bash
# Read the filename from the source file and set it to the destination file. Works with one and multible file inside the same folder.
# Syntax (for systemwide use) $ffmpeg-batch [source container] [target container] [path/from/sourceDIR] [path/to/destination]
# for example: ffmpeg-batch avi mp4 /home/user/Movies /home/user/Movies/optimized
# Important: Don't use "/" at path ending otherwise the script doesn't work! 

srcExt=$1     #Source container (avi, flv, mkv, ...). The Script grap only files with this container. 
destExt=$2    #Target container (mp4, mkv, ...)

srcDir=$3     #Source folder
destDir=$4    #Destination folder

number=1

# Options for ffmpeg (the fallowing options are optimized for native HW decoding with Plesk)
opts="-movflags faststart -c:v hevc -crf 20 -preset medium --profile main --level-idc 4.0 --high-tier -ac 6 -c:a aac -b:a 192k"

# Grap the Source filename.
for filename in "$srcDir"/*.$srcExt; do

        basePath=${filename%.*}
        baseName=${basePath##*/}

# Checks whether the file already exists in the target folder. IMPORTANT: This checks only if the file exists. It can NOT continue an unfinished encoding!
if [ -e "$destDir"/"$baseName"."$destExt" ] ; then
        echo -e "\033[34m\033[1m>>>>> The file "$baseName"."$destExt" alredy exist in "$destDir"! Continue with next file <<<<<\033[0m"
        sleep 3
        return 0
else

# Create a file with chapter information for set it in the target video. 
ffmpeg -i "$filename" -f ffmetadata /tmp/"$baseName".txt 

# Check values to crop black borders. The -t 240 value (240 seconds = 4 minutes) are a good value for an relative save time to set the correct value. 
echo -e "\033[32m\033[1m>>>>> Checking information for croping black borders. This can take a while <<<<<\033[0m"
cropvalue=$(ffmpeg -i "$filename" -t 240 -vf cropdetect -f null - 2>&1 | awk '/crop/ { print $NF }' | tail -1)

# Search for the forced marked subtitle.
echo -e "\033[32m\033[1m>>>>> Searching for the subtitle maked as forced <<<<<\033[0m"
sleep 3
subIndex=$(ffprobe -v 0 -select_streams s -show_entries stream=index:disposition=forced -of compact=nk=0 "$filename" | grep disposition:forced=1 | sed -ne 's#^stream|index=\([0-9]\+\)|.*$#\1#p')
     
    if [ -z $subIndex ] ; then
            echo -e "\033[32m\033[1m>>>>> No forced subtitle present. <<<<<\033[0m"
            sleep 3
        else
            echo -e "\033[32m\033[1m>>>>> Select subtitle Track:"$subIndex" <<<<<\033[0m"
            sleep 3
    fi
 
     
    if [ -z $subIndex ] ; then

            # Convert and remove black borders if no forced subtitle is present.
            echo -e "\033[32m\033[1m>>>>> Convert $filename. No forced subtitle present <<<<<\033[0m"
            sleep 3
            ffmpeg -y -loglevel error -stats -i "$filename" -i /tmp/metadata.txt -map 0:0 -map 0:a:m:language:ger -vf "$cropvalue" -map_metadata 1 -map_chapters 1 $opts "$destDir"/"$baseName"."$destExt"
        else
            # Convert and remove black borders if forced subtitle is present.
            echo -e "\033[32m\033[1m>>>>> Convert $filename. A forced subtitle is present <<<<<\033[0m"
            sleep 3
            ffmpeg -y -loglevel error -stats -i "$filename" -i /tmp/metadata.txt -map 0:0 -map 0:a:m:language:ger -map 0:$subIndex -vf "$cropvalue" -map_metadata 1 -map_chapters 1 $opts "$destDir"/"$baseName"."$destExt"    
        fi
# Delete the Metadata file.
rm -f /tmp/"$baseName".txt

fi
done