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useful-scripts/ffmpeg/ffmpeg-batch-encode.sh
2020-11-24 23:07:00 -05:00

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#!/bin/bash
# Help function
Help()
{
# Display Help
echo "This script uses sensible ffmpeg options to batch encode MKV files in a directory to compressed H264 MKVs."
echo "You can change the CRF parameters in the script, defaults are 24 for HD and 22 for 4K."
echo
echo "SYNTAX: ./ffmpeg-encode.sh 'INPUT DIRECTORY'"
echo "EXAMPLE: ./ffmpeg-encode.sh ~/Videos/Movies"
echo
echo "Learn more about FFmpeg's quality settings: https://trac.ffmpeg.org/wiki/Encode/H.264"
}
### Script ###
DIRECTORY=$1
QUALITY_HD=22
QUALITY_4K=24
# Basic error handling
if [ -z "$1" ]; then
printf "ERROR: You must specify a source directory\n\n" 1>&2
Help
exit 1
fi
# Create output folder within source directory
if [ ! -d "$DIRECTORY/output" ]; then
mkdir "$DIRECTORY/output"
fi
# Encode each file in the directory with different CRF setting based on resolution
for FILE in "$DIRECTORY"/*; do
RES=$(ffprobe -v error -select_streams v:0 -show_entries stream=width -of default=noprint_wrappers=1:nokey=1 "$FILE")
FILENAME=$(basename "$FILE")
if [[ $RES -gt 1920 ]]; then
ffmpeg -i "$FILE" -c:v libx264 -preset slow -tune film -crf "$QUALITY_4K" -c:a copy "$DIRECTORY"/output/"$FILENAME"
elif [[ $RES -le 1920 ]]; then
ffmpeg -i "$FILE" -c:v libx264 -preset slow -tune film -crf "$QUALITY_HD" -c:a copy "$DIRECTORY"/output/"$FILENAME"
else
echo "$FILENAME is not a valid filetype"
fi
done
exit 0