gen_posters.sh

gen_posters.sh

#!/bin/bash
########################################################################
# gen_posters.sh - generate posters for plex video libraries
########################################################################
#
# Grabs a frame from a video file and creates a scaled, cropped
#   poster file in the same directory
# Creates poster file in 2:3 aspect ratio
# Works on mkv, mp4 and avi
#
# Prequisites: ffmpeg, ffprobe
#
# Change directory to the base of the tree you want to create posters in
# run: bash gen_posters.sh
########################################################################
 
# Grab the frame at SECONDS
export SECONDS=5
# Library type
# Must be MOVIES or SHOWS
export LIBTYPE=SHOWS
 
# Locate all video files below current directory
find . | egrep -i '(mp4$|mkv$|avi$)' |
while read LINE
do
 
    # Grab a frame and create a scaled version in current directory
    DIR=$(dirname "$LINE")
    ffmpeg -y -nostdin -ss 5 -i "$LINE" \
        -vf "scale=640:-2" \
        -frames:v 1 tmpfile.jpg > /dev/null 2>&1
 
    # Get file dims
    WIDTH=$(ffprobe -v error -select_streams v -show_entries stream=width,height \
        -of csv=p=0:s=x tmpfile.jpg | cut -d'x' -f1)
    HEIGHT=$(ffprobe -v error -select_streams v -show_entries stream=width,height \
        -of csv=p=0:s=x tmpfile.jpg | cut -d'x' -f2)
 
    NEW_WIDTH=$(echo "$HEIGHT*0.66" | bc | cut -d'.' -f1)
    STARTX=$(echo "((640-$NEW_WIDTH)/2)" | bc | cut -d'.' -f1)
 
    # Episode and movie posters are named differently
    # per the plex standard
    if [ $LIBTYPE = MOVIES ]
    then
        OUTPUT_FILE="$DIR/cover.jpg"
    else
        FILE=$(echo "$LINE" | rev | cut -d'.' -f2- | rev)
        OUTPUT_FILE="$FILE.jpg"
    fi
 
    # Create cover.jpg alongside the video file
    ffmpeg -y -nostdin -i tmpfile.jpg \
        -vf "crop=$NEW_WIDTH:$HEIGHT:$STARTX:0" \
        "$OUTPUT_FILE" > /dev/null 2>&1
 
    echo Created $OUTPUT_FILE
 
done