Batch compress and resize videos (mov, mp3, mp4)

vidcompress.sh

#!/bin/bash

# Parameters
CRF_VALUE=28  # Quality level for video compression (lower is higher quality)
FRAME_RATE=24 # Frame rate for video files
AUDIO_BITRATE=96k # Audio bitrate for MP3 files
RESIZE_PERCENT=75 # Resize percent (e.g., 75 for 75% of original size)
MIN_WIDTH=2800 # Minimum width in pixels to apply resizing

# Target directory (use current directory if not specified)
TARGET_DIR=${1:-.}

# Function to calculate new dimensions
function calculate_new_dimensions {
    WIDTH=$(ffprobe -v error -select_streams v:0 -show_entries stream=width -of csv=p=0 "$1")
    HEIGHT=$(ffprobe -v error -select_streams v:0 -show_entries stream=height -of csv=p=0 "$1")

    # Check if resizing is needed
    if [ "$WIDTH" -ge "$MIN_WIDTH" ] || [ "$HEIGHT" -ge "$MIN_WIDTH" ]; then
        NEW_WIDTH=$(echo "$WIDTH * $RESIZE_PERCENT / 100" | bc)
        NEW_HEIGHT=$(echo "$HEIGHT * $RESIZE_PERCENT / 100" | bc)
        echo "-vf scale=$NEW_WIDTH:$NEW_HEIGHT"
    else
        echo ""
    fi
}

# Change to target directory
cd "$TARGET_DIR"

# Compress and resize MOV and MP4 files
for f in *.mov *.mp4; do 
    echo "Processing video file $f"
    SCALE=$(calculate_new_dimensions "$f")
    ffmpeg -i "$f" -vcodec libx264 -crf "$CRF_VALUE" -r "$FRAME_RATE" $SCALE "${f%.*}-compressed.${f##*.}"
    mv "${f%.*}-compressed.${f##*.}" "$f"
done

# Compress MP3 files
for f in *.mp3; do 
    echo "Processing audio file $f"
    ffmpeg -i "$f" -ab "$AUDIO_BITRATE" "${f%.mp3}-compressed.mp3"
    mv "${f%.mp3}-compressed.mp3" "$f"
done