Converts video files in current folder to AMV 128x128 compatible with RUIZU Digital Music Player. Prerequisite: ffmpeg

convert_amv.sh

#!/bin/bash

# Converts video files to 128x128 amv video for RUIZU Digital Music Player
# Requires ffmpeg: brew install ffmpeg

# Supported video formats
extensions=("mp4" "mov" "avi" "mkv" "flv" "wmv" "mpeg" "mpg" "webm" "divx")

for ext in "${extensions[@]}"; do
  for file in *."$ext"; do
    [ -e "$file" ] || continue

    basename="${file%.*}"
    output="${basename}.amv"

    echo "Converting: $file → $output"

    ffmpeg -i "$file" -vf scale=128:128,fps=30 \
      -c:v amv -b:v 256k \
      -c:a adpcm_ima_amv -ar 22050 -ac 1 \
      -block_size 735 "$output"
  done
done