Embed Assets into Single HTML

Total size limit: 5 MB per widget. Compress first, embed second.

Step 1: Compress

Images — convert to WebP, resize to display dimensions:

# Best: WebP lossy (tiny, good quality)
ffmpeg -i input.png -vf scale=800:-1 -quality 75 output.webp

# Or with ImageMagick
convert input.png -resize 800x -quality 75 output.webp

Audio — convert to low-bitrate MP3 or Opus:

# MP3, 64kbps mono (voice/narration)
ffmpeg -i input.wav -ac 1 -b:a 64k output.mp3