Comment by Bu9818

This reminds me of a torrent on Nyaa that implemented Bad Apple!! in ASS subtitles by retracing the frames into SVG (seems to be better quality than simply using potrace by itself), converting the SVGs into ASS Dialogue events, and muxing it into a Matroska container with a placeholder video. Therefore the "video" window can be resized without rescaling raster images (and it actually runs well on most hardware and players, unlike his other torrents putting whole anime episodes in subtitles). The subtitle attachment could also be extracted from the container and executed as a valid shell script which would run mpv or ffplay, use the respective options to create a libavfilter filter to create a blank video (to overlay the subtitles on), use its own filename for subtitles, and play the song by decoding and piping a base64 string at the bottom of the script to mpv/ffmpeg's stdin.