: In some cases, strings like "21676" appear in FFmpeg or HandBrake logs when processing video. 3. Potential Misspelling or Truncation
: A paper ID like 2106.076... might be what you're recalling.
: Search for "H.264/AVC" or "H.265/HEVC" efficiency if the number refers to a specific bitrate or resolution setting. 2. Specific Technical Documents