Observed arrival · 2026-09-11
MediaOnDeck Opens MP4 Encoding All the Way Down
A browser-based MP4 bitstream analyzer that maps container structure, frame data, QP heatmaps, motion vectors, and raw bytes without uploading the file.
Field notes
MediaOnDeck parses ISOBMFF structures from MP4-family files in the browser, then exposes both frame-level metadata and lower-level encoding details. Its documented views include ftyp/moov/trak/stbl box hierarchies, sample byte offsets, PTS and DTS values, I/P/B classification, QP heatmaps, motion-vector overlays, and hexadecimal bitstream navigation. The stated codec coverage is H.264/AVC and H.265/HEVC, with audio tracks listed for basic information.
Observed signals
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Editorial observations of this landing page, not a rating.
One card from the complete issue