Read and inspect closed captions in Media Analyzer
Read CEA-608 and CEA-708 captions, search for dialogue, inspect control commands, and trace individual characters back to their packets and bytes in Media Analyzer.
Formats
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Parsing DASH and HLS segments as one stream: why the init segment matters
A single DASH or HLS media segment is undecodable on its own. Here is how the Advanced tab parses the init and media segments as one sequence, so the init segment SPS/PPS apply across every segment.
Fragmented MP4 explained: how moof and trun replace the sample tables
In a fragmented MP4 the moov index is an empty template and every few seconds of media carries its own mini index: a moof box. Here is how tfhd defaults, tfdt timestamps, and the trun sample table rebuild everything stbl used to hold, field by field, with real values from a real file.
Inside an MP4: the ISOBMFF box (atom) structure explained
An MP4 is just a tree of nested boxes: one box holds your video and audio, the rest are a table of contents that says where everything is. Learn to read that tree and you can open almost any modern media file. First post in a series on media file formats.
Decoding Media Metadata: How Tools and Devices Leave Their Fingerprints
Every media file contains subtle traces of its creation. Embedded within these files are unique fingerprints left by the tools, devices, and encoders used during production. These metadata elements a
Exploring Apple's Stereoscopic Video
Apple's recent introduction of stereoscopic ("3D") video storage format for its visionOS platform, the algorithmic core of Apple Vision Pro glasses, has sparked a surge in interest. Support for this