BDInfo

BDInfo is an analysis tool for Blu-ray Disc directory structures, used to read BDMV files, playlists, and transport streams, and to generate disc technical reports. It can list information such as video, audio, graphic subtitles, chapters, clips, and capacity without having to play the content in its entirety according to the normal program duration, and is commonly used to describe the disc configurations of commercial Blu-ray and Ultra HD Blu-ray discs.

Blu-ray on-screen programs typically consist of one or more M2TS clips referenced by an MPLS playlist. BDInfo enumerates playlists, calculates durations and clip relationships, and identifies encoding, resolution, frame rate, aspect ratio, audio format, channels, sample rate, and language flags from the streams. For Ultra HD content, fields such as HEVC, bit depth, HDR, and color description may also be displayed; the actual visible items depend on the software version and the metadata present in the stream. The depth of information obtained from a quick scan and a full scan may differ. Some nominal or peak fields can be obtained from the stream header and playlist, while average bitrate and detailed statistics require traversing more data. Seamless branches, repeated segment references, pseudo-playlists, and playback paths generated by menus can complicate the determination of the “main movie”; the longest playlist is not always the only correct program.

BDInfo The report is the result of parsing the scanned file; it does not constitute authentication of the disc’s authenticity or video quality. It can indicate that the video stream uses formats such as AVC, HEVC, Dolby TrueHD, or DTS-HD Master Audio, but it cannot evaluate master quality based solely on the codec name, nor can it prove that the file directory has not been truncated or modified. Encrypted commercial discs also require the system to have a legitimate, readable data access path; the analysis tool itself does not constitute a decryption license.

Sections of the report such as DISC INFO, PLAYLIST REPORT, VIDEO, AUDIO, SUBTITLES, and FILES can be saved as text files. Field order and numerical precision may vary across different BDInfo branches, versions, and scan options; when referencing the report, the tool version and scan target must be specified. Manually edited text cannot replace a rescan of the original directory.