Module codec_probe 

Codec identification from raw bitstream bytes.

Provides magic-byte and structural probing of codec bitstreams with a confidence score for each candidate codec. The probe intentionally avoids full parsing so that it remains fast and safe to call on untrusted data.

Supported codecs

• AV1 — OBU temporal delimiter / sequence header signature
• VP9 — IVF frame header / superframe marker heuristic
• VP8 — VP8 frame header tag detection
• H.264 / AVC — AnnexB start codes + SPS NAL type byte
• H.265 / HEVC — AnnexB start codes + VPS/SPS NAL type bytes
• Theora — Ogg Theora identification header magic bytes
• Opus — Ogg Opus identification header magic bytes
• Vorbis — Ogg Vorbis identification header magic bytes
• FLAC — fLaC stream marker
• PCM — Raw PCM (always low confidence unless framed; detected by exclusion)
• PNG — PNG signature bytes
• GIF — GIF87a / GIF89a magic
• WebP — RIFF/WEBP container signature
• JPEG-XL — JXL codestream / ISOBMFF signature
• MPEG-4 AAC — ADTS sync word

Structs

Confidence

Confidence of a probe match, expressed as a value in [0, 100].

ProbeResult

Result of probing a single codec against a byte buffer.

Enums

CodecId

Identifies a codec or media format in the probe result.

Functions

probe_all

Probe data against all known codecs and return all results sorted by descending confidence.

probe_best

Probe data and return the single best-matching codec along with its confidence.

probe_codec

Probe data against a specific codec and return the result.