Module h264 

Available on crate features codec-h264 and codec only.

H.264 (AVC) bitstream helpers: NAL iteration, Annex-B ↔ AVCC conversion, and SPS resolution extraction.

Structs

H264

CodecParser implementation for H.264 / AVC.

SpsInfo

Decoded video dimensions and profile from a sequence parameter set.

Constants

NAL_IDR

NAL unit type for a coded slice of an IDR picture (keyframe).

NAL_PPS

NAL unit type for a picture parameter set.

NAL_SPS

NAL unit type for a sequence parameter set.

Functions

annexb_to_avcc

Convert an Annex-B bytestream to AVCC (length-prefixed) with a 4-byte length.

avcc_to_annexb

Convert an AVCC (length-prefixed) bytestream to Annex-B (00 00 00 01).

hls_codec_string

The HLS CODECS attribute for H.264, e.g. "avc1.4d401f" (profile/level encoded as avc1.PPCCLL). The middle byte is the constraint-set flags (0).

iter_nals_annexb

Iterate the NAL units of an Annex-B (00 00 01 / 00 00 00 01) bytestream, yielding each NAL payload without its start code.

parse_sps

Parse a sequence parameter set NAL (including its 1-byte NAL header) and extract the coded resolution. Returns None on a malformed SPS or one using a scaling matrix (unsupported here).