Crate transmux 

transmux — an any-to-any media container muxing hub (ISO/IEC 14496-12, 13818-1, 23009-1, RFC 8216/3550, [MS-SSTR]).

transmux demuxes any supported container into one neutral in-memory intermediate representation (Media / Track) and muxes from it into any supported container — the demux and mux spokes meet at the IR, so every {input} → {output} combination composes, with one documented exception: WebM’s VP8 and Vorbis tracks (CodecConfig::Vp8/CodecConfig::Vorbis) have no ISOBMFF sample entry in this crate, so they do not participate in the fMP4/CMAF mux path — {WebM} → {CMAF/progressive-MP4/TS/DASH/LL-DASH/ CMAF-HLS/LL-HLS/Smooth} fails on those tracks with Error::UnsupportedCodec; only WebM → WebM/MkvMux round-trips them. It never encodes or decodes media: it parses codec config/parameter headers only to build container boxes and derive metadata; coded samples pass through opaque. no_std + alloc.

The spokes are expressed through the two abstract traits in broadcast_common: Unpackage (container → IR) and Package (IR → container), the inverse pair mirroring Parse / Serialize.

• Demux (Unpackage) inputs: MPEG-2 TS (TsDemux, a thin batch wrapper over the event-driven StreamingTsDemux — issue #555), fMP4/CMAF (Fmp4Demux), progressive (non-fragmented) MP4 (ProgressiveDemux — issue #561), MPEG Program Stream (PsDemux), WebM/Matroska (WebmDemux — laced blocks are a hard error, not silently skipped; real ffmpeg/mkvmerge captures without lacing demux fine, see the module docs), FLV (FlvDemux — non-AVC video and non-AAC audio tracks are silently skipped, no event/error, see the module docs), RTMP (RtmpDemux).
• Mux (Package) outputs: CMAF/fMP4 (CmafMux), progressive single-file MP4 (ProgressiveMux), MPEG-2 TS (TsMux), Matroska (MkvMux), CMAF-HLS (HlsPackager), TS-segment HLS (TsHlsPackager), DASH MPD (DashPackager), low-latency DASH (LlSegmenter/LlDashPackager), Microsoft Smooth Streaming (SmoothPackager — H.264 video + AAC-LC audio only, every other codec rejected), RTMP (RtmpMux), low-latency HLS (LlHlsSegmenter, live-edge open segments via broadcast_hls::OpenSegment).
• Transforms: resegment / trim / track-select (Repackage); streaming CMAF segmentation (Segmenter); streaming classic-HLS segmentation (StreamingTsHlsSegmenter); IR timeline conditioning — PTS/DTS rebase and offset, discontinuity-gap insertion (rebase_to_zero / apply_offset / insert_discontinuity_gap, via each absolute Sample dts/pts and the Track::start_decode_time anchor kept in lockstep with it — 33-bit MPEG wrap-unroll happens once, at the demux edge, see ts_demux); timeline splice / concatenation → SSAI (concat / splice_insert, returning a SpliceResult with discontinuity points).
• Crypto: CENC/CBCS (cenc, AES-CTR/AES-CBC-pattern) decrypt (CencDecryptor) + encrypt (CencEncryptor, which populates Track::encryption for the muxer’s sinf/senc/saio/saiz box emission — init_segment::protect_init_segment / movie_fragment::protect_media_segment); DRM signalling driven off that same Track::encryption — DashPackager auto-derives the generic-CENC ContentProtection (plus caller-supplied per-DRM-system cenc:pssh), broadcast_hls::cenc_ext_x_key renders the HLS #EXT-X-KEY for cbcs (cenc/CTR is DASH-only — see the broadcast-hls crate’s module docs); HLS Sample-AES + full-segment AES-128 encrypt/decrypt (sample-aes, sample_aes).
• RTP/RTCP: de/packetise (RtpPacketiser / RtpDepacketiser), streaming depayload (RtpStreamDepacketiser) + SDP fmtp→config helpers (rtp_sdp); RTCP control packets (RtcpPacket).
• Conformance: structural fMP4/CMAF validator (validate_init_segment / validate_media_segment / validate_cmaf_track).
• Utilities: NAL keyframe classification (is_keyframe_nal / nal_unit_type); I-frame trick-play track derivation (derive_iframe_track).

Codec config coverage (header parse → container box; no en/decode): H.264/AVC, H.265/HEVC, H.266/VVC, AV1, VP9, VP8*, MPEG-2 video (H.262); AAC, AC-3, E-AC-3, AC-4, DTS, Opus, FLAC, Vorbis*, MPEG-1/2 audio (MP1/2/3), MPEG-H 3D Audio. (*VP8/Vorbis have no ISOBMFF sample entry — WebM-native only, see the {input} → {output} exception noted above.)

Lower-level entry points remain: build_init_segment/build_media_segment (batch CMAF), AvcSps::decode + AvcSps::rfc6381 (codec metadata). See the crate README for the full feature matrix and the examples/ directory for runnable end-to-end walkthroughs.

This crate root also exposes the low-level ISOBMFF framing it is built on: BoxHeader (optional 64-bit largesize / uuid extended type), FullBoxHeader (version + flags), and a size-driven box walker (BoxIter) that skips unknown box types by advancing by size.

Quick start

use transmux::{box_iter, parse_box, BoxHeader, BoxType};
use broadcast_common::Parse;

// Parse a simple ftyp box header.
let bytes = [0, 0, 0, 12, b'f', b't', b'y', b'p', 0, 0, 0, 0];
let header = BoxHeader::parse(&bytes).unwrap();
assert_eq!(header.box_type.to_string(), "ftyp");

Spec citations

• Box / FullBox: ISO/IEC 14496-12:2015 §4.2 (fulltext L1254–L1304).
• Box order: §6.2.3 (recommendations; only ftyp before variable-length and moof sequence_number are mandatory).
• Skip-unknown rule: §4.2 L1294 — unknown type → ignore + skip via size.

Feature flags

Feature	Default	Description
std	yes	std::error::Error impls
serde	yes	serde::Serialize for box types
cenc	yes	CENC/CBCS (ISO/IEC 23001-7) AES-CTR/AES-CBC sample decrypt (CencDecryptor) + encrypt (CencEncryptor) via the RustCrypto aes/ctr/cbc crates. DASH/HLS DRM signalling (DashPackager::content_protection, broadcast_hls::cenc_ext_x_key) reads the always-available Track::encryption/cenc box types and needs no feature
sample-aes	no	HLS Sample-AES + full-segment AES-128 (AES-128-CBC) content protection (sample_aes); implies cenc, adds the RustCrypto cbc crate
cli	no	the transmux command-line packager binary (clap; implies std) — see cli and docs/CLI-STANDARD.md

Re-exports

pub use aac_asc::AdtsHeader;

pub use aac_asc::AudioObjectType;

pub use aac_asc::AudioSpecificConfig;

pub use aac_asc::ChannelConfiguration;

pub use aac_asc::HeAacSignaling;

pub use aac_asc::SamplingFrequencyIndex;

pub use aac_asc::build_adts_header;

pub use aac_asc::parse_adts_header;

pub use ac3::Ac3SpecificBox;

pub use ac3::Ac3SyncframeInfo;

pub use ac3::Ec3SpecificBox;

pub use ac3::Ec3Substream;

pub use ac3::Ec3SyncframeInfo;

pub use ac4::AC4_FOURCC;

pub use ac4::Ac4SpecificBox;

pub use ac4::DAC4_FOURCC;

pub use annexb::NAL_LENGTH_SIZE;

pub use annexb::annexb_to_length_prefixed;

pub use annexb::iter_annexb_nals;

pub use annexb::iter_length_prefixed_nals;

pub use annexb::length_prefixed_to_annexb;

pub use au::AccessUnitSplitter;

pub use au::split_access_units;

pub use av1::AV01_FOURCC;

pub use av1::AV1C_FOURCC;

pub use av1::Av1ConfigurationBox;

pub use av1::Av1SampleEntry;

pub use avc_config::AVCConfigurationBox;

pub use avc_config::AVCDecoderConfigurationRecord;

pub use box_types::BoxHeader;

pub use box_types::BoxIter;

pub use box_types::BoxRef;

pub use box_types::BoxType;

pub use box_types::FullBoxHeader;

pub use box_types::box_iter;

pub use box_types::parse_box;

pub use cenc::OriginalFormatBox;

pub use cenc::ProtectionSchemeInfoBox;

pub use cenc::ProtectionSystemSpecificHeaderBox;

pub use cenc::SENC_FLAG_USE_SUBSAMPLE_ENCRYPTION;

pub use cenc::SampleAuxInfoOffsetsBox;

pub use cenc::SampleAuxInfoSizesBox;

pub use cenc::SampleEncryptionBox;

pub use cenc::SampleEncryptionEntry;

pub use cenc::SchemeInformationBox;

pub use cenc::SchemeTypeBox;

pub use cenc::SubSampleEntry;

pub use cenc::TrackEncryptionBox;

pub use cenc_decrypt::CencDecryptor;

pub use cenc_decrypt::KeyMap;

pub use cenc_encrypt::CencEncryptor;

pub use cenc_encrypt::ConstantIvSenc;

pub use cenc_encrypt::EncryptConfig;

pub use cenc_encrypt::IvGen;

pub use cenc_encrypt::SubsamplePolicy;

pub use dash::Addressing;

pub use dash::ContentProtectionSystem;

pub use dash::DashPackager;

pub use dash::InbandEventStream;

pub use dash::MP4_PROTECTION_SCHEME_URI;

pub use dash::MPD_NAMESPACE;

pub use dash::MediaKind;

pub use dash::PROFILE_ISOFF_LIVE;

pub use dash::TRICKMODE_SCHEME;

pub use dash::TrackSegments;

pub use dash::TrickModeAdaptationSet;

pub use dash::TrickModeRepr;

pub use dash_parse::AdaptationSet;

pub use dash_parse::DashParseError;

pub use dash_parse::Mpd;

pub use dash_parse::MpdType;

pub use dash_parse::Period;

pub use dash_parse::Representation;

pub use dash_parse::S;

pub use dash_parse::SegmentTemplate;

pub use dash_parse::SegmentTimeline;

pub use dash_parse::parse_iso8601_duration;

pub use drm::COMMON_SYSTEM_ID;

pub use drm::FAIRPLAY_SYSTEM_ID;

pub use drm::PLAYREADY_SYSTEM_ID;

pub use drm::WIDEVINE_SYSTEM_ID;

pub use drm::cenc_kid_to_playready;

pub use drm::fairplay_pssh;

pub use drm::fairplay_pssh_data;

pub use drm::playready_kid_to_cenc;

pub use drm::playready_kid_value_decode;

pub use drm::playready_pro;

pub use drm::playready_pssh;

pub use drm::playready_wrmheader;

pub use drm::widevine_pssh;

pub use drm::widevine_pssh_data;

pub use dts::DDTS_BODY_LEN;

pub use dts::DDTS_FOURCC;

pub use dts::DTSC_FOURCC;

pub use dts::DTSE_FOURCC;

pub use dts::DTSH_FOURCC;

pub use dts::DTSL_FOURCC;

pub use dts::DtsSpecificBox;

pub use error::Error;

pub use error::Result;

pub use flac::BLOCK_TYPE_STREAMINFO;

pub use flac::DFLA_FOURCC;

pub use flac::FLAC_FOURCC;

pub use flac::FlacMetadataBlock;

pub use flac::FlacSpecificBox;

pub use flv::FlvDemux;

pub use flv::FlvError;

pub use flv::FlvMux;

pub use flv::FlvPayload;

pub use flv::FlvPayloadKind;

pub use flv::flv_frame_payloads;

pub use flv::flv_sequence_header_payloads;

pub use flv_stream::StreamingFlvDemux;

pub use hevc_config::HEVCConfigurationBox;

pub use hevc_config::HEVCDecoderConfigurationRecord;

pub use init_segment::Ac3SampleEntry;

pub use init_segment::Ac4SampleEntry;

pub use init_segment::ChunkLargeOffsetBox;

pub use init_segment::ChunkOffsetBox;

pub use init_segment::DataEntryUrlBox;

pub use init_segment::DataInformationBox;

pub use init_segment::DataReferenceBox;

pub use init_segment::DtsSampleEntry;

pub use init_segment::Ec3SampleEntry;

pub use init_segment::EditBox;

pub use init_segment::FlacSampleEntry;

pub use init_segment::HandlerBox;

pub use init_segment::MediaBox;

pub use init_segment::MediaHeaderBox;

pub use init_segment::MediaInformationBox;

pub use init_segment::MhaSampleEntry;

pub use init_segment::MovieBox;

pub use init_segment::MovieExtendsBox;

pub use init_segment::MovieHeaderBox;

pub use init_segment::Mp4aSampleEntry;

pub use init_segment::OpaqueBox;

pub use init_segment::OpusSampleEntry;

pub use init_segment::SampleDescriptionBox;

pub use init_segment::SampleEntryVariant;

pub use init_segment::SampleSizeBox;

pub use init_segment::SampleTableBox;

pub use init_segment::SampleToChunkBox;

pub use init_segment::SoundMediaHeaderBox;

pub use init_segment::StblChild;

pub use init_segment::StscEntry;

pub use init_segment::SyncSampleBox;

pub use init_segment::TrackBox;

pub use init_segment::TrackExtendsBox;

pub use init_segment::TrackHeaderBox;

pub use init_segment::VideoMediaHeaderBox;

pub use klv::CHECKSUM_LEN;

pub use klv::KlvItem;

pub use klv::LocalSetItem;

pub use klv::PRECISION_TIMESTAMP_LEN;

pub use klv::TAG_CHECKSUM;

pub use klv::TAG_PRECISION_TIMESTAMP;

pub use klv::UAS_LS_KEY;

pub use klv::UNIVERSAL_LABEL_LEN;

pub use klv::UasLocalSet;

pub use klv::UniversalLabel;

pub use klv::ber_length;

pub use klv::ber_oid;

pub use klv::crc16_ccitt;

pub use klv::encode_ber_length;

pub use klv::encode_ber_oid;

pub use ll_dash::Chunk;

pub use ll_dash::LlDashPackager;

pub use ll_dash::LlSegmenter;

pub use ll_hls::LlHlsSegmenter;

pub use ll_hls::LlHlsStageOutput;

pub use ll_hls::PartInfo;

pub use ll_hls::SegmentInfo;

pub use media::CmafMux;

pub use media::Fmp4Demux;

pub use media::HlsPackager;

pub use media::Media;

pub use media::PcrSample;

pub use media::SkippedTrack;

pub use media::Track;

pub use media::TrackEncryption;

pub use mkv_mux::MkvMux;

pub use movie_fragment::MovieFragmentBox;

pub use movie_fragment::MovieFragmentHeaderBox;

pub use movie_fragment::TrackFragmentBaseMediaDecodeTimeBox;

pub use movie_fragment::TrackFragmentBox;

pub use movie_fragment::TrackFragmentHeaderBox;

pub use movie_fragment::TrackFragmentRunBox;

pub use movie_fragment::TrunSample;

pub use mp4esds::DecoderConfigDescriptor;

pub use mp4esds::DecoderSpecificInfo;

pub use mp4esds::ESDescriptor;

pub use mp4esds::EsdsBox;

pub use mp4esds::ObjectTypeIndication;

pub use mp4esds::SLConfigDescriptor;

pub use mp4esds::StreamType;

pub use mpeg_legacy::MPEG_AUDIO_SYNCWORD;

pub use mpeg_legacy::Mpeg2SeqHeader;

pub use mpeg_legacy::MpegAudioFrameHeader;

pub use mpeg_legacy::MpegAudioLayer;

pub use mpeg_legacy::SEQUENCE_HEADER_CODE;

pub use mpegh::MHA1_FOURCC;

pub use mpegh::MHA2_FOURCC;

pub use mpegh::MHAC_CONFIGURATION_VERSION;

pub use mpegh::MHAC_FOURCC;

pub use mpegh::MHAC_RECORD_FIXED_LEN;

pub use mpegh::MHADecoderConfigurationRecord;

pub use mpegh::MHM1_FOURCC;

pub use mpegh::MHM2_FOURCC;

pub use nal::NalCodec;

pub use nal::access_unit_is_keyframe;

pub use nal::access_unit_is_rap;

pub use nal::caption_cc_data;

pub use nal::is_keyframe_nal;

pub use nal::nal_unit_type;

pub use nal::recovery_point_sei;

pub use nalu_types::AvcPps;

pub use nalu_types::AvcSps;

pub use nalu_types::AvcSpsExt;

pub use nalu_types::HevcNalArray;

pub use nalu_types::HevcNalUnit;

pub use opus::ChannelMappingTable;

pub use opus::DOPS_FOURCC;

pub use opus::OPUS_FOURCC;

pub use opus::OpusSpecificBox;

pub use pipeline::CodecConfig;

pub use pipeline::FragmentTrackData;

pub use pipeline::Provenance;

pub use pipeline::Sample;

pub use pipeline::SampleFlags;

pub use pipeline::TrackSpec;

pub use pipeline::build_init_segment;

pub use pipeline::build_media_segment;

pub use pipeline::build_media_segment_with_events;

pub use progressive::ProgressiveMux;

pub use progressive_demux::ProgressiveDemux;

pub use ps_demux::PsDemux;

pub use rebase::apply_offset;

pub use rebase::insert_discontinuity_gap;

pub use rebase::rebase_to_zero;

pub use repackage::Repackage;

pub use repackage::RepackageOutput;

pub use rtmp::AmfValue;

pub use rtmp::BasicHeader;

pub use rtmp::Command;

pub use rtmp::DEFAULT_CHUNK_SIZE;

pub use rtmp::HANDSHAKE_PACKET_LEN;

pub use rtmp::Handshake0;

pub use rtmp::Handshake1;

pub use rtmp::Handshake2;

pub use rtmp::Message;

pub use rtmp::MessageHeader;

pub use rtmp::ProtocolControl;

pub use rtmp::RTMP_VERSION;

pub use rtmp::RtmpDemux;

pub use rtmp::RtmpError;

pub use rtmp::RtmpMux;

pub use rtp::DEFAULT_AUDIO_PT;

pub use rtp::DEFAULT_KLV_PT;

pub use rtp::DEFAULT_MTU;

pub use rtp::DEFAULT_VIDEO_PT;

pub use rtp::KLV_ENCODING_NAME;

pub use rtp::NAL_TYPE_IDR;

pub use rtp::RtpDepacketiser;

pub use rtp::RtpInput;

pub use rtp::RtpInputStream;

pub use rtp::RtpMediaKind;

pub use rtp::RtpOutput;

pub use rtp::RtpPacket;

pub use rtp::RtpPacketiser;

pub use rtp::RtpStream;

pub use rtp::VIDEO_CLOCK_RATE;

pub use rtp::depacketise_klv;

pub use rtp::packetise_klv;

pub use rtp_sdp::aac_config_from_asc_bytes;

pub use rtp_sdp::aac_config_from_asc_hex;

pub use rtp_sdp::aac_config_from_fmtp;

pub use rtp_sdp::avc_config_from_fmtp;

pub use rtp_sdp::avc_config_from_sprop;

pub use rtp_sdp::avc_config_from_sps_pps;

pub use rtp_sdp::fmtp_param;

pub use rtp_sdp::rtpmap_clock_rate;

pub use rtp_stream::DEFAULT_REORDER_DEPTH;

pub use rtp_stream::RtpLossEvent;

pub use rtp_stream::RtpStreamDepacketiser;

pub use rtp_stream::RtpStreamTrack;

pub use sample_aes::ExtXKey;

pub use sample_aes::HlsEncryptionMethod;

pub use sample_aes::aac_decrypt_frame;

pub use sample_aes::aac_encrypt_frame;

pub use sample_aes::ac3_decrypt_frame;

pub use sample_aes::ac3_encrypt_frame;

pub use sample_aes::aes128_decrypt_segment;

pub use sample_aes::aes128_encrypt_segment;

pub use sample_aes::h264_decrypt_nal;

pub use sample_aes::h264_encrypt_nal;

pub use sample_aes::iv_from_sequence_number;

pub use sample_entries::AVCSampleEntry;

pub use sample_entries::HEVCSampleEntry;

pub use sample_entries::Mp4vSampleEntry;

pub use sample_entries::VisualSampleEntryFields;

pub use sample_groups::GROUPING_TYPE_ROLL;

pub use sample_groups::ProducerReferenceTimeBox;

pub use sample_groups::SampleGroupDescriptionBox;

pub use sample_groups::SampleToGroupBox;

pub use sample_groups::SbgpEntry;

pub use sample_groups::SgpdEntry;

pub use sample_groups::SubSampleDescriptor;

pub use sample_groups::SubSampleInformationBox;

pub use sample_groups::SubsEntry;

pub use segmenter::SegmentMeta;

pub use segmenter::Segmenter;

pub use segments::FileTypeBox;

pub use segments::MediaDataBox;

pub use segments::SegmentTypeBox;

pub use smooth::FOURCC_AACL;

pub use smooth::FOURCC_H264;

pub use smooth::SMOOTH_TIMESCALE;

pub use smooth::SmoothFragment;

pub use smooth::SmoothOutput;

pub use smooth::SmoothPackager;

pub use smooth::SmoothStreamType;

pub use smooth::TFXD_UUID;

pub use smooth::TfxdBox;

pub use smooth_parse::C;

pub use smooth_parse::MAX_CHUNK_RUN;

pub use smooth_parse::MAX_CODEC_PRIVATE_DATA_HEX_LEN;

pub use smooth_parse::QualityLevel;

pub use smooth_parse::SmoothManifest;

pub use smooth_parse::SmoothParseError;

pub use smooth_parse::StreamIndex;

pub use smooth_parse::hex_decode as smooth_hex_decode;

pub use smooth_parse::track_spec_from_quality_level;

pub use splice::SplicePoint;

pub use splice::SpliceResult;

pub use splice::concat;

pub use splice::snap_to_preceding_sync;

pub use splice::splice_insert;

pub use sps::AvcSpsInfo;

pub use sps::HevcSpsInfo;

pub use sps::decode_avc_sps;

pub use sps::decode_hevc_sps;

pub use sps::rfc6381_avc1;

pub use sps::rfc6381_hvc1;

pub use sps::rfc6381_mp4a;

pub use subtitle_entries::CueIdBox;

pub use subtitle_entries::CuePayloadBox;

pub use subtitle_entries::CueSettingsBox;

pub use subtitle_entries::VttCueBox;

pub use subtitle_entries::VttEmptyCueBox;

pub use subtitle_entries::WebVttConfigurationBox;

pub use subtitle_entries::WvttSampleEntry;

pub use subtitle_entries::XmlSubtitleSampleEntry;

pub use timing::CompositionOffsetBox;

pub use timing::CompositionToDecodeBox;

pub use timing::CttsEntry;

pub use timing::EditListBox;

pub use timing::EditListEntry;

pub use timing::SegmentIndexBox;

pub use timing::SidxReference;

pub use timing::SttsEntry;

pub use timing::TimeToSampleBox;

pub use trickplay::append_iframe_track;

pub use trickplay::derive_iframe_track;

pub use ts_demux::AbandonReason;

pub use ts_demux::DemuxEvent;

pub use ts_demux::DiscontinuityKind;

pub use ts_demux::EventProvenance;

pub use ts_demux::InputDegradation;

pub use ts_demux::StreamingTsDemux;

pub use ts_demux::TsDemux;

pub use ts_hls::StreamingTsHlsSegmenter;

pub use ts_hls::TsHlsOutput;

pub use ts_hls::TsHlsPackager;

pub use ts_hls::TsSegment;

pub use ts_mux::TsMux;

pub use validate::ConformanceIssue;

pub use validate::Severity;

pub use validate::validate_cmaf_track;

pub use validate::validate_init_segment;

pub use validate::validate_media_segment;

pub use visual_ext::CleanApertureBox;

pub use visual_ext::ColourInformationBox;

pub use visual_ext::NclxColourInfo;

pub use visual_ext::PixelAspectRatioBox;

pub use vp9::VP09_FOURCC;

pub use vp9::VPCC_FOURCC;

pub use vp9::Vp9ConfigurationBox;

pub use vp9::Vp9SampleEntry;

pub use vvc_config::VvcConfigurationBox;

pub use vvc_config::VvcDecoderConfigurationRecord;

pub use vvc_config::VvcNalArray;

pub use vvc_config::VvcNalUnitType;

pub use vvc_config::VvcPtlRecord;

pub use webm_demux::IR_TIMESCALE;

pub use webm_demux::WebmDemux;

Modules

aac_asc

AAC AudioSpecificConfig (ASC) — ISO/IEC 14496-3:2001 §1.6.2.1 Table 1.8.

ac3

AC-3 and Enhanced AC-3 in ISOBMFF — ETSI TS 102 366 Annex F.

ac4

AC-4 in ISOBMFF — ac-4 AudioSampleEntry + dac4 config box.

annexb

Annex B ↔ length-prefixed NAL conversion — ITU-T H.264 Annex B / ISO/IEC 14496-15 §5.3.4.

au

Streaming Annex B byte stream → access-unit splitter — ITU-T H.264 §7.4.1.2 (access unit detection), ITU-T H.265 §7.4.2.4.4, ITU-T H.266 §7.4.2.4.3.

av1

AV1 in ISOBMFF — av01 VisualSampleEntry + av1C config box.

avc_config

AVC decoder configuration record (avcC) — ISO/IEC 14496-15:2017 §5.3.3.

bitreader

Exp-Golomb bit reader over an RBSP byte stream.

box_types

ISOBMFF Box/FullBox layer — ISO/IEC 14496-12:2015 §4.2.

cenc

Common Encryption boxes — ISO/IEC 23001-7 (CENC) + ISO/IEC 14496-12:2015 §8.12.

cenc_decrypt

CENC decrypt — unprotect a Common-Encryption fMP4 (ISO/IEC 23001-7).

cenc_encrypt

CENC/CBCS sample encryption — CencEncryptor (issue #564).

cli

transmux command-line packager — the any-to-any hub as a CLI (issue #482).

dash

DASH .mpd Media Presentation Description generation — ISO/IEC 23009-1.

dash_parse

DASH .mpd Media Presentation Description parser — ISO/IEC 23009-1 — the structural inverse of crate::dash’s DashPackager writer.

drm

Multi-DRM pssh init-data payload generation.

dts

DTS audio in ISOBMFF — dtsc/dtsh/dtsl/dtse AudioSampleEntry + ddts config box.

error

Error type returned by every parser and builder in this crate.

flac

FLAC in ISOBMFF — fLaC AudioSampleEntry + dfLa config box.

flv

FLV (Flash Video) container spoke — Adobe Flash Video File Format Specification v10.1, Annex E; see transmux/docs/codec/flv.md.

flv_stream

Streaming (incremental) FLV → samples demux for live RTMP ingest (#738), mirroring StreamingTsDemux (issue #555) for the FLV container (Adobe FLV v10.1 Annex E — see transmux/docs/codec/flv.md and crate::flv for the wire layout).

hevc_config

HEVC decoder configuration record (hvcC) — ISO/IEC 14496-15:2017 §8.3.3.

init_segment

Typed init-segment (moov) box tree — ISO/IEC 14496-12:2015 §8.2–8.7.

ir

The transmux media intermediate representation (IR).

klv

KLV (Key-Length-Value) timed metadata — SMPTE ST 336 framing + MISB ST 0601 UAS Datalink Local Set.

ll_dash

Low-latency DASH — chunked CMAF packaging + LL-DASH MPD signalling.

ll_hls

Low-Latency HLS — partial segments (CMAF chunks) + playlist directives.

media

The any-to-any hub impls over the crate::ir media IR.

mkv_mux

Matroska (MKV) container muxer — MkvMux.

movie_fragment

Movie Fragment boxes - ISO/IEC 14496-12:2015 §8.8.

mp4esds

MPEG-4 elementary-stream descriptor chain (esds box) — ISO/IEC 14496-1:2010 §7.2.6 / ISO/IEC 14496-14:2003 §5.6.

mpeg_legacy

Legacy-codec elementary-stream headers: MPEG-2 video (H.262) sequence header and MPEG-1/2 audio (MP1/2/3) frame header.

mpegh

MPEG-H 3D Audio in ISOBMFF — mha1/mhm1 + mhaC (ISO/IEC 23008-3 §20).

nal

NAL-unit-type classification + IDR/IRAP keyframe detection for AVC/HEVC/VVC.

nalu_types

NAL unit byte-slice newtypes and typed arrays for AVC/HEVC decoder config records.

opus

Opus in ISOBMFF — Opus AudioSampleEntry + dOps config box.

pipeline

TS → CMAF/fMP4 remux pipeline — the muxer above the box builders.

progressive

Progressive (single-file, non-fragmented) MP4 packager — ISO/IEC 14496-12:2015 §8.

progressive_demux

Progressive (single-file, non-fragmented) MP4 demux — ISO/IEC 14496-12:2015 §8.5–§8.7.

ps_demux

MPEG-2 Program Stream demuxer → hub Media IR.

rebase

Timeline-conditioning transforms over the Media IR — PTS/DTS rebase, offset, and discontinuity-gap insertion (issue #476).

repackage

fMP4/CMAF repackaging — IR transforms + a driver (ISO/IEC 14496-12; CMAF ISO/IEC 23000-19).

rtcp

RTCP — RTP Control Protocol (RFC 3550 §6).

rtmp

RTMP (Adobe Real-Time Messaging Protocol) 1.0 transport spoke.

rtp

RTP de/packetisation + SDP — RFC 3550 / RFC 6184 / RFC 3640 / RFC 4566.

rtp_sdp

SDP fmtp/rtpmap → transmux CodecConfig (RFC 4566 §5.14/§6, RFC 6184 §8.1, RFC 3640 §4.1).

rtp_stream

Streaming RTP depayloader — RFC 6184 (H.264) / RFC 3640 (AAC).

sample_aes

HLS Sample-AES + full-segment AES-128 content protection.

sample_entries

AVC/HEVC sample entries and their config boxes — ISO/IEC 14496-15:2017 §5.4, §8.4.

sample_groups

ProducerReferenceTimeBox, SampleGroupDescriptionBox, SampleToGroupBox, and SubSampleInformationBox — ISO/IEC 14496-12:2015 §8.16.5, §8.9.2, §8.9.3, §8.7.7.

segmenter

Stateful CMAF segmenter — a streaming wrapper over build_init_segment and build_media_segment.

segments

Segment-level ISOBMFF boxes — ISO/IEC 14496-12:2015.

smooth

Microsoft Smooth Streaming (ISM/PIFF) output — [MS-SSTR].

smooth_parse

Microsoft Smooth Streaming ([MS-SSTR]) client manifest parser + CodecPrivateData codec glue — the structural inverse of crate::smooth::SmoothPackager’s writer.

splice

IR-level timeline splice / concatenation → server-side ad insertion (SSAI), operating on the Media IR before muxing (issue #475).

sps

H.264 / H.265 sequence parameter set (SPS) decode.

subtitle_entries

ISO/IEC 14496-30 subtitle sample entries — stpp (TTML/IMSC) and wvtt (WebVTT).

timing

Sample-timing and segment-index boxes — ISO/IEC 14496-12:2015 §8.6/§8.16.

trickplay

I-frame-only (trick-play / thumbnail) track derivation from a video track.

ts_demux

MPEG-2 Transport Stream demuxer → hub Media IR.

ts_hls

Classic HLS with MPEG-2 TS media segments — RFC 8216 + ISO/IEC 13818-1.

ts_mux

Hub Media IR → MPEG-2 Transport Stream muxer (the output TS spoke).

validate

fMP4 / CMAF structural conformance validator — the fMP4 analogue of a TR 101 290 monitor.

visual_ext

Visual sample-entry extension boxes — ISO/IEC 14496-12:2015 §12.1.4–5.

vp9

VP9 in ISOBMFF — vp09 VisualSampleEntry + vpcC config box.

vvc_config

VVC / H.266 decoder configuration record (vvcC) — ISO/IEC 14496-15:2022 §11.

webm_demux

WebM / Matroska (EBML) demuxer — WebM byte stream → the Media IR.

Structs

App

RTCP Application-defined packet (RFC 3550 §6.7, PT 204).

Bye

RTCP Goodbye (RFC 3550 §6.6, PT 203).

CommonHeader

The 4-byte RTCP common header shared by every packet type (RFC 3550 §6.1).

CompoundPacket

A compound RTCP packet (RFC 3550 §6.1): a sequence of RTCP packets sent in a single lower-layer datagram. The first packet must be a report (SR or RR); this is validated on both parse and serialize.

EmsgBox

A parsed/owned MPEG-DASH Event Message Box (emsg).

ReceiverReport

RTCP Receiver Report (RFC 3550 §6.4.2, PT 201).

ReportBlock

A reception report block (RFC 3550 §6.4.1, 24 bytes). Carried by both SR and RR, one per reported source.

SdesChunk

An SDES chunk: an SSRC/CSRC plus its list of items (RFC 3550 §6.5).

SdesItem

A single SDES item: a typed, length-prefixed text field (RFC 3550 §6.5).

SenderReport

RTCP Sender Report (RFC 3550 §6.4.1, PT 200).

SourceDescription

RTCP Source Description (RFC 3550 §6.5, PT 202).

Enums

CencScheme

A CENC protection scheme (schm.scheme_type) — ISO/IEC 23001-7 §4.

EmsgVersion

The version byte of the 'emsg' FullBox (DASH-IF Part 10 Table 6-2).

PresentationTime

The version-discriminated presentation-time field (DASH-IF Part 10 Table 6-2): the only field whose type and reference point differ by version.

RtcpPacket

Any single RTCP packet, dispatched by its common-header PT byte (RFC 3550 §6).

RtcpPacketType

The RTCP packet type carried in the common header PT byte (RFC 3550 §6).

SdesItemType

SDES item type (RFC 3550 §6.5). Byte-valued; type 0 is the item terminator.

Constants

APP_NAME_LEN

Length of the APP name field — 4 ASCII characters (RFC 3550 §6.7).

PT_APP

Packet type: Application-defined (RFC 3550 §6.7).

PT_BYE

Packet type: Goodbye (RFC 3550 §6.6).

PT_RECEIVER_REPORT

Packet type: Receiver Report (RFC 3550 §6.4.2).

PT_SENDER_REPORT

Packet type: Sender Report (RFC 3550 §6.4.1).

PT_SOURCE_DESCRIPTION

Packet type: Source Description (RFC 3550 §6.5).

REPORT_BLOCK_LEN

Length of a single ReportBlock on the wire (RFC 3550 §6.4.1).

SDES_CNAME

SDES item type value: CNAME (RFC 3550 §6.5.1).

SDES_EMAIL

SDES item type value: EMAIL (RFC 3550 §6.5.3).

SDES_LOC

SDES item type value: LOC (RFC 3550 §6.5.5).

SDES_NAME

SDES item type value: NAME (RFC 3550 §6.5.2).

SDES_NOTE

SDES item type value: NOTE (RFC 3550 §6.5.7).

SDES_PHONE

SDES item type value: PHONE (RFC 3550 §6.5.4).

SDES_PRIV

SDES item type value: PRIV (RFC 3550 §6.5.8).

SDES_TOOL

SDES item type value: TOOL (RFC 3550 §6.5.6).