Struct Multitrack 

pub struct Multitrack {
    pub multitrack_type: u8,
    pub tracks: Vec<MultitrackTrack>,
}

Decoded Multitrack body of an Enhanced RTMP v2 video or audio message (enhanced-rtmp-v2.pdf §“ExVideoTagBody” / §“ExAudioTagBody”). The decoded view sits in VideoTag::multitrack / AudioTag::multitrack; when present, the tag’s VideoTag::ex_packet_type / AudioTag::ex_packet_type holds the real (inner) PacketType the tracks carry (e.g. CodedFrames, SequenceStart), and the tag’s VideoTag::fourcc / AudioTag::audio_fourcc holds the shared FourCC when multitrack_type is OneTrack or ManyTracks. For ManyTracksManyCodecs the outer FourCC is None (each track carries its own).

The VideoTag::body / AudioTag::body field is unused for multitrack tags — track payloads live inside MultitrackTrack::body.

Fields

multitrack_type: u8

AvMultitrackType discriminator (one of AV_MULTITRACK_TYPE_*). Reserved values (3..=15) round-trip verbatim — the parser does not reject them, so a forwarding ingest preserves unknown future modes.

tracks: Vec<MultitrackTrack>

Decoded per-track entries in stream order. Always at least 1 entry after a successful parse.

Implementations

impl Multitrack

pub fn parse(body: &[u8], multitrack_type: u8) -> Result<Multitrack>

Parse the multitrack track-list bytes (everything in VideoTag::body / AudioTag::body after parse_video / parse_audio stripped the per-tag header) given the outer multitrack_type. Returns Err(Error::Other) on truncation or on a track whose sizeOfTrack UI24 overruns the buffer.

OneTrack mode produces exactly one track whose body runs to the end of the buffer. ManyTracks and ManyTracksManyCodecs modes loop while bytes remain, consuming a UI24 sizeOfTrack per track.

pub fn encode(&self) -> Vec<u8>

Serialise to the byte layout parse consumes. Output goes into the tag’s VideoTag::body / AudioTag::body slot when building an outgoing multitrack message.

For OneTrack mode only the first track’s track_id + body are emitted (the second-and-beyond tracks are silently ignored — the caller is responsible for using ManyTracks if it has more than one). For ManyTracksManyCodecs each track’s fourcc MUST be Some(..); a None is encoded as four zero bytes to keep the output decodable but the caller should treat that as a bug.

Trait Implementations

impl Clone for Multitrack

fn clone(&self) -> Multitrack

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Multitrack

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for Multitrack

impl PartialEq for Multitrack

fn eq(&self, other: &Multitrack) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for Multitrack