Struct PacketBuilder 

pub struct PacketBuilder { /* private fields */ }

A stateful helper for building correctly-timestamped CodecPackets.

Create one builder per stream. Call build_video_frame for each video frame or build_audio_frame for each audio frame; the builder tracks the running PTS/DTS automatically.

Implementations

impl PacketBuilder

pub fn new(stream_index: u32, time_base: (u32, u32), fps: f32) -> Self

Create a new builder.

• stream_index: stream index embedded into every packet.
• time_base: (numerator, denominator) of the stream time base.
• fps: frame rate; used to compute frame_duration.

frame_duration is computed as round(time_base.denominator / (fps * time_base.numerator)), clamped to at least 1.

pub fn build_video_frame( &mut self, data: Vec<u8>, keyframe: bool, ) -> CodecPacket

Build a video frame packet and advance the timestamp counters.

The PTS and DTS of the returned packet reflect the state before the counters are advanced, so the first packet always has PTS/DTS = 0.

pub fn build_audio_frame(&mut self, data: Vec<u8>, samples: u32) -> CodecPacket

Build an audio frame packet.

samples is the number of PCM samples in the frame. The duration is derived from samples * time_base.numerator / sample_rate, but since PacketBuilder is not audio-sample-rate aware, the caller should pass the actual per-frame sample count and the method uses frame_duration as a fallback when samples == 0.

For audio the keyframe flag is always false (all audio frames are independently decodable).

pub fn next_pts(&self) -> u64

Return the current PTS counter (PTS that will be assigned to the next packet).

pub fn frame_duration(&self) -> u32

Return the current frame duration in time-base units.