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ff-stream

Produce HLS and DASH adaptive bitrate output from any video source. Define a rendition ladder, point it at an input file, and receive a standards-compliant package ready for CDN delivery.

Installation

[dependencies]

ff-stream = "0.6"

HLS Output

use ff_stream::{HlsOutput, AbrLadder, Rendition};

let ladder = AbrLadder::new("source.mp4")
    .rendition(Rendition { width: 1920, height: 1080, bitrate: 6_000_000 })
    .rendition(Rendition { width: 1280, height: 720,  bitrate: 3_000_000 })
    .rendition(Rendition { width: 854,  height: 480,  bitrate: 1_500_000 })
    .rendition(Rendition { width: 640,  height: 360,  bitrate:   800_000 });

let output = HlsOutput::new("hls_output/");
output.run(&ladder)?;
// Writes hls_output/master.m3u8 and per-rendition segment directories.

DASH Output

use ff_stream::{DashOutput, AbrLadder, Rendition};

let ladder = AbrLadder::new("source.mp4")
    .rendition(Rendition { width: 1920, height: 1080, bitrate: 6_000_000 })
    .rendition(Rendition { width: 1280, height: 720,  bitrate: 3_000_000 });

let output = DashOutput::new("dash_output/");
output.run(&ladder)?;
// Writes dash_output/manifest.mpd and per-rendition segment directories.

Rendition Ladder

AbrLadder defines the set of quality levels to produce. Each Rendition specifies the output resolution and target bitrate. The ladder is shared by both HlsOutput and DashOutput.

Field	Type	Description
`width`	`u32`	Output frame width in pixels
`height`	`u32`	Output frame height in pixels
`bitrate`	`u64`	Target video bitrate in bits per second

Error Handling

Variant	When it occurs
`StreamError::InvalidConfig`	Missing input, empty ladder, or conflicting options
`StreamError::Encode`	Wrapped `EncodeError` from a rendition encode stage
`StreamError::Io`	Write failure on the output directory

MSRV

Rust 1.93.0 (edition 2024).

License

MIT OR Apache-2.0

ff-stream 0.7.0