A Rust library for parsing m3u8 playlists (HTTP Live Streaming) link.
Uses the nom library for all of the parsing.
To use this library, add the following dependency to Cargo.toml:
[dependencies]
m3u8-rs = "1.0.0"And add the crate to lib.rs
extern crate m3u8_rs;Also available on crates.io
Available here
A simple example of parsing a playlist:
use m3u8_rs::playlist::Playlist;
use std::io::Read;
let mut file = std::fs::File::open("playlist.m3u8").unwrap();
let mut bytes: Vec<u8> = Vec::new();
file.read_to_end(&mut bytes).unwrap();
let parsed = m3u8_rs::parse_playlist_res(&bytes);
match parsed {
Ok(Playlist::MasterPlaylist(pl)) => println!("Master playlist:\n{}", pl),
Ok(Playlist::MediaPlaylist(pl)) => println!("Media playlist:\n{}", pl),
Err(e) => println!("Error: {:?}", e)
}In the example above, parse_playlist_res(&bytes) returns a Result<Playlist, IResult>. It uses
the output of parse_playlist(&bytes) behind the scenes and just converts the IResult to a Result.
Here is an example of using the parse_playlist(&bytes) with IResult directly:
use m3u8_rs::playlist::Playlist;
use std::io::Read;
use nom::IResult;
let mut file = std::fs::File::open("playlist.m3u8").unwrap();
let mut bytes: Vec<u8> = Vec::new();
file.read_to_end(&mut bytes).unwrap();
let parsed = m3u8_rs::parse_playlist(&bytes);
match parsed {
IResult::Done(i, Playlist::MasterPlaylist(pl)) => println!("Master playlist:\n{}", pl),
IResult::Done(i, Playlist::MediaPlaylist(pl)) => println!("Media playlist:\n{}", pl),
IResult::Error(e) => panic!("Parsing error: \n{}", e),
IResult::Incomplete(e) => panic!("Parsing error: \n{:?}", e),
}Currently the parser will succeed even if REQUIRED attributes/tags are missing from a playlist (such as the #EXT-X-VERSION tag).
The option to abort parsing when attributes/tags are missing may be something to add later on.
All of the details about the structs are taken from https://tools.ietf.org/html/draft-pantos-http-live-streaming-19.
// Short summary of the important structs in playlist.rs:
//
pub enum Playlist {
MasterPlaylist(MasterPlaylist),
MediaPlaylist(MediaPlaylist),
}
pub struct MasterPlaylist {
pub version: usize,
pub variants: Vec<VariantStream>,
pub session_data: Option<SessionData>,
pub session_key: Option<SessionKey>,
pub start: Option<Start>,
pub independent_segments: bool,
}
pub struct MediaPlaylist {
pub version: usize,
pub target_duration: f32,
pub media_sequence: i32,
pub segments: Vec<MediaSegment>,
pub discontinuity_sequence: i32,
pub end_list: bool,
pub playlist_type: MediaPlaylistType,
pub i_frames_only: bool,
pub start: Option<Start>,
pub independent_segments: bool,
}
pub struct VariantStream {
pub is_i_frame: bool,
pub uri: String,
pub bandwidth: String,
pub average_bandwidth: Option<String>,
pub codecs: String,
pub resolution: Option<String>,
pub frame_rate: Option<String>,
pub audio: Option<String>,
pub video: Option<String>,
pub subtitles: Option<String>,
pub closed_captions: Option<String>,
pub alternatives: Vec<AlternativeMedia>,
}
pub struct MediaSegment {
pub uri: String,
pub duration: f32,
pub title: Option<String>,
pub byte_range: Option<ByteRange>,
pub discontinuity: bool,
pub key: Option<Key>,
pub map: Option<Map>,
pub program_date_time: Option<String>,
pub daterange: Option<String>,
}
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