zmpeg

MPEG-1 Video decoder, MP2 Audio decoder, MPEG-PS demuxer in Zig. Port of pl_mpeg.

Quick Start

zig build
ffmpeg -i video.mp4 -q:v 2 -q:a 2 -f mpeg video.mpg
./zig-out/bin/player video.mpg

Library Usage

High-Level API (Recommended)

const zmpeg = @import("zmpeg");

var mpeg = try zmpeg.createFromFile(allocator, "video.mpg");
defer mpeg.deinit();

var player = zmpeg.Player.init(mpeg);
player.setVideoCallback(onVideo, userdata);
player.setAudioCallback(onAudio, userdata);

// In your loop:
try player.decode(elapsed_seconds, audio_queued_seconds);

Low-Level API

// Decode video manually
if (mpeg.video_decoder) |video| {
    while (video.decode()) |frame| {
        // frame.y, frame.cb, frame.cr
    }
}

// Decode audio manually
if (mpeg.audio_decoder) |audio| {
    while (try audio.decode()) |samples| {
        // samples.interleaved
    }
}

Input Methods

// From file
const mpeg = try zmpeg.createFromFile(allocator, "video.mpg");

// From memory
const mpeg = try zmpeg.createFromMemory(allocator, data);

// Custom reader (streaming)
var reader = try zmpeg.BitReader.initAppend(allocator, 1024);
const mpeg = try zmpeg.createWithReader(allocator, &reader);

See src/main.zig for a complete SDL2 player example.