CREATE TABLE hls_transcode_queue (
    id BIGSERIAL PRIMARY KEY,
    track_id BIGINT NOT NULL REFERENCES tracks(id) ON DELETE CASCADE,
    priority INTEGER NOT NULL DEFAULT 5,
    status VARCHAR(20) NOT NULL DEFAULT 'pending',
    retry_count INTEGER NOT NULL DEFAULT 0,
    max_retries INTEGER NOT NULL DEFAULT 3,
    error_message TEXT,
    created_at TIMESTAMP NOT NULL DEFAULT NOW(),
    started_at TIMESTAMP,
    completed_at TIMESTAMP
);

CREATE INDEX idx_hls_transcode_queue_status ON hls_transcode_queue(status, priority DESC);
CREATE INDEX idx_hls_transcode_queue_track_id ON hls_transcode_queue(track_id);