s="nd">@property</span>
    <span class="k">def</span><span class="w"> </span><span class="nf">audio_tracks</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
        <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">stack</span><span class="o">.</span><span class="n">audio_tracks</span>

    <span class="nd">@property</span>
    <span class="k">def</span><span class="w"> </span><span class="nf">video_tracks</span><span class="