><a href="https://github.com/shinyoshiaki/werift-webrtc/blob/8a77e73/packages/webrtc/src/media/track.ts#L11" target="_blank" rel="noopener noreferrer">packages/webrtc/src/media/track.ts:11</a></p><hr><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_2LWZ" id="rid"></a>rid<a class="hash-link" href="#rid" title="Ë¶ãÂá∫„Åó„Å∏„ÅÆÁõ¥Êé•„É™„É≥„ÇØ">#</a></h3><p>‚Ä¢ <code>Optional</code> <strong>rid</strong>: <code>string</code></p><h4><a aria-hidden="