ocalDescription;
                document.getElementById('recv-text').value = JSON.stringify({
                    type: answer.type,
                    sdp: answer.sdp
                });
                document.getElementById('recv-help').value = 'Please paste the answer in the application.';
                alert('Please paste the answer in the application.');
            }
        }

        let trackCount = 0;
        pc.ontrack = (evt) => {
            const id = trackCount++;
            document.g