@vikasietum_tecknology/record-rtc/simple-demos/seeking-workaround.html

record-rtc is a library based on recordrtc library. In this forked version of the original library we have optimized the memory management. The video recording is stored in IndexDB in chunks.

<style>
    html, body {
        margin: 0!important;
        padding: 0!important;
        text-align: center;
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Fira Sans", "Droid Sans", "Helvetica Neue", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
        font-size: 1em;
    }

    video {
        width: 30%;
        border-radius: 5px;
        border: 1px solid black;
    }
</style>

<title>Seeking Workaround | RecordRTC</title>
<h1>Seeking Workaround for RecordRTC</h1>

<br>

<button id="btn-start-recording">Start Recording</button>
<button id="btn-stop-recording" disabled>Stop Recording</button>

<hr>
<video controls autoplay playsinline></video>

<script src="/RecordRTC.js"></script>
<script src="https://www.webrtc-experiment.com/EBML.js"></script>           <!-- ../libs/DBML.js -->

<script>
var video = document.querySelector('video');

function captureStream(callback) {
    navigator.mediaDevices.getUserMedia({video:true,audio:true}).then(function(stream) {
        callback(stream);
    }).catch(function(error) {
        console.error(error);
        alert('Unable to capture your stream. Please check console logs.\n' + error);
    });
}

function stopRecordingCallback() {
    video.muted = false;
    video.volume = 1;

    video.src = video.srcObject = null;

    getSeekableBlob(recorder.getBlob(), function(seekableBlob) {
        video.src = URL.createObjectURL(seekableBlob);

        recorder.stream.stop();
        recorder.destroy();
        recorder = null;

        document.getElementById('btn-start-recording').disabled = false;

        invokeSaveAsDialog(seekableBlob, 'seekable-recordrtc.webm');
    });
}

var recorder; // globally accessible

document.getElementById('btn-start-recording').onclick = function() {
    this.disabled = true;
    captureStream(function(stream) {
        video.muted = true;
        video.volume = 0;
        video.srcObject = stream;

        recorder = RecordRTC(stream, {
            type: 'video'
        });

        recorder.startRecording();

        // release stream on stopRecording
        recorder.stream = stream;

        document.getElementById('btn-stop-recording').disabled = false;
    });
};

document.getElementById('btn-stop-recording').onclick = function() {
    this.disabled = true;
    recorder.stopRecording(stopRecordingCallback);
};

function addStreamStopListener(stream, callback) {
    stream.addEventListener('ended', function() {
        callback();
        callback = function() {};
    }, false);
    stream.addEventListener('inactive', function() {
        callback();
        callback = function() {};
    }, false);
    stream.getTracks().forEach(function(track) {
        track.addEventListener('ended', function() {
            callback();
            callback = function() {};
        }, false);
        track.addEventListener('inactive', function() {
            callback();
            callback = function() {};
        }, false);
    });
}
</script>

<br><br>

<footer style="margin-top: 20px; text-align: left;">
    <small id="send-message"></small>
</footer>
<script src="https://www.webrtc-experiment.com/common.js"></script>