@vikasietum_tecknology/record-rtc/simple-demos/gif-recording.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;
    }
</style>

<title>Gif Recording | RecordRTC</title>
<h1>Simple Gif Recording using RecordRTC</h1>

<br>

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

<hr>
<img>

<script src="/RecordRTC.js"></script>
<script src="https://www.webrtc-experiment.com/gif-recorder.js"></script>
<script>
var image = document.querySelector('img');

function captureCamera(callback) {
    navigator.mediaDevices.getUserMedia({ video: true }).then(function(camera) {
        callback(camera);
    }).catch(function(error) {
        alert('Unable to capture your camera. Please check console logs.');
        console.error(error);
    });
}

function stopRecordingCallback() {
    document.querySelector('h1').innerHTML = 'Gif recording stopped: ' + bytesToSize(recorder.getBlob().size);
    image.src = URL.createObjectURL(recorder.getBlob());
    recorder.camera.stop();
    recorder.destroy();
    recorder = null;
}

var recorder; // globally accessible

document.getElementById('btn-start-recording').onclick = function() {
    this.disabled = true;
    captureCamera(function(camera) {
        document.querySelector('h1').innerHTML = 'Waiting for Gif Recorder to start...';
        recorder = RecordRTC(camera, {
            type: 'gif',
            frameRate: 1,
            quality: 10,
            width: 360,
            height: 240,
            onGifRecordingStarted: function() {
                document.querySelector('h1').innerHTML = 'Gif recording started.';
            },
            onGifPreview: function(gifURL) {
                image.src = gifURL;
            }
        });

        recorder.startRecording();

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

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

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

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