问改变<Video>宽度

EN

 stop.onclick = function () {
    record.disabled = false;
    stop.disabled = true;
    window.onbeforeunload = null; //Solve trouble with deleting video
    preview.src = '';

    fileName = Math.round(Math.random() * 99999999) + 99999999;
    console.log(fileName);
    if (!isFirefox) {
        recordAudio.stopRecording(function () {
            //PostBlob(recordAudio.getBlob(), 'audio', fileName + '.wav');
        });
    } else {
        recordAudio.stopRecording(function (url) {
            preview.src = url;
            //PostBlob(recordAudio.getBlob(), 'video', fileName + '.webm');
        });
    }

    if (!isFirefox) {
        recordVideo.stopRecording(function () {
            PostBlob(recordVideo.getBlob(), 'video', fileName + '.webm');
        });
    }

 if (!isFirefox) {
        recordVideo.stopRecording(function () {
            PostBlob(recordVideo.getBlob(), 'video', fileName + '.webm');
        });
    }