currentCall.getStats(function (stats) {
            if (stats && stats.outboundStream) {
                if (stats.outboundStream.videoStats) {
                    $('#videoStatBytesSent').text(stats.outboundStream.videoStats.bytesSent);
                    $('#videoStatPacketsSent').text(stats.outboundStream.videoStats.packetsSent);
                    $('#videoStatFramesEncoded').text(stats.outboundStream.videoStats.framesEncoded);
                } else {
                    ...
                }

                if (stats.outboundStream.audioStats) {
                    $('#audioStatBytesSent').text(stats.outboundStream.audioStats.bytesSent);
                    $('#audioStatPacketsSent').text(stats.outboundStream.audioStats.packetsSent);
                } else {
                    ...
                }
            }
        });