SCG82

                        //"avcoti" hexadecimal representation of the following three bytes in the (subset) sequence parameter set Network Abstraction Layer (NAL) unit specified in AVC:  1.profile_idc, 2.the byte containing the constraint_set flags (currently constraint_set0_flag through constraint_set5_flag, and the reserved_zero_2bits), 3.level_idc.
AVC1_CODEC_MAP = {                  
 ,"avc1.66.30":   {profile:"Baseline", level:3.0, max_bit_rate:10000}   //iOS friendly variation (iOS 3.0-3.1.2)
  "avc1.42001e":  {profile:"Baseline", level:3.0, max_bit_rate:10000}
 ,"avc1.42001f":  {profile:"Baseline", level:3.1, max_bit_rate:14000}

//other variations
 ,"avc1.77.30":   {profile:"Main",     level:3.0, max_bit_rate:10000}   //iOS friendly variation (iOS 3.0-3.1.2)
 ,"avc1.4d001e":  {profile:"Main",     level:3.0, max_bit_rate:10000}
 ,"avc1.4d001f":  {profile:"Main",     level:3.1, max_bit_rate:14000}

SCG82

const shuffleArray = function(array) {
    const a = array.slice();

    for (let i = a.length - 1; i > 0; i--) {
        const j = Math.floor(Math.random() * (i + 1));
        [a[i], a[j]] = [a[j], a[i]];
    }

    return a;
};