wx.chooseMedia({

    count: multiple ? Math.min(maxCount, 9) : 1,

    mediaType: ['video', 'image'],

// mediaType: ['image'],

// mediaType: ['video'],

    // mediaType: mediaType,

    sourceType: capture,

    maxDuration: maxDuration,

    sizeType: sizeType,

    camera: camera,

    success: function (res) { return resolve(formatMedia(res)); },

    fail: reject,

});