API函数wx.chooseVideo（Objectobject)的参数属性（)用于设置默认拉起的是前置或者后置摄像头

A.sourceType

B.compressed

C.maxDuration

D.camera

A.sourceType

B.compressed

C.maxDuration

D.camera

A.accuracy

B.altitude

C.verticalAccuracy

D.horizontalAccuracy

A.title

B.content

C.showCancel

D.cancelText

A.['album','camera']

B.'album'

C.'camera'

A.['original','compressed']

B.'original'

C.'compressed'

A.scale

B.name

C.address

D.success

A.3

B.6

C.9

D.12

A.title

B.icon

C.image

D.duration