编译Android平台OpenCV，用到读取视频时报错：
ld: error: undefined symbol: AMediaExtractor_new
ld: error: undefined symbol: AMediaExtractor_setDataSourceFd
ld: error: undefined symbol: AMediaExtractor_getTrackCount
ld: error: undefined symbol: AMediaExtractor_getTrackFormat
ld: error: undefined symbol: AMediaFormat_toString
ld: error: undefined symbol: AMEDIAFORMAT_KEY_MIME
ld: error: undefined symbol: AMediaFormat_getString
ld: error: undefined symbol: AMEDIAFORMAT_KEY_WIDTH
ld: error: undefined symbol: AMediaFormat_getInt32
ld: error: undefined symbol: AMEDIAFORMAT_KEY_HEIGHT
ld: error: undefined symbol: AMediaExtractor_selectTrack
ld: error: undefined symbol: AMediaCode