cv::VideoCapture ignores orientation metadata #15499
Description
For some videos, using get() to get VideoCapture's width/height property, the results are not correct (the width and height are swapped).
I found that there is a rotate tag in the video metadata (ref. link ffmpeg get orientation inverted), e.g.,
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isommp42
creation_time : 2019-09-10T04:58:23.000000Z
location : +31.2664+120.7302/
location-eng : +31.2664+120.7302/
com.android.version: 10
Duration: 00:00:25.15, start: 0.000000, bitrate: 42894 kb/s
Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, bt470bg/bt470bg/smpte170m), 3840x2160, 42808 kb/s, SAR 1:1 DAR 16:9, 30.01 fps, 30 tbr, 90k tbn, 180k tbc (default)
Metadata:
rotate : 90
creation_time : 2019-09-10T04:58:23.000000Z
handler_name : VideoHandle
Side data:
displaymatrix: rotation of -90.00 degrees
Could this issue be considered in future releases?