[FFmpeg-devel] ffmpeg can't get video rotate info

[new99y at 163.com]

ffmpeg can't get video rotate info, 5.0 - 6.1.1 version all can't get video rotate info 
                tag = av_dict_get(m_pVideoSt->metadata, "rotate", tag, 0);
if (tag)
{
m_Rotate = atoi(tag->value);
}

   tag is NULL