ffmpeg 获取和设置视频旋转角度

AVDictionaryEntry *tag = NULL;
tag = av_dict_get(m_pVideoStream->metadata, "rotate", tag, 0);
if (tag == NULL)
{
m_Rotate = MT_VIDEO_ROTATE_0;
}
else
{
int angle = atoi(tag->value);
angle %= 360;
if (angle == 90)
{
m_Rotate = MT_VIDEO_ROTATE_90;
}
else if (angle == 180)
{
m_Rotate = MT_VIDEO_ROTATE_180;
}
else if (angle == 270)
{
m_Rotate = MT_VIDEO_ROTATE_270;
}
else
{
m_Rotate = MT_VIDEO_ROTATE_0;
}
}

设置旋转角度

ret = av_dict_set(&m_pDstVideoStream->metadata,"rotate","90",0);

open之前设置

//////////////////////////////////////////////////////////////////////////
class CStudent
{
public:
CStudent(const char* pInputName,int id)
{
int nLen = strlen(pInputName);
m_pName = new char[nLen + 1];
strcpy(m_pName,pInputName);
m_ID = id;
}
~CStudent()
{
delete [] m_pName;
}
void SetID(int id)
{
m_ID = id;
}
int GetID()
{
return m_ID;
}
private:
char* m_pName;
int m_ID;
};

int main()
{
CStudent A("Joy",10001);
CStudent B("Lily",10002);

//Swap ID
CStudent nTempC = A;
A.SetID(B.GetID());
B.SetID(nTempC.GetID());

return 0;
}