if ( p_vout->p_sys->p_opencv )
{
//release the internal opencv filter
if( p_vout->p_sys->p_opencv->p_module )
module_Unneed( p_vout->p_sys->p_opencv, p_vout->p_sys->p_opencv->p_module );
vlc_object_detach( p_vout->p_sys->p_opencv );
if ( p_vout->p_sys->p_opencv )
{
//release the internal opencv filter
if( p_vout->p_sys->p_opencv->p_module )
module_Unneed( p_vout->p_sys->p_opencv, p_vout->p_sys->p_opencv->p_module );
vlc_object_detach( p_vout->p_sys->p_opencv );