Hallo friends,
I'm confused over how to use FileStorage in order to write a sequence of mappings to a file.
Here's an example:
vector<pair<uint, Point>> vec; // holds results of video analysis
// append pairs to vec...
FileStorage fs(file, FileStorage::WRITE);
fs << "Positions" << "[";
for (Result::iterator i = vec.begin(); i != vec.end(); ++i)
{
fs << "{"
<< "Frame" << (int)i->first
<< "X" << i->second.x
<< "Y" << i->second.y
<< "}";
}
fs << "]";
When I'm running the above code I trigger the following CV_Error (persistence.hpp:1064):
if( fs.state == FileStorage::NAME_EXPECTED + FileStorage::INSIDE_MAP )
CV_Error( Error::StsError, "No element name has been given" );
While trying to write the first element of the mapping.
Of course I've checked the docs (see: http://docs.opencv.org/modules/core/doc/xml_yaml_persistence.html) but was suprised to see, that they basically do the exact same thing there.
Have they changed the syntax in OpenCV3.0 or am I overlooking something here?
I've already recompiled the current master branch (faa6684) prior to cleaning the build directory.
I'm running a Win 7 x64 with VS2012 as a compiler.
Many thanks,
Viktor