void FilterGraph::pushFilter(Filter& filter)
{
AVFilterContext* context = NULL;
const int err = avfilter_graph_create_filter(&context, &filter.getAVFilter(), filter.getInstanceName().c_str(),
filter.getOptions().c_str(), NULL, _graph);
filter.setAVFilterContext(context);
if(err < 0)
{
std::string msg("Cannot add filter ");
msg += filter.getName();
msg += " (instance=";
msg += filter.getInstanceName();
msg += ") to the graph: ";
msg += getDescriptionFromErrorCode(err);
throw std::runtime_error(msg);
}
}
