@param graph the filter graph where to link the parsed graph context
@param filters string to be parsed
@param inputs pointer to a linked list to the inputs of the graph, may be NULL.
If non-NULL, *inputs is updated to contain the list of open inputs
after the parsing, should be freed with avfilter_inout_free().
@param outputs pointer to a linked list to the outputs of the graph, may be NULL.
If non-NULL, *outputs is updated to contain the list of open outputs
after the parsing, should be freed with avfilter_inout_free().
@return non negative on success, a negative AVERROR code on error
Add a graph described by a string to a graph.
@param graph the filter graph where to link the parsed graph context @param filters string to be parsed @param inputs pointer to a linked list to the inputs of the graph, may be NULL. If non-NULL, *inputs is updated to contain the list of open inputs after the parsing, should be freed with avfilter_inout_free(). @param outputs pointer to a linked list to the outputs of the graph, may be NULL. If non-NULL, *outputs is updated to contain the list of open outputs after the parsing, should be freed with avfilter_inout_free(). @return non negative on success, a negative AVERROR code on error