Check validity and configure all the links and formats in the graph.
@param graphctx the filter graph @param log_ctx context used for logging @return >= 0 in case of success, a negative AVERROR code otherwise
See Implementation
Check validity and configure all the links and formats in the graph.
@param graphctx the filter graph @param log_ctx context used for logging @return >= 0 in case of success, a negative AVERROR code otherwise