A function pointer passed to the @ref AVFilterGraph.execute callback to be
executed multiple times, possibly in parallel.
@param ctx the filter context the job belongs to
@param arg an opaque parameter passed through from @ref
AVFilterGraph.execute
@param jobnr the index of the job being executed
@param nb_jobs the total number of jobs
A function pointer passed to the @ref AVFilterGraph.execute callback to be executed multiple times, possibly in parallel.
@param ctx the filter context the job belongs to @param arg an opaque parameter passed through from @ref AVFilterGraph.execute @param jobnr the index of the job being executed @param nb_jobs the total number of jobs
@return 0 on success, a negative AVERROR on error