int avfilter_graph_create_filter(AVFilterContext **filt_ctx, AVFilter *filt, const char *name, const char *args, void *opaque, AVFilterGraph *graph_ctx) { int ret; *filt_ctx = avfilter_graph_alloc_filter(graph_ctx, filt, name); if (!*filt_ctx) return AVERROR(ENOMEM); ret = avfilter_init_filter(*filt_ctx, args, opaque); if (ret < 0) goto fail; return 0; fail: if (*filt_ctx) avfilter_free(*filt_ctx); *filt_ctx = NULL; return ret; }