int configure_filtergraph(FilterGraph *fg) { AVFilterInOut *inputs, *outputs, *cur; int ret, i, simple = !fg->graph_desc; const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter : fg->graph_desc; avfilter_graph_free(&fg->graph); if (!(fg->graph = avfilter_graph_alloc())) return AVERROR(ENOMEM); if (simple) { OutputStream *ost = fg->outputs[0]->ost; char args[512]; AVDictionaryEntry *e = NULL; args[0] = 0; while ((e = av_dict_get(ost->sws_dict, "", e, AV_DICT_IGNORE_SUFFIX))) { av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value); } if (strlen(args)) args[strlen(args)-1] = 0; fg->graph->scale_sws_opts = av_strdup(args); args[0] = 0; while ((e = av_dict_get(ost->swr_opts, "", e, AV_DICT_IGNORE_SUFFIX))) { av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value); } if (strlen(args)) args[strlen(args)-1] = 0; av_opt_set(fg->graph, "aresample_swr_opts", args, 0); args[0] = '\0'; while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e, AV_DICT_IGNORE_SUFFIX))) { av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value); } if (strlen(args)) args[strlen(args) - 1] = '\0'; fg->graph->resample_lavr_opts = av_strdup(args); e = av_dict_get(ost->encoder_opts, "threads", NULL, 0); if (e) av_opt_set(fg->graph, "threads", e->value, 0); } if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0) return ret; if (simple && (!inputs || inputs->next || !outputs || outputs->next)) { const char *num_inputs; const char *num_outputs; if (!outputs) { num_outputs = "0"; } else if (outputs->next) { num_outputs = ">1"; } else { num_outputs = "1"; } if (!inputs) { num_inputs = "0"; } else if (inputs->next) { num_inputs = ">1"; } else { num_inputs = "1"; } av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' was expected " "to have exactly 1 input and 1 output." " However, it had %s input(s) and %s output(s)." " Please adjust, or use a complex filtergraph (-filter_complex) instead.\n", graph_desc, num_inputs, num_outputs); return AVERROR(EINVAL); } for (cur = inputs, i = 0; cur; cur = cur->next, i++) if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0) { avfilter_inout_free(&inputs); avfilter_inout_free(&outputs); return ret; } avfilter_inout_free(&inputs); for (cur = outputs, i = 0; cur; cur = cur->next, i++) configure_output_filter(fg, fg->outputs[i], cur); avfilter_inout_free(&outputs); if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0) return ret; fg->reconfiguration = 1; for (i = 0; i < fg->nb_outputs; i++) { OutputStream *ost = fg->outputs[i]->ost; if (!ost->enc) { /* identical to the same check in ffmpeg.c, needed because complex filter graphs are initialized earlier */ av_log(NULL, AV_LOG_ERROR, "Encoder (codec %s) not found for output stream #%d:%d\n", avcodec_get_name(ost->st->codec->codec_id), ost->file_index, ost->index); return AVERROR(EINVAL); } if (ost && ost->enc->type == AVMEDIA_TYPE_AUDIO && !(ost->enc->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE)) av_buffersink_set_frame_size(ost->filter->filter, ost->enc_ctx->frame_size); } return 0; }