diff options
Diffstat (limited to 'libavfilter/avfiltergraph.c')
| -rw-r--r-- | libavfilter/avfiltergraph.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/libavfilter/avfiltergraph.c b/libavfilter/avfiltergraph.c index 4521f790f7..0a863e569c 100644 --- a/libavfilter/avfiltergraph.c +++ b/libavfilter/avfiltergraph.c @@ -213,11 +213,16 @@ static int query_formats(AVFilterGraph *graph, AVClass *log_ctx) /* couldn't merge format lists. auto-insert conversion filter */ switch (link->type) { case AVMEDIA_TYPE_VIDEO: + if (!(filter = avfilter_get_by_name("scale"))) { + av_log(log_ctx, AV_LOG_ERROR, "'scale' filter " + "not present, cannot convert pixel formats.\n"); + return AVERROR(EINVAL); + } + snprintf(inst_name, sizeof(inst_name), "auto-inserted scaler %d", scaler_count++); snprintf(scale_args, sizeof(scale_args), "0:0:%s", graph->scale_sws_opts); - if ((ret = avfilter_graph_create_filter(&convert, - avfilter_get_by_name("scale"), + if ((ret = avfilter_graph_create_filter(&convert, filter, inst_name, scale_args, NULL, graph)) < 0) return ret; |