Nothing useful can be done with them currently.
---
fftools/ffmpeg_filter.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/fftools/ffmpeg_filter.c b/fftools/ffmpeg_filter.c
index 4f7565e44e..54c7ed1f5c 100644
--- a/fftools/ffmpeg_filter.c
+++ b/fftools/ffmpeg_filter.c
@@ -845,6 +845,12 @@ FilterGraph *fg_create(char *graph_desc)
ofilter->name = describe_filter_link(fg, cur, 0);
}
+ if (!fg->nb_outputs) {
+ av_log(fg, AV_LOG_FATAL, "A filtergraph has zero outputs, this is not
supported\n");
+ ret = AVERROR(ENOSYS);
+ goto fail;
+ }
+
fail:
avfilter_inout_free(&inputs);
avfilter_inout_free(&outputs);
--
2.40.1
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