diff options
| -rw-r--r-- | ffmpeg_filter.c | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/ffmpeg_filter.c b/ffmpeg_filter.c index 0be49bea87..1ae8207eb0 100644 --- a/ffmpeg_filter.c +++ b/ffmpeg_filter.c @@ -947,8 +947,27 @@ int configure_filtergraph(FilterGraph *fg) return ret; if (simple && (!inputs || inputs->next || !outputs || outputs->next)) { - av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' does not have " - "exactly one input and output.\n", graph_desc); + 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); } |