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ffmpeg_filter: log more information on failure to init simple filter graph 

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
rogerdpack 2015-07-01 13:23:55 -06:00 committed by Michael Niedermayer
parent 03b2b40fd7
commit a1c03b9d58
1 changed files with 21 additions and 2 deletions
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23
ffmpeg_filter.c
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@ -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);
}