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ffmpeg: check for unconnected outputs

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Fixes e.g.:

ffmpeg -f lavfi -i testsrc -f lavfi -i testsrc -filter_complex "[0:v][1:v]psnr[out]" -f null none

Fixes ticket #6323.

(cherry picked from commit 974ee16d6a)
This commit is contained in:
wm4
2017-05-05 00:15:15 +02:00
committed by Marton Balint
parent 329176adc5
commit 059db22040
3 changed files with 18 additions and 0 deletions
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15
ffmpeg_filter.c
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@@ -678,6 +678,21 @@ int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOu
}
}
void check_filter_outputs(void)
{
int i;
for (i = 0; i < nb_filtergraphs; i++) {
int n;
for (n = 0; n < filtergraphs[i]->nb_outputs; n++) {
OutputFilter *output = filtergraphs[i]->outputs[n];
if (!output->ost) {
av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", output->name);
exit_program(1);
}
}
}
}
static int sub2video_prepare(InputStream *ist, InputFilter *ifilter)
{
AVFormatContext *avf = input_files[ist->file_index]->ctx;