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libavdevice/lavfi: check avfilter_graph_dump return value 

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Zhao Zhili 2019-11-21 15:08:18 +08:00 committed by Michael Niedermayer
parent 2205fb2810
commit 19956d01cc
1 changed files with 7 additions and 3 deletions
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10
libavdevice/lavfi.c
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@ -302,9 +302,13 @@ av_cold static int lavfi_read_header(AVFormatContext *avctx)
if (lavfi->dump_graph) {
char *dump = avfilter_graph_dump(lavfi->graph, lavfi->dump_graph);
fputs(dump, stderr);
fflush(stderr);
av_free(dump);
if (dump != NULL) {
fputs(dump, stderr);
fflush(stderr);
av_free(dump);
} else {
FAIL(AVERROR(ENOMEM));
}
}
/* fill each stream with the information in the corresponding sink */