---
libavcodec/aacdec.c | 4 +++-
1 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/libavcodec/aacdec.c b/libavcodec/aacdec.c
index 4d3f1ff..54507b4 100644
--- a/libavcodec/aacdec.c
+++ b/libavcodec/aacdec.c
@@ -2259,7 +2259,9 @@ static int aac_decode_frame(AVCodecContext *avctx, void
*data,
AV_PKT_DATA_NEW_EXTRADATA,
&new_extradata_size);
- if (new_extradata) {
+ if (new_extradata &&
+ (!avctx->extradata || new_extradata_size != avctx->extradata_size ||
+ memcmp(new_extradata, avctx->extradata, new_extradata_size))) {
av_free(avctx->extradata);
avctx->extradata = av_mallocz(new_extradata_size +
FF_INPUT_BUFFER_PADDING_SIZE);
--
1.7.3.1
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