From: Michael Niedermayer <[email protected]>

Fixes FFmpeg ticket 574.

Signed-off-by: Michael Niedermayer <[email protected]>
---
 libavcodec/aacdec.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/libavcodec/aacdec.c b/libavcodec/aacdec.c
index 7dfa070..1dc19d5 100644
--- a/libavcodec/aacdec.c
+++ b/libavcodec/aacdec.c
@@ -2319,8 +2319,8 @@ static int latm_decode_audio_specific_config(struct 
LATMContext *latmctx,
                                              GetBitContext *gb, int asclen)
 {
     AVCodecContext *avctx = latmctx->aac_ctx.avctx;
-    MPEG4AudioConfig m4ac;
     AACContext *ac= &latmctx->aac_ctx;
+    MPEG4AudioConfig m4ac=ac->m4ac;
     int  config_start_bit = get_bits_count(gb);
     int     bits_consumed, esize;
 
@@ -2336,7 +2336,8 @@ static int latm_decode_audio_specific_config(struct 
LATMContext *latmctx,
 
         if (bits_consumed < 0)
             return AVERROR_INVALIDDATA;
-        ac->m4ac= m4ac;
+        if(ac->m4ac.sample_rate != m4ac.sample_rate || m4ac.chan_config != 
ac->m4ac.chan_config)
+            ac->m4ac= m4ac;
 
         esize = (bits_consumed+7) / 8;
 
-- 
1.7.5.1

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