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-rw-r--r--libavcodec/wmadec.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/libavcodec/wmadec.c b/libavcodec/wmadec.c
index fa20bea1e0..3601e47af1 100644
--- a/libavcodec/wmadec.c
+++ b/libavcodec/wmadec.c
@@ -102,6 +102,13 @@ static int wma_decode_init(AVCodecContext * avctx)
s->use_bit_reservoir = flags2 & 0x0002;
s->use_variable_block_len = flags2 & 0x0004;
+ if(avctx->codec->id == CODEC_ID_WMAV2 && avctx->extradata_size >= 8){
+ if(!AV_RL16(extradata+6) && s->use_variable_block_len){
+ av_log(avctx, AV_LOG_WARNING, "Disabling use_variable_block_len, if this fails contact the ffmpeg developers and send us the file\n");
+ s->use_variable_block_len= 0; // this fixes issue1503
+ }
+ }
+
if(ff_wma_init(avctx, flags2)<0)
return -1;