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-rw-r--r--libavformat/isom.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/libavformat/isom.c b/libavformat/isom.c
index b0eef375c6..7b9f91b58a 100644
--- a/libavformat/isom.c
+++ b/libavformat/isom.c
@@ -436,7 +436,7 @@ int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, AVIOContext
if (st->codec->codec_id == CODEC_ID_AAC) {
MPEG4AudioConfig cfg;
avpriv_mpeg4audio_get_config(&cfg, st->codec->extradata,
- st->codec->extradata_size);
+ st->codec->extradata_size * 8, 1);
st->codec->channels = cfg.channels;
if (cfg.object_type == 29 && cfg.sampling_index < 3) // old mp3on4
st->codec->sample_rate = avpriv_mpa_freq_tab[cfg.sampling_index];