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-rw-r--r--libavformat/utils.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/libavformat/utils.c b/libavformat/utils.c
index ee6a71e439..c4ebf2087b 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -1842,7 +1842,7 @@ static int has_codec_parameters(AVCodecContext *enc)
int val;
switch(enc->codec_type) {
case CODEC_TYPE_AUDIO:
- val = enc->sample_rate && enc->channels;
+ val = enc->sample_rate && enc->channels && enc->sample_fmt != SAMPLE_FMT_NONE;
if(!enc->frame_size &&
(enc->codec_id == CODEC_ID_VORBIS ||
enc->codec_id == CODEC_ID_AAC))