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-rw-r--r--libavformat/astenc.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/libavformat/astenc.c b/libavformat/astenc.c
index 2c4afb7afb..6121a0153c 100644
--- a/libavformat/astenc.c
+++ b/libavformat/astenc.c
@@ -51,7 +51,7 @@ static int ast_write_header(AVFormatContext *s)
AVCodecContext *enc;
unsigned int codec_tag;
- if (s->nb_streams = 1) {
+ if (s->nb_streams == 1) {
enc = s->streams[0]->codec;
} else {
av_log(s, AV_LOG_ERROR, "only one stream is supported\n");