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-rw-r--r--libavformat/riff.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/libavformat/riff.c b/libavformat/riff.c
index d03015d484..43121afd7c 100644
--- a/libavformat/riff.c
+++ b/libavformat/riff.c
@@ -497,7 +497,8 @@ void ff_parse_specific_params(AVCodecContext *stream, int *au_rate, int *au_ssiz
if(stream->frame_size && stream->sample_rate){
*au_scale=stream->frame_size;
*au_rate= stream->sample_rate;
- }else if(stream->codec_type == CODEC_TYPE_VIDEO){
+ }else if(stream->codec_type == CODEC_TYPE_VIDEO ||
+ stream->codec_type == CODEC_TYPE_SUBTITLE){
*au_scale= stream->time_base.num;
*au_rate = stream->time_base.den;
}else{