From 93fc5a9ff66637475025433c91876b80422f7bb4 Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Tue, 6 Dec 2011 07:51:54 +0100
Subject: [PATCH] lavf: force threads to 1 in avformat_find_stream_info()

Fixes avformat_find_stream_info() on streams with number of frames <
thread count.
---
 libavformat/utils.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libavformat/utils.c b/libavformat/utils.c
index f42428563d..bc5b7e02da 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -2291,6 +2291,11 @@ int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
         assert(!st->codec->codec);
         codec = avcodec_find_decoder(st->codec->codec_id);
 
+        /* this function doesn't flush the decoders, so force thread count
+         * to 1 to fix behavior when thread count > number of frames in the file */
+        if (options)
+            av_dict_set(&options[i], "threads", "1", 0);
+
         /* Ensure that subtitle_header is properly set. */
         if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
             && codec && !st->codec->codec)
-- 
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