threads: change the default for threads back to 1

Using threaded decoding by default breaks backward compatibility if
AVHWAccel is used or if an appliction sets threadunsafe callbacks.
Avconv and avplay still use -threads auto if not specified.

1 files changed, 2 insertions, 0 deletions

diff --git a/avplay.c b/avplay.c
index 85e03770e5..432afc11b3 100644
--- a/avplay.c
+++ b/avplay.c
@@ -2194,6 +2194,8 @@ static int stream_component_open(VideoState *is, int stream_index)
     if (lowres) avctx->flags  |= CODEC_FLAG_EMU_EDGE;
     if (fast)   avctx->flags2 |= CODEC_FLAG2_FAST;
 
+    if (!av_dict_get(opts, "threads", NULL, 0))
+        av_dict_set(&opts, "threads", "auto", 0);
     if (!codec ||
         avcodec_open2(avctx, codec, &opts) < 0)
         return -1;