From 676a395ab903cac623c5d6ddd0928c789e08a59e Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Sun, 19 Jan 2014 06:20:46 +0100
Subject: [PATCH] avcodec/aacdec: Dont fail if channels arent known yet

Fixes Ticket3312

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
---
 libavcodec/aacdec.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavcodec/aacdec.c b/libavcodec/aacdec.c
index 365df2117d..27f4b4c660 100644
--- a/libavcodec/aacdec.c
+++ b/libavcodec/aacdec.c
@@ -196,6 +196,9 @@ static int frame_configure_elements(AVCodecContext *avctx)
 
     /* get output buffer */
     av_frame_unref(ac->frame);
+    if (!avctx->channels)
+        return 1;
+
     ac->frame->nb_samples = 2048;
     if ((ret = ff_get_buffer(avctx, ac->frame, 0)) < 0)
         return ret;