From 6fa97413578ecf7165850f1259009d73bed45983 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>
(cherry picked from commit 676a395ab903cac623c5d6ddd0928c789e08a59e)

Conflicts:
	libavcodec/aacdec.c
---
 libavcodec/aacdec.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavcodec/aacdec.c b/libavcodec/aacdec.c
index 3379f8b701..56f73ae5d7 100644
--- a/libavcodec/aacdec.c
+++ b/libavcodec/aacdec.c
@@ -190,6 +190,9 @@ static int frame_configure_elements(AVCodecContext *avctx)
         }
     }
 
+    if (!avctx->channels)
+        return 1;
+
     /* get output buffer */
     ac->frame.nb_samples = 2048;
     if ((ret = ff_get_buffer(avctx, &ac->frame)) < 0) {