sample_rate and channels in aac audio patch by (Luca Abeni <lucabe72 at email dot it>)

Originally committed as revision 3198 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/faad.c

@@ -116,6 +116,9 @@ static int faac_init_mp4(AVCodecContext *avctx)
     if (r < 0)
 	av_log(avctx, AV_LOG_ERROR, "faacDecInit2 failed r:%d   sr:%ld  ch:%ld  s:%d\n",
 		r, samplerate, (long)channels, avctx->extradata_size);
+    avctx->sample_rate = samplerate;
+    avctx->channels = channels;
+
     return r;
 }