fix mace duration

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@12209 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavformat/aiff.c

@@ -130,6 +130,10 @@ static unsigned int get_aiff_header(ByteIOContext *pb, AVCodecContext *codec,
             codec->block_align = 34*codec->channels;
             codec->frame_size = 64;
             break;
+        case CODEC_ID_MACE3:
+        case CODEC_ID_MACE6:
+            codec->frame_size = 6;
+            break;
         default:
             break;
         }