lavf/ape: Fix stream duration calculation

Fixes ticket #1662
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavformat/ape.c

@@ -38,8 +38,6 @@
 #define MAC_FORMAT_FLAG_HAS_SEEK_ELEMENTS    16 // has the number of seek elements after the peak level
 #define MAC_FORMAT_FLAG_CREATE_WAV_HEADER    32 // create the wave header on decompression (not stored)
 
-#define MAC_SUBFRAME_SIZE 4608
-
 #define APE_EXTRADATA_SIZE 6
 
 typedef struct {
@@ -335,8 +333,8 @@ static int ape_read_header(AVFormatContext * s)
 
     st->nb_frames = ape->totalframes;
     st->start_time = 0;
-    st->duration  = total_blocks / MAC_SUBFRAME_SIZE;
-    avpriv_set_pts_info(st, 64, MAC_SUBFRAME_SIZE, ape->samplerate);
+    st->duration  = total_blocks;
+    avpriv_set_pts_info(st, 64, 1, ape->samplerate);
 
     st->codec->extradata = av_malloc(APE_EXTRADATA_SIZE);
     st->codec->extradata_size = APE_EXTRADATA_SIZE;
@@ -348,7 +346,7 @@ static int ape_read_header(AVFormatContext * s)
     for (i = 0; i < ape->totalframes; i++) {
         ape->frames[i].pts = pts;
         av_add_index_entry(st, ape->frames[i].pos, ape->frames[i].pts, 0, 0, AVINDEX_KEYFRAME);
-        pts += ape->blocksperframe / MAC_SUBFRAME_SIZE;
+        pts += ape->blocksperframe;
     }
 
     /* try to read APE tags */