In mov demuxer, do not override aspect ratio in tkhd by pasp like quicktime, fix issue #1539

Originally committed as revision 25080 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/mov.c

@@ -584,12 +584,13 @@ static int mov_read_pasp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
         return 0;
     st = c->fc->streams[c->fc->nb_streams-1];
 
-    if (den != 0) {
-        if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
-            (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num))
-            av_log(c->fc, AV_LOG_WARNING,
-                   "sample aspect ratio already set to %d:%d, overriding by 'pasp' atom\n",
-                   st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
+    if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
+        (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num)) {
+        av_log(c->fc, AV_LOG_WARNING,
+               "sample aspect ratio already set to %d:%d, ignoring 'pasp' atom (%d:%d)\n",
+               st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
+               num, den);
+    } else if (den != 0) {
         st->sample_aspect_ratio.num = num;
         st->sample_aspect_ratio.den = den;
     }