diff --git a/libavformat/isom.h b/libavformat/isom.h
index 32c4b3fd1da3cf3a8a7b722a95f3d270eadf324f..214af589a546bb63d60ec409d249ff9de4562648 100644
--- a/libavformat/isom.h
+++ b/libavformat/isom.h
@@ -143,6 +143,7 @@ typedef struct MOVContext {
     unsigned trex_count;
     int itunes_metadata;  ///< metadata are itunes style
     int chapter_track;
+    int64_t next_root_atom; ///< offset of the next root atom
 } MOVContext;
 
 int ff_mp4_read_descr_len(AVIOContext *pb);
diff --git a/libavformat/mov.c b/libavformat/mov.c
index 2242ba76364eec32b6f20c8b2d69c5da3290568f..a2b2da0a223a4c29800a48629d7658377c38e2de 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -350,8 +350,11 @@ static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom)
             if (err < 0)
                 return err;
             if (c->found_moov && c->found_mdat &&
-                (!pb->seekable || start_pos + a.size == avio_size(pb)))
+                (!pb->seekable || start_pos + a.size == avio_size(pb))) {
+                if (!pb->seekable)
+                    c->next_root_atom = start_pos + a.size;
                 return 0;
+            }
             left = a.size - avio_tell(pb) + start_pos;
             if (left > 0) /* skip garbage at atom end */
                 avio_skip(pb, left);
@@ -2667,8 +2670,11 @@ static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
     sample = mov_find_next_sample(s, &st);
     if (!sample) {
         mov->found_mdat = 0;
-        if (s->pb->seekable||
-            mov_read_default(mov, s->pb, (MOVAtom){ AV_RL32("root"), INT64_MAX }) < 0 ||
+        if (!mov->next_root_atom)
+            return AVERROR_EOF;
+        avio_seek(s->pb, mov->next_root_atom, SEEK_SET);
+        mov->next_root_atom = 0;
+        if (mov_read_default(mov, s->pb, (MOVAtom){ AV_RL32("root"), INT64_MAX }) < 0 ||
             s->pb->eof_reached)
             return AVERROR_EOF;
         av_dlog(s, "read fragments, offset 0x%"PRIx64"\n", avio_tell(s->pb));