diff --git a/libavformat/mov.c b/libavformat/mov.c
index 42062e6ba6..d08fd01054 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -6853,15 +6853,17 @@ static int mov_read_vexu_proj(MOVContext *c, AVIOContext *pb, MOVAtom atom)
     st = c->fc->streams[c->fc->nb_streams - 1];
     sc = st->priv_data;
 
-    if (atom.size != 16) {
+    if (atom.size < 16) {
         av_log(c->fc, AV_LOG_ERROR, "Invalid size for proj box: %"PRIu64"\n", atom.size);
         return AVERROR_INVALIDDATA;
     }
 
     size = avio_rb32(pb);
-    if (size != 16) {
+    if (size < 16) {
         av_log(c->fc, AV_LOG_ERROR, "Invalid size for prji box: %d\n", size);
         return AVERROR_INVALIDDATA;
+    } else if (size > 16) {
+        av_log(c->fc, AV_LOG_WARNING, "Box has more bytes (%d) than prji box required (16) \n", size);
     }
 
     tag = avio_rl32(pb);