From d16bc6f6ea84f842473453bb1032a87b13be245c Mon Sep 17 00:00:00 2001
From: Alberto Griggio <agriggio@users.noreply.github.com>
Date: Sat, 12 Dec 2020 17:10:45 +0100
Subject: [PATCH] metadata: do not copy Exif tags with 0 count

Tentative fix for #147

(cherry picked from commit 12f699df10c1c0854c0e882db151560a1f4f3a26)
---
 rtengine/metadata.cc | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/rtengine/metadata.cc b/rtengine/metadata.cc
index 85fcf79ff..f5f2d972c 100644
--- a/rtengine/metadata.cc
+++ b/rtengine/metadata.cc
@@ -230,7 +230,12 @@ void Exiv2Metadata::saveToImage(const Glib::ustring &path, bool preserve_all_tag
         if (!preserve_all_tags) {
             remove_unwanted(srcexif);
         }
-        dst->setExifData(srcexif);
+        //dst->setExifData(srcexif);
+        for (auto &tag : srcexif) {
+            if (tag.count() > 0) {
+                dst->exifData()[tag.key()] = tag;
+            }
+        }
     } else {
         dst->setExifData(exif_data_);
         dst->setIptcData(iptc_data_);