Metadata: Limit Exif extraction to photos #338

Signed-off-by: Michael Mayer <michael@liquidbytes.net>

internal/photoprism/metadata.go

@@ -1,6 +1,7 @@
 package photoprism
 
 import (
+	"errors"
 	"path/filepath"
 
 	"github.com/photoprism/photoprism/internal/meta"
@@ -11,7 +12,13 @@ import (
 // MetaData returns exif meta data of a media file.
 func (m *MediaFile) MetaData() (result meta.Data) {
 	m.metaDataOnce.Do(func() {
-		err := m.metaData.Exif(m.FileName())
+		var err error
+
+		if m.IsPhoto() {
+			err = m.metaData.Exif(m.FileName())
+		} else {
+			err = errors.New("not a photo")
+		}
 
 		if jsonFile := fs.TypeJson.FindSub(m.FileName(), fs.HiddenPath, false); jsonFile == "" {
 			log.Debugf("mediafile: no json sidecar file found for %s", txt.Quote(filepath.Base(m.FileName())))