diff --git a/internal/photoprism/convert_video_avc.go b/internal/photoprism/convert_video_avc.go
index dd5bc54b3..40aa159d9 100644
--- a/internal/photoprism/convert_video_avc.go
+++ b/internal/photoprism/convert_video_avc.go
@@ -46,7 +46,7 @@ func (w *Convert) ToAvc(f *MediaFile, encoder encode.Encoder, noMutex, force boo
 			if mp4Name, mp4Err := fs.FileName(f.FileName(), w.conf.SidecarPath(), w.conf.OriginalsPath(), fs.ExtMp4); mp4Err != nil {
 				return nil, fmt.Errorf("convert: %s in %s (remux)", mp4Err, clean.Log(f.RootRelName()))
 			} else if mp4Err = ffmpeg.RemuxFile(f.FileName(), mp4Name, encode.NewRemuxOptions(conf.FFmpegBin(), fs.VideoMp4, false)); mp4Err != nil {
-				return nil, fmt.Errorf("convert: %s in %s (remux)", err, clean.Log(f.RootRelName()))
+				return nil, fmt.Errorf("convert: %s in %s (remux)", mp4Err, clean.Log(f.RootRelName()))
 			} else if mp4File, fileErr := NewMediaFile(mp4Name); mp4File == nil || fileErr != nil {
 				log.Warnf("convert: %s could not be converted to mp4", logFileName)
 			} else if jsonErr := mp4File.CreateExifToolJson(w); jsonErr != nil {
diff --git a/internal/photoprism/mediafile_vision.go b/internal/photoprism/mediafile_vision.go
index 1ca330f14..4f487cdb4 100644
--- a/internal/photoprism/mediafile_vision.go
+++ b/internal/photoprism/mediafile_vision.go
@@ -38,7 +38,7 @@ func (m *MediaFile) GenerateCaption(captionSrc entity.Src) (caption *vision.Capt
 	fileName, fileErr := m.Thumbnail(Config().ThumbCachePath(), size.Name)
 
 	if fileErr != nil {
-		return caption, err
+		return caption, fileErr
 	}
 
 	// Get matching labels from computer vision model.
@@ -101,7 +101,7 @@ func (m *MediaFile) GenerateLabels(labelSrc entity.Src) (labels classify.Labels)
 	// Get thumbnail filenames for the selected sizes.
 	for _, s := range sizes {
 		if thumbnail, fileErr := m.Thumbnail(Config().ThumbCachePath(), s); fileErr != nil {
-			log.Debugf("index: %s in %s", err, clean.Log(m.RootRelName()))
+			log.Debugf("index: %s in %s", fileErr, clean.Log(m.RootRelName()))
 			continue
 		} else {
 			thumbnails = append(thumbnails, thumbnail)