fix(server): read ISO values above 65535 (#32183)

fix(server): read ISO values above 65535 (#32182)

(cherry picked from commit 6962412c0be35bf21c87d6a5935035adc7ae94e2)

Co-authored-by: bo0tzz <git@bo0tzz.me>

server/src/services/metadata.service.spec.ts

@@ -329,6 +329,17 @@ describe(MetadataService.name, () => {
       });
     });
 
+    it('should prefer the 32-bit sensitivity tags over a saturated ISO', async () => {
+      const asset = AssetFactory.create();
+      mocks.assetJob.getForMetadataExtraction.mockResolvedValue(getForMetadataExtraction(asset));
+      mockReadTags({ ISO: 65_535, RecommendedExposureIndex: 128_000 });
+
+      await sut.handleMetadataExtraction({ id: asset.id });
+      expect(mocks.asset.upsertExif).toHaveBeenCalledWith(
+        expect.objectContaining({ exif: expect.objectContaining({ iso: 128_000 }) }),
+      );
+    });
+
     it('should not delete latituide and longitude without reverse geocode', async () => {
       // regression test for issue 17511
       const asset = AssetFactory.from().exif().build();

server/src/services/metadata.service.ts

@@ -298,7 +298,7 @@ export class MetadataService extends BaseService {
         exifTags.Author ??
         null,
       fps: video?.frameRate ?? validate(Number(exifTags.VideoFrameRate!)),
-      iso: validate(exifTags.ISO) as number,
+      iso: validate(exifTags.RecommendedExposureIndex ?? exifTags.StandardOutputSensitivity ?? exifTags.ISO) as number,
       exposureTime: exifTags.ExposureTime ?? null,
       lensModel: getLensModel(exifTags),
       fNumber: validate(exifTags.FNumber),