diff --git a/app/lib/l10n/app_en.arb b/app/lib/l10n/app_en.arb
index b73ad4ee..fb204832 100644
--- a/app/lib/l10n/app_en.arb
+++ b/app/lib/l10n/app_en.arb
@@ -1530,6 +1530,7 @@
 	"@albumAddMapTooltip": {
 		"description": "Add a map that display between photos to an album"
 	},
+	"fileNotFound": "File not found",
 
 	"errorUnauthenticated": "Unauthenticated access. Please sign-in again if the problem continues",
 	"@errorUnauthenticated": {
diff --git a/app/lib/l10n/untranslated-messages.txt b/app/lib/l10n/untranslated-messages.txt
index 09465826..d8e1d435 100644
--- a/app/lib/l10n/untranslated-messages.txt
+++ b/app/lib/l10n/untranslated-messages.txt
@@ -272,6 +272,7 @@
     "customizeButtonsUnsupportedWarning",
     "placePickerTitle",
     "albumAddMapTooltip",
+    "fileNotFound",
     "errorUnauthenticated",
     "errorDisconnected",
     "errorLocked",
@@ -295,7 +296,8 @@
     "customizeCollectionsNavBarDescription",
     "customizeButtonsUnsupportedWarning",
     "placePickerTitle",
-    "albumAddMapTooltip"
+    "albumAddMapTooltip",
+    "fileNotFound"
   ],
 
   "de": [
@@ -311,7 +313,8 @@
     "customizeCollectionsNavBarDescription",
     "customizeButtonsUnsupportedWarning",
     "placePickerTitle",
-    "albumAddMapTooltip"
+    "albumAddMapTooltip",
+    "fileNotFound"
   ],
 
   "el": [
@@ -472,7 +475,8 @@
     "customizeCollectionsNavBarDescription",
     "customizeButtonsUnsupportedWarning",
     "placePickerTitle",
-    "albumAddMapTooltip"
+    "albumAddMapTooltip",
+    "fileNotFound"
   ],
 
   "es": [
@@ -488,7 +492,8 @@
     "customizeCollectionsNavBarDescription",
     "customizeButtonsUnsupportedWarning",
     "placePickerTitle",
-    "albumAddMapTooltip"
+    "albumAddMapTooltip",
+    "fileNotFound"
   ],
 
   "fi": [
@@ -540,7 +545,8 @@
     "customizeCollectionsNavBarDescription",
     "customizeButtonsUnsupportedWarning",
     "placePickerTitle",
-    "albumAddMapTooltip"
+    "albumAddMapTooltip",
+    "fileNotFound"
   ],
 
   "fr": [
@@ -592,7 +598,8 @@
     "customizeCollectionsNavBarDescription",
     "customizeButtonsUnsupportedWarning",
     "placePickerTitle",
-    "albumAddMapTooltip"
+    "albumAddMapTooltip",
+    "fileNotFound"
   ],
 
   "it": [
@@ -649,7 +656,8 @@
     "customizeCollectionsNavBarDescription",
     "customizeButtonsUnsupportedWarning",
     "placePickerTitle",
-    "albumAddMapTooltip"
+    "albumAddMapTooltip",
+    "fileNotFound"
   ],
 
   "nl": [
@@ -1041,6 +1049,7 @@
     "customizeButtonsUnsupportedWarning",
     "placePickerTitle",
     "albumAddMapTooltip",
+    "fileNotFound",
     "errorUnauthenticated",
     "errorDisconnected",
     "errorLocked",
@@ -1104,7 +1113,8 @@
     "customizeCollectionsNavBarDescription",
     "customizeButtonsUnsupportedWarning",
     "placePickerTitle",
-    "albumAddMapTooltip"
+    "albumAddMapTooltip",
+    "fileNotFound"
   ],
 
   "pt": [
@@ -1176,7 +1186,8 @@
     "customizeCollectionsNavBarDescription",
     "customizeButtonsUnsupportedWarning",
     "placePickerTitle",
-    "albumAddMapTooltip"
+    "albumAddMapTooltip",
+    "fileNotFound"
   ],
 
   "ru": [
@@ -1228,7 +1239,8 @@
     "customizeCollectionsNavBarDescription",
     "customizeButtonsUnsupportedWarning",
     "placePickerTitle",
-    "albumAddMapTooltip"
+    "albumAddMapTooltip",
+    "fileNotFound"
   ],
 
   "tr": [
@@ -1244,7 +1256,8 @@
     "customizeCollectionsNavBarDescription",
     "customizeButtonsUnsupportedWarning",
     "placePickerTitle",
-    "albumAddMapTooltip"
+    "albumAddMapTooltip",
+    "fileNotFound"
   ],
 
   "zh": [
@@ -1327,7 +1340,8 @@
     "customizeCollectionsNavBarDescription",
     "customizeButtonsUnsupportedWarning",
     "placePickerTitle",
-    "albumAddMapTooltip"
+    "albumAddMapTooltip",
+    "fileNotFound"
   ],
 
   "zh_Hant": [
@@ -1504,6 +1518,7 @@
     "customizeCollectionsNavBarDescription",
     "customizeButtonsUnsupportedWarning",
     "placePickerTitle",
-    "albumAddMapTooltip"
+    "albumAddMapTooltip",
+    "fileNotFound"
   ]
 }
diff --git a/app/lib/widget/slideshow_viewer.dart b/app/lib/widget/slideshow_viewer.dart
index 65d28b6e..e5067061 100644
--- a/app/lib/widget/slideshow_viewer.dart
+++ b/app/lib/widget/slideshow_viewer.dart
@@ -7,8 +7,10 @@ import 'package:flutter/services.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:logging/logging.dart';
 import 'package:nc_photos/account.dart';
+import 'package:nc_photos/app_localizations.dart';
 import 'package:nc_photos/bloc_util.dart';
 import 'package:nc_photos/controller/account_controller.dart';
+import 'package:nc_photos/controller/files_controller.dart';
 import 'package:nc_photos/entity/file_descriptor.dart';
 import 'package:nc_photos/entity/file_util.dart' as file_util;
 import 'package:nc_photos/k.dart' as k;
@@ -23,6 +25,7 @@ import 'package:nc_photos/widget/video_viewer.dart';
 import 'package:nc_photos/widget/viewer_mixin.dart';
 import 'package:nc_photos/widget/wakelock_util.dart';
 import 'package:np_codegen/np_codegen.dart';
+import 'package:np_common/object_util.dart';
 import 'package:np_ui/np_ui.dart';
 import 'package:to_string/to_string.dart';
 
@@ -35,13 +38,13 @@ part 'slideshow_viewer/view.dart';
 class SlideshowViewerArguments {
   const SlideshowViewerArguments(
     this.account,
-    this.files,
+    this.fileIds,
     this.startIndex,
     this.config,
   );
 
   final Account account;
-  final List<FileDescriptor> files;
+  final List<int> fileIds;
   final int startIndex;
   final SlideshowConfig config;
 }
@@ -59,7 +62,7 @@ class SlideshowViewer extends StatelessWidget {
   const SlideshowViewer({
     super.key,
     required this.account,
-    required this.files,
+    required this.fileIds,
     required this.startIndex,
     required this.config,
   });
@@ -68,7 +71,7 @@ class SlideshowViewer extends StatelessWidget {
       : this(
           key: key,
           account: args.account,
-          files: args.files,
+          fileIds: args.fileIds,
           startIndex: args.startIndex,
           config: args.config,
         );
@@ -77,8 +80,9 @@ class SlideshowViewer extends StatelessWidget {
   Widget build(BuildContext context) {
     return BlocProvider(
       create: (context) => _Bloc(
+        filesController: context.read<AccountController>().filesController,
         account: context.read<AccountController>().account,
-        files: files,
+        fileIds: fileIds,
         startIndex: startIndex,
         config: config,
       )..add(const _Init()),
@@ -87,7 +91,7 @@ class SlideshowViewer extends StatelessWidget {
   }
 
   final Account account;
-  final List<FileDescriptor> files;
+  final List<int> fileIds;
   final int startIndex;
   final SlideshowConfig config;
 }
@@ -145,7 +149,11 @@ class _WrappedSlideshowViewerState extends State<_WrappedSlideshowViewer>
               onPopInvoked: (_) {
                 context.addEvent(const _RequestExit());
               },
-              child: const _Body(),
+              child: _BlocSelector<bool>(
+                selector: (state) => state.hasInit,
+                builder: (context, hasInit) =>
+                    hasInit ? const _Body() : const _InitBody(),
+              ),
             ),
           ),
         ),
diff --git a/app/lib/widget/slideshow_viewer.g.dart b/app/lib/widget/slideshow_viewer.g.dart
index 88735d34..51d8eccd 100644
--- a/app/lib/widget/slideshow_viewer.g.dart
+++ b/app/lib/widget/slideshow_viewer.g.dart
@@ -18,6 +18,7 @@ abstract class $_StateCopyWithWorker {
       int? page,
       int? nextPage,
       bool? shouldAnimateNextPage,
+      List<FileDescriptor?>? files,
       FileDescriptor? currentFile,
       bool? isShowUi,
       bool? isPlay,
@@ -38,7 +39,8 @@ class _$_StateCopyWithWorkerImpl implements $_StateCopyWithWorker {
       dynamic page,
       dynamic nextPage,
       dynamic shouldAnimateNextPage,
-      dynamic currentFile,
+      dynamic files,
+      dynamic currentFile = copyWithNull,
       dynamic isShowUi,
       dynamic isPlay,
       dynamic isVideoCompleted,
@@ -53,7 +55,10 @@ class _$_StateCopyWithWorkerImpl implements $_StateCopyWithWorker {
         nextPage: nextPage as int? ?? that.nextPage,
         shouldAnimateNextPage:
             shouldAnimateNextPage as bool? ?? that.shouldAnimateNextPage,
-        currentFile: currentFile as FileDescriptor? ?? that.currentFile,
+        files: files as List<FileDescriptor?>? ?? that.files,
+        currentFile: currentFile == copyWithNull
+            ? that.currentFile
+            : currentFile as FileDescriptor?,
         isShowUi: isShowUi as bool? ?? that.isShowUi,
         isPlay: isPlay as bool? ?? that.isPlay,
         isVideoCompleted: isVideoCompleted as bool? ?? that.isVideoCompleted,
@@ -104,7 +109,7 @@ extension _$_PageViewNpLog on _PageView {
 extension _$_StateToString on _State {
   String _$toString() {
     // ignore: unnecessary_string_interpolations
-    return "_State {hasInit: $hasInit, page: $page, nextPage: $nextPage, shouldAnimateNextPage: $shouldAnimateNextPage, currentFile: ${currentFile.fdPath}, isShowUi: $isShowUi, isPlay: $isPlay, isVideoCompleted: $isVideoCompleted, hasPrev: $hasPrev, hasNext: $hasNext, isShowTimeline: $isShowTimeline, hasShownTimeline: $hasShownTimeline, hasRequestExit: $hasRequestExit}";
+    return "_State {hasInit: $hasInit, page: $page, nextPage: $nextPage, shouldAnimateNextPage: $shouldAnimateNextPage, files: [length: ${files.length}], currentFile: ${currentFile == null ? null : "${currentFile!.fdPath}"}, isShowUi: $isShowUi, isPlay: $isPlay, isVideoCompleted: $isVideoCompleted, hasPrev: $hasPrev, hasNext: $hasNext, isShowTimeline: $isShowTimeline, hasShownTimeline: $hasShownTimeline, hasRequestExit: $hasRequestExit}";
   }
 }
 
@@ -115,6 +120,13 @@ extension _$_InitToString on _Init {
   }
 }
 
+extension _$_SetFilesToString on _SetFiles {
+  String _$toString() {
+    // ignore: unnecessary_string_interpolations
+    return "_SetFiles {dataMap: {length: ${dataMap.length}}}";
+  }
+}
+
 extension _$_ToggleShowUiToString on _ToggleShowUi {
   String _$toString() {
     // ignore: unnecessary_string_interpolations
diff --git a/app/lib/widget/slideshow_viewer/bloc.dart b/app/lib/widget/slideshow_viewer/bloc.dart
index d9fc12f0..67603833 100644
--- a/app/lib/widget/slideshow_viewer/bloc.dart
+++ b/app/lib/widget/slideshow_viewer/bloc.dart
@@ -3,14 +3,14 @@ part of '../slideshow_viewer.dart';
 @npLog
 class _Bloc extends Bloc<_Event, _State> with BlocLogger {
   _Bloc({
+    required this.filesController,
     required this.account,
-    required this.files,
+    required this.fileIds,
     required this.startIndex,
     required this.config,
-  }) : super(_State.init(
-          initialFile: files[startIndex],
-        )) {
+  }) : super(_State.init()) {
     on<_Init>(_onInit);
+    on<_SetFiles>(_onSetFiles);
     on<_ToggleShowUi>(_onToggleShowUi);
     on<_PreloadSidePages>(_onPreloadSidePages);
     on<_VideoCompleted>(_onVideoCompleted);
@@ -23,6 +23,10 @@ class _Bloc extends Bloc<_Event, _State> with BlocLogger {
     on<_ToggleTimeline>(_onToggleTimeline);
     on<_RequestPage>(_onRequestPage);
     on<_RequestExit>(_onRequestExit);
+
+    _subscriptions.add(filesController.stream.listen((event) {
+      add(_SetFiles(event.dataMap));
+    }));
   }
 
   @override
@@ -40,24 +44,27 @@ class _Bloc extends Bloc<_Event, _State> with BlocLogger {
   /// Convert the page index to the corresponding item index
   int convertPageToFileIndex(int pageIndex) {
     if (config.isShuffle) {
-      final i = pageIndex ~/ files.length;
+      final i = pageIndex ~/ fileIds.length;
       if (!_shuffledIndex.containsKey(i)) {
-        final index = [for (var i = 0; i < files.length; ++i) i];
+        final index = [for (var i = 0; i < fileIds.length; ++i) i];
         _shuffledIndex[i] = index..shuffle();
       }
-      return _shuffledIndex[i]![pageIndex % files.length];
+      return _shuffledIndex[i]![pageIndex % fileIds.length];
     } else {
-      return _shuffledIndex[0]![pageIndex % files.length];
+      return _shuffledIndex[0]![pageIndex % fileIds.length];
     }
   }
 
-  FileDescriptor getFileByPageIndex(int pageIndex) =>
-      files[convertPageToFileIndex(pageIndex)];
+  FileDescriptor? getFileByPageIndex(int pageIndex) =>
+      state.files[convertPageToFileIndex(pageIndex)];
 
-  void _onInit(_Init ev, Emitter<_State> emit) {
+  Future<void> _onInit(_Init ev, Emitter<_State> emit) async {
     _log.info(ev);
+    // needed for now because some pages (e.g., search) haven't yet migrated
+    await filesController.queryByFileId(fileIds);
+
     final parsedConfig = _parseConfig(
-      files: files,
+      fileIds: fileIds,
       startIndex: startIndex,
       config: config,
     );
@@ -71,7 +78,16 @@ class _Bloc extends Bloc<_Event, _State> with BlocLogger {
       hasPrev: initialPage > 0,
       hasNext: pageCount == null || initialPage < (pageCount! - 1),
     ));
-    _prepareNextPage();
+    unawaited(_prepareNextPage());
+  }
+
+  void _onSetFiles(_SetFiles ev, Emitter<_State> emit) {
+    _log.info(ev);
+    final files = fileIds.map((e) => ev.dataMap[e]).toList();
+    emit(state.copyWith(
+      files: files,
+      currentFile: files[convertPageToFileIndex(state.page)],
+    ));
   }
 
   void _onToggleShowUi(_ToggleShowUi ev, Emitter<_State> emit) {
@@ -96,16 +112,14 @@ class _Bloc extends Bloc<_Event, _State> with BlocLogger {
     }
     _log.info("[_onPreloadSidePages] Pre-loading nearby images");
     if (ev.center > 0) {
-      final fileIndex = convertPageToFileIndex(ev.center - 1);
-      final prevFile = files[fileIndex];
-      if (file_util.isSupportedImageFormat(prevFile)) {
+      final prevFile = getFileByPageIndex(ev.center - 1);
+      if (prevFile != null && file_util.isSupportedImageFormat(prevFile)) {
         RemoteImageViewer.preloadImage(account, prevFile);
       }
     }
     if (pageCount == null || ev.center + 1 < pageCount!) {
-      final fileIndex = convertPageToFileIndex(ev.center + 1);
-      final nextFile = files[fileIndex];
-      if (file_util.isSupportedImageFormat(nextFile)) {
+      final nextFile = getFileByPageIndex(ev.center + 1);
+      if (nextFile != null && file_util.isSupportedImageFormat(nextFile)) {
         RemoteImageViewer.preloadImage(account, nextFile);
       }
     }
@@ -128,7 +142,7 @@ class _Bloc extends Bloc<_Event, _State> with BlocLogger {
 
   void _onSetPlay(_SetPlay ev, Emitter<_State> emit) {
     _log.info(ev);
-    if (file_util.isSupportedVideoFormat(state.currentFile)) {
+    if (state.currentFile?.let(file_util.isSupportedVideoFormat) == true) {
       // only start the countdown if the video completed
       if (state.isVideoCompleted) {
         _pageChangeTimer?.cancel();
@@ -196,12 +210,12 @@ class _Bloc extends Bloc<_Event, _State> with BlocLogger {
   }
 
   static ({List<int> shuffled, int initial, int? count}) _parseConfig({
-    required List<FileDescriptor> files,
+    required List<int> fileIds,
     required int startIndex,
     required SlideshowConfig config,
   }) {
-    final index = [for (var i = 0; i < files.length; ++i) i];
-    final count = config.isRepeat ? null : files.length;
+    final index = [for (var i = 0; i < fileIds.length; ++i) i];
+    final count = config.isRepeat ? null : fileIds.length;
     if (config.isShuffle) {
       return (
         shuffled: index..shuffle(),
@@ -211,7 +225,7 @@ class _Bloc extends Bloc<_Event, _State> with BlocLogger {
     } else if (config.isReverse) {
       return (
         shuffled: index.reversed.toList(),
-        initial: files.length - 1 - startIndex,
+        initial: fileIds.length - 1 - startIndex,
         count: count,
       );
     } else {
@@ -224,8 +238,7 @@ class _Bloc extends Bloc<_Event, _State> with BlocLogger {
   }
 
   Future<void> _prepareNextPage() async {
-    final file = state.currentFile;
-    if (file_util.isSupportedVideoFormat(file)) {
+    if (state.currentFile?.let(file_util.isSupportedVideoFormat) == true) {
       // for videos, we need to wait until it's ended
       return;
     }
@@ -264,8 +277,9 @@ class _Bloc extends Bloc<_Event, _State> with BlocLogger {
     add(_NextPage(nextPage));
   }
 
+  final FilesController filesController;
   final Account account;
-  final List<FileDescriptor> files;
+  final List<int> fileIds;
   final int startIndex;
   final SlideshowConfig config;
 
diff --git a/app/lib/widget/slideshow_viewer/state_event.dart b/app/lib/widget/slideshow_viewer/state_event.dart
index 44915f7e..c85135f1 100644
--- a/app/lib/widget/slideshow_viewer/state_event.dart
+++ b/app/lib/widget/slideshow_viewer/state_event.dart
@@ -8,7 +8,8 @@ class _State {
     required this.page,
     required this.nextPage,
     required this.shouldAnimateNextPage,
-    required this.currentFile,
+    required this.files,
+    this.currentFile,
     required this.isShowUi,
     required this.isPlay,
     required this.isVideoCompleted,
@@ -19,15 +20,12 @@ class _State {
     required this.hasRequestExit,
   });
 
-  factory _State.init({
-    required FileDescriptor initialFile,
-  }) =>
-      _State(
+  factory _State.init() => const _State(
         hasInit: false,
         page: 0,
         nextPage: 0,
         shouldAnimateNextPage: true,
-        currentFile: initialFile,
+        files: [],
         isShowUi: false,
         isPlay: true,
         isVideoCompleted: false,
@@ -45,7 +43,8 @@ class _State {
   final int page;
   final int nextPage;
   final bool shouldAnimateNextPage;
-  final FileDescriptor currentFile;
+  final List<FileDescriptor?> files;
+  final FileDescriptor? currentFile;
   final bool isShowUi;
   final bool isPlay;
   final bool isVideoCompleted;
@@ -66,6 +65,16 @@ class _Init implements _Event {
   String toString() => _$toString();
 }
 
+@toString
+class _SetFiles implements _Event {
+  const _SetFiles(this.dataMap);
+
+  @override
+  String toString() => _$toString();
+
+  final Map<int, FileDescriptor> dataMap;
+}
+
 @toString
 class _ToggleShowUi implements _Event {
   const _ToggleShowUi();
diff --git a/app/lib/widget/slideshow_viewer/timeline.dart b/app/lib/widget/slideshow_viewer/timeline.dart
index b37ea991..b44755e5 100644
--- a/app/lib/widget/slideshow_viewer/timeline.dart
+++ b/app/lib/widget/slideshow_viewer/timeline.dart
@@ -87,13 +87,26 @@ class _TimelineItem extends StatelessWidget {
           color: isSelected
               ? Theme.of(context).colorScheme.secondaryContainer
               : Colors.transparent,
-          child: PhotoListImage(
-            account: context.bloc.account,
-            previewUrl: NetworkRectThumbnail.imageUrlForFile(
-              context.bloc.account,
-              file,
-            ),
-          ),
+          child: file != null
+              ? PhotoListImage(
+                  account: context.bloc.account,
+                  previewUrl: NetworkRectThumbnail.imageUrlForFile(
+                    context.bloc.account,
+                    file!,
+                  ),
+                )
+              : AspectRatio(
+                  aspectRatio: 1,
+                  child: Container(
+                    alignment: Alignment.center,
+                    padding: const EdgeInsets.all(4),
+                    child: Text(
+                      L10n.global().fileNotFound,
+                      style: Theme.of(context).textTheme.bodySmall,
+                      textAlign: TextAlign.center,
+                    ),
+                  ),
+                ),
         ),
         if (!isSelected)
           Positioned.fill(
@@ -111,6 +124,6 @@ class _TimelineItem extends StatelessWidget {
   }
 
   final int index;
-  final FileDescriptor file;
+  final FileDescriptor? file;
   final bool isSelected;
 }
diff --git a/app/lib/widget/slideshow_viewer/view.dart b/app/lib/widget/slideshow_viewer/view.dart
index df0a30a3..f2aed121 100644
--- a/app/lib/widget/slideshow_viewer/view.dart
+++ b/app/lib/widget/slideshow_viewer/view.dart
@@ -129,6 +129,31 @@ class _ControlBar extends StatelessWidget {
   }
 }
 
+class _InitBody extends StatelessWidget {
+  const _InitBody();
+
+  @override
+  Widget build(BuildContext context) {
+    return Stack(
+      children: [
+        const Center(child: CircularProgressIndicator()),
+        Positioned.directional(
+          textDirection: Directionality.of(context),
+          top: 0,
+          start: 0,
+          child: IconButton(
+            icon: const Icon(Icons.close),
+            tooltip: MaterialLocalizations.of(context).closeButtonTooltip,
+            onPressed: () {
+              Navigator.of(context).pop();
+            },
+          ),
+        ),
+      ],
+    );
+  }
+}
+
 @npLog
 class _Body extends StatelessWidget {
   const _Body();
@@ -259,25 +284,37 @@ class _PageView extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    final file = context.bloc.files[itemIndex];
-    if (file_util.isSupportedImageFormat(file)) {
-      return _ImagePageView(
-        file: file,
-        onLoaded: () {
-          context.addEvent(_PreloadSidePages(page));
-        },
-      );
-    } else if (file_util.isSupportedVideoFormat(file)) {
-      return _VideoPageView(
-        file: file,
-        onCompleted: () {
-          context.addEvent(const _VideoCompleted());
-        },
-      );
-    } else {
-      _log.shout("[build] Unknown file format: ${file.fdMime}");
-      return const SizedBox.shrink();
-    }
+    return _BlocSelector<FileDescriptor?>(
+      selector: (state) => state.files[itemIndex],
+      builder: (context, file) {
+        if (file == null) {
+          return Center(
+            child: Text(
+              L10n.global().fileNotFound,
+              style: Theme.of(context).textTheme.bodyLarge,
+            ),
+          );
+        }
+        if (file_util.isSupportedImageFormat(file)) {
+          return _ImagePageView(
+            file: file,
+            onLoaded: () {
+              context.addEvent(_PreloadSidePages(page));
+            },
+          );
+        } else if (file_util.isSupportedVideoFormat(file)) {
+          return _VideoPageView(
+            file: file,
+            onCompleted: () {
+              context.addEvent(const _VideoCompleted());
+            },
+          );
+        } else {
+          _log.shout("[build] Unknown file format: ${file.fdMime}");
+          return const SizedBox.shrink();
+        }
+      },
+    );
   }
 
   final int page;
diff --git a/app/lib/widget/viewer.dart b/app/lib/widget/viewer.dart
index 08b1addd..0b421aca 100644
--- a/app/lib/widget/viewer.dart
+++ b/app/lib/widget/viewer.dart
@@ -254,7 +254,7 @@ class _WrappedViewerState extends State<_WrappedViewer>
       SlideshowViewer.routeName,
       arguments: SlideshowViewerArguments(
         slideshowRequest.value!.account,
-        slideshowRequest.value!.files,
+        slideshowRequest.value!.fileIds,
         slideshowRequest.value!.startIndex,
         result,
       ),
diff --git a/app/lib/widget/viewer/bloc.dart b/app/lib/widget/viewer/bloc.dart
index 31aa4386..42ccd739 100644
--- a/app/lib/widget/viewer/bloc.dart
+++ b/app/lib/widget/viewer/bloc.dart
@@ -343,14 +343,11 @@ class _Bloc extends Bloc<_Event, _State>
 
   void _onStartSlideshow(_StartSlideshow ev, _Emitter emit) {
     _log.info(ev);
-    final files =
-        state.fileIdOrders.map((id) => state.files[id]).nonNulls.toList();
     final req = _SlideshowRequest(
       account: account,
-      files: files,
-      startIndex: files
-          .indexWhere((e) => e.fdId == ev.fileId)
-          .let((i) => i == -1 ? 0 : i),
+      fileIds: state.fileIdOrders,
+      startIndex:
+          state.fileIdOrders.indexOf(ev.fileId).let((i) => i == -1 ? 0 : i),
     );
     emit(state.copyWith(slideshowRequest: Unique(req)));
   }
diff --git a/app/lib/widget/viewer/type.dart b/app/lib/widget/viewer/type.dart
index 014de030..8d7af11e 100644
--- a/app/lib/widget/viewer/type.dart
+++ b/app/lib/widget/viewer/type.dart
@@ -15,12 +15,12 @@ class _ShareRequest {
 class _SlideshowRequest {
   const _SlideshowRequest({
     required this.account,
-    required this.files,
+    required this.fileIds,
     required this.startIndex,
   });
 
   final Account account;
-  final List<FileDescriptor> files;
+  final List<int> fileIds;
   final int startIndex;
 }