info: access to motion photo video, improved video metadata stream handling

android/app/src/main/kotlin/deckers/thibault/aves/channel/calls/MetadataHandler.kt

@@ -76,6 +76,7 @@ import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.launch
 import org.beyka.tiffbitmapfactory.TiffBitmapFactory
 import java.io.File
+import java.io.InputStream
 import java.text.ParseException
 import java.util.*
 import kotlin.math.roundToLong
@@ -90,6 +91,7 @@ class MetadataHandler(private val context: Context) : MethodCallHandler {
             "getPanoramaInfo" -> GlobalScope.launch(Dispatchers.IO) { safe(call, result, ::getPanoramaInfo) }
             "getContentResolverProp" -> GlobalScope.launch(Dispatchers.IO) { safe(call, result, ::getContentResolverProp) }
             "getExifThumbnails" -> GlobalScope.launch(Dispatchers.IO) { safesus(call, result, ::getExifThumbnails) }
+            "extractMotionPhotoVideo" -> GlobalScope.launch(Dispatchers.IO) { safe(call, result, ::extractMotionPhotoVideo) }
             "extractVideoEmbeddedPicture" -> GlobalScope.launch(Dispatchers.IO) { safe(call, result, ::extractVideoEmbeddedPicture) }
             "extractXmpDataProp" -> GlobalScope.launch(Dispatchers.IO) { safe(call, result, ::extractXmpDataProp) }
             else -> result.notImplemented()
@@ -775,6 +777,41 @@ class MetadataHandler(private val context: Context) : MethodCallHandler {
         result.success(thumbnails)
     }
 
+    private fun extractMotionPhotoVideo(call: MethodCall, result: MethodChannel.Result) {
+        val mimeType = call.argument<String>("mimeType")
+        val uri = call.argument<String>("uri")?.let { Uri.parse(it) }
+        val sizeBytes = call.argument<Number>("sizeBytes")?.toLong()
+        if (mimeType == null || uri == null || sizeBytes == null) {
+            result.error("extractMotionPhotoVideo-args", "failed because of missing arguments", null)
+            return
+        }
+
+        try {
+            Metadata.openSafeInputStream(context, uri, mimeType, sizeBytes)?.use { input ->
+                val metadata = ImageMetadataReader.readMetadata(input)
+                for (dir in metadata.getDirectoriesOfType(XmpDirectory::class.java)) {
+                    val xmpMeta = dir.xmpMeta
+                    // offset from end
+                    var offsetFromEnd: Int? = null
+                    xmpMeta.getSafeInt(XMP.GCAMERA_SCHEMA_NS, XMP.GCAMERA_VIDEO_OFFSET_PROP_NAME) { offsetFromEnd = it }
+                    if (offsetFromEnd != null) {
+                        StorageUtils.openInputStream(context, uri)?.let { original ->
+                            original.skip(sizeBytes - offsetFromEnd!!)
+                            copyEmbeddedBytes(result, MimeTypes.MP4, original)
+                        }
+                        return
+                    }
+                }
+            }
+        } catch (e: Exception) {
+            Log.w(LOG_TAG, "failed to extract video from motion photo", e)
+        } catch (e: NoClassDefFoundError) {
+            Log.w(LOG_TAG, "failed to extract video from motion photo", e)
+        }
+
+        result.error("extractMotionPhotoVideo-empty", "failed to extract video from motion photo at uri=$uri", null)
+    }
+
     private fun extractVideoEmbeddedPicture(call: MethodCall, result: MethodChannel.Result) {
         val uri = call.argument<String>("uri")?.let { Uri.parse(it) }
         if (uri == null) {
@@ -794,7 +831,7 @@ class MetadataHandler(private val context: Context) : MethodCallHandler {
                         }
                     }
                     embedMimeType?.let { mime ->
-                        copyEmbeddedBytes(bytes, mime, result)
+                        copyEmbeddedBytes(result, mime, bytes.inputStream())
                         return
                     }
                 }
@@ -843,7 +880,7 @@ class MetadataHandler(private val context: Context) : MethodCallHandler {
                             }
                         }
 
-                        copyEmbeddedBytes(embedBytes, embedMimeType, result)
+                        copyEmbeddedBytes(result, embedMimeType, embedBytes.inputStream())
                         return
                     } catch (e: XMPException) {
                         result.error("extractXmpDataProp-xmp", "failed to read XMP directory for uri=$uri prop=$dataPropPath", e.message)
@@ -859,11 +896,11 @@ class MetadataHandler(private val context: Context) : MethodCallHandler {
         result.error("extractXmpDataProp-empty", "failed to extract file from XMP uri=$uri prop=$dataPropPath", null)
     }
 
-    private fun copyEmbeddedBytes(embedBytes: ByteArray, embedMimeType: String, result: MethodChannel.Result) {
+    private fun copyEmbeddedBytes(result: MethodChannel.Result, embedMimeType: String, embedByteStream: InputStream) {
         val embedFile = File.createTempFile("aves", null, context.cacheDir).apply {
             deleteOnExit()
             outputStream().use { outputStream ->
-                embedBytes.inputStream().use { inputStream ->
+                embedByteStream.use { inputStream ->
                     inputStream.copyTo(outputStream)
                 }
             }

android/app/src/main/kotlin/deckers/thibault/aves/metadata/XMP.kt

@@ -42,6 +42,12 @@ object XMP {
 
     fun isDataPath(path: String) = knownDataPaths.contains(path)
 
+    // motion photo
+
+    const val GCAMERA_SCHEMA_NS = "http://ns.google.com/photos/1.0/camera/"
+
+    const val GCAMERA_VIDEO_OFFSET_PROP_NAME = "GCamera:MicroVideoOffset"
+
     // panorama
     // cf https://developers.google.com/streetview/spherical-metadata
 

android/app/src/main/kotlin/deckers/thibault/aves/utils/MimeTypes.kt

@@ -39,6 +39,7 @@ object MimeTypes {
 
     private const val MP2T = "video/mp2t"
     private const val MP2TS = "video/mp2ts"
+    const val MP4 = "video/mp4"
     private const val WEBM = "video/webm"
 
     fun isImage(mimeType: String?) = mimeType != null && mimeType.startsWith(IMAGE)

lib/model/video/metadata.dart

@@ -115,7 +115,9 @@ class VideoMetadataFormatter {
               save('Channel Layout', _formatChannelLayout(value));
               break;
             case Keys.codecName:
-              save('Format', _formatCodecName(value));
+              if (value != 'none') {
+                save('Format', _formatCodecName(value));
+              }
               break;
             case Keys.codecPixelFormat:
               if (streamType == StreamTypes.video) {
@@ -296,6 +298,7 @@ class VideoMetadataFormatter {
 }
 
 class StreamTypes {
+  static const attachment = 'attachment';
   static const audio = 'audio';
   static const metadata = 'metadata';
   static const subtitle = 'subtitle';

lib/ref/xmp.dart

@@ -16,6 +16,7 @@ class XMP {
     'GettyImagesGIFT': 'Getty Images',
     'GIMP': 'GIMP',
     'GCamera': 'Google Camera',
+    'GCreations': 'Google Creations',
     'GFocus': 'Google Focus',
     'GPano': 'Google Panorama',
     'illustrator': 'Illustrator',

lib/services/metadata_service.dart

@@ -24,6 +24,8 @@ abstract class MetadataService {
 
   Future<List<Uint8List>> getExifThumbnails(AvesEntry entry);
 
+  Future<Map> extractMotionPhotoVideo(AvesEntry entry);
+
   Future<Map> extractVideoEmbeddedPicture(String uri);
 
   Future<Map> extractXmpDataProp(AvesEntry entry, String propPath, String propMimeType);
@@ -167,6 +169,21 @@ class PlatformMetadataService implements MetadataService {
     return [];
   }
 
+  @override
+  Future<Map> extractMotionPhotoVideo(AvesEntry entry) async {
+    try {
+      final result = await platform.invokeMethod('extractMotionPhotoVideo', <String, dynamic>{
+        'mimeType': entry.mimeType,
+        'uri': entry.uri,
+        'sizeBytes': entry.sizeBytes,
+      });
+      return result;
+    } on PlatformException catch (e) {
+      debugPrint('extractMotionPhotoVideo failed with code=${e.code}, exception=${e.message}, details=${e.details}');
+    }
+    return null;
+  }
+
   @override
   Future<Map> extractVideoEmbeddedPicture(String uri) async {
     try {

lib/widgets/viewer/info/metadata/metadata_dir_tile.dart

@@ -121,6 +121,9 @@ class MetadataDirTile extends StatelessWidget with FeedbackMixin {
   Future<void> _openEmbeddedData(BuildContext context, OpenEmbeddedDataNotification notification) async {
     Map fields;
     switch (notification.source) {
+      case EmbeddedDataSource.motionPhotoVideo:
+        fields = await metadataService.extractMotionPhotoVideo(entry);
+        break;
       case EmbeddedDataSource.videoCover:
         fields = await metadataService.extractVideoEmbeddedPicture(entry.uri);
         break;

lib/widgets/viewer/info/metadata/metadata_section.dart

@@ -193,6 +193,8 @@ class _MetadataSectionSliverState extends State<MetadataSectionSliver> with Auto
       String getTypeText(Map stream) {
         final type = stream[Keys.streamType] ?? StreamTypes.unknown;
         switch (type) {
+          case StreamTypes.attachment:
+            return 'Attachment';
           case StreamTypes.audio:
             return 'Audio';
           case StreamTypes.metadata:
@@ -209,8 +211,8 @@ class _MetadataSectionSliverState extends State<MetadataSectionSliver> with Auto
       }
 
       final allStreams = (mediaInfo[Keys.streams] as List).cast<Map>();
-      final unknownStreams = allStreams.where((stream) => stream[Keys.streamType] == StreamTypes.unknown).toList();
+      final attachmentStreams = allStreams.where((stream) => stream[Keys.streamType] == StreamTypes.attachment).toList();
-      final knownStreams = allStreams.whereNot(unknownStreams.contains);
+      final knownStreams = allStreams.whereNot(attachmentStreams.contains);
 
       // display known streams as separate directories (e.g. video, audio, subs)
       if (knownStreams.isNotEmpty) {
@@ -228,18 +230,18 @@ class _MetadataSectionSliverState extends State<MetadataSectionSliver> with Auto
         }
       }
 
-      // display unknown streams as attachments (e.g. fonts)
+      // group attachments by format (e.g. TTF fonts)
-      if (unknownStreams.isNotEmpty) {
+      if (attachmentStreams.isNotEmpty) {
-        final unknownCodecCount = <String, List<String>>{};
+        final formatCount = <String, List<String>>{};
-        for (final stream in unknownStreams) {
+        for (final stream in attachmentStreams) {
           final codec = (stream[Keys.codecName] as String ?? 'unknown').toUpperCase();
-          if (!unknownCodecCount.containsKey(codec)) {
+          if (!formatCount.containsKey(codec)) {
-            unknownCodecCount[codec] = [];
+            formatCount[codec] = [];
           }
-          unknownCodecCount[codec].add(stream[Keys.filename]);
+          formatCount[codec].add(stream[Keys.filename]);
         }
-        if (unknownCodecCount.isNotEmpty) {
+        if (formatCount.isNotEmpty) {
-          final rawTags = unknownCodecCount.map((key, value) {
+          final rawTags = formatCount.map((key, value) {
             final count = value.length;
             // remove duplicate names, so number of displayed names may not match displayed count
             final names = value.where((v) => v != null).toSet().toList()..sort(compareAsciiUpperCase);

lib/widgets/viewer/info/metadata/xmp_namespaces.dart

@@ -4,21 +4,61 @@ import 'package:aves/utils/constants.dart';
 import 'package:aves/utils/string_utils.dart';
 import 'package:aves/widgets/common/identity/highlight_title.dart';
 import 'package:aves/widgets/viewer/info/common.dart';
+import 'package:aves/widgets/viewer/info/metadata/xmp_ns/exif.dart';
+import 'package:aves/widgets/viewer/info/metadata/xmp_ns/google.dart';
+import 'package:aves/widgets/viewer/info/metadata/xmp_ns/iptc.dart';
+import 'package:aves/widgets/viewer/info/metadata/xmp_ns/mwg.dart';
+import 'package:aves/widgets/viewer/info/metadata/xmp_ns/photoshop.dart';
+import 'package:aves/widgets/viewer/info/metadata/xmp_ns/tiff.dart';
+import 'package:aves/widgets/viewer/info/metadata/xmp_ns/xmp.dart';
 import 'package:collection/collection.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 
 class XmpNamespace {
   final String namespace;
+  final Map<String, String> rawProps;
 
-  const XmpNamespace(this.namespace);
+  const XmpNamespace(this.namespace, this.rawProps);
+
+  factory XmpNamespace.create(String namespace, Map<String, String> rawProps) {
+    switch (namespace) {
+      case XmpBasicNamespace.ns:
+        return XmpBasicNamespace(rawProps);
+      case XmpExifNamespace.ns:
+        return XmpExifNamespace(rawProps);
+      case XmpGAudioNamespace.ns:
+        return XmpGAudioNamespace(rawProps);
+      case XmpGCameraNamespace.ns:
+        return XmpGCameraNamespace(rawProps);
+      case XmpGDepthNamespace.ns:
+        return XmpGDepthNamespace(rawProps);
+      case XmpGImageNamespace.ns:
+        return XmpGImageNamespace(rawProps);
+      case XmpIptcCoreNamespace.ns:
+        return XmpIptcCoreNamespace(rawProps);
+      case XmpMgwRegionsNamespace.ns:
+        return XmpMgwRegionsNamespace(rawProps);
+      case XmpMMNamespace.ns:
+        return XmpMMNamespace(rawProps);
+      case XmpNoteNamespace.ns:
+        return XmpNoteNamespace(rawProps);
+      case XmpPhotoshopNamespace.ns:
+        return XmpPhotoshopNamespace(rawProps);
+      case XmpTiffNamespace.ns:
+        return XmpTiffNamespace(rawProps);
+      default:
+        return XmpNamespace(namespace, rawProps);
+    }
+  }
 
   String get displayTitle => XMP.namespaces[namespace] ?? namespace;
 
-  List<Widget> buildNamespaceSection({
+  Map<String, String> get buildProps => rawProps;
-    @required List<MapEntry<String, String>> rawProps,
+
-  }) {
+  List<Widget> buildNamespaceSection() {
-    final props = rawProps
+    final props = buildProps
+        .entries
         .map((kv) {
           final prop = XmpProp(kv.key, kv.value);
           return extractData(prop) ? null : prop;

lib/widgets/viewer/info/metadata/xmp_ns/exif.dart

@@ -5,7 +5,7 @@ import 'package:aves/widgets/viewer/info/metadata/xmp_namespaces.dart';
 class XmpExifNamespace extends XmpNamespace {
   static const ns = 'exif';
 
-  XmpExifNamespace() : super(ns);
+  XmpExifNamespace(Map<String, String> rawProps) : super(ns, rawProps);
 
   @override
   String get displayTitle => 'Exif';

lib/widgets/viewer/info/metadata/xmp_ns/google.dart

@@ -5,7 +5,7 @@ import 'package:aves/widgets/viewer/info/notifications.dart';
 import 'package:tuple/tuple.dart';
 
 abstract class XmpGoogleNamespace extends XmpNamespace {
-  XmpGoogleNamespace(String ns) : super(ns);
+  XmpGoogleNamespace(String ns, Map<String, String> rawProps) : super(ns, rawProps);
 
   List<Tuple2<String, String>> get dataProps;
 
@@ -34,7 +34,7 @@ abstract class XmpGoogleNamespace extends XmpNamespace {
 class XmpGAudioNamespace extends XmpGoogleNamespace {
   static const ns = 'GAudio';
 
-  XmpGAudioNamespace() : super(ns);
+  XmpGAudioNamespace(Map<String, String> rawProps) : super(ns, rawProps);
 
   @override
   List<Tuple2<String, String>> get dataProps => [Tuple2('$ns:Data', '$ns:Mime')];
@@ -46,7 +46,7 @@ class XmpGAudioNamespace extends XmpGoogleNamespace {
 class XmpGDepthNamespace extends XmpGoogleNamespace {
   static const ns = 'GDepth';
 
-  XmpGDepthNamespace() : super(ns);
+  XmpGDepthNamespace(Map<String, String> rawProps) : super(ns, rawProps);
 
   @override
   List<Tuple2<String, String>> get dataProps => [
@@ -61,7 +61,7 @@ class XmpGDepthNamespace extends XmpGoogleNamespace {
 class XmpGImageNamespace extends XmpGoogleNamespace {
   static const ns = 'GImage';
 
-  XmpGImageNamespace() : super(ns);
+  XmpGImageNamespace(Map<String, String> rawProps) : super(ns, rawProps);
 
   @override
   List<Tuple2<String, String>> get dataProps => [Tuple2('$ns:Data', '$ns:Mime')];
@@ -69,3 +69,35 @@ class XmpGImageNamespace extends XmpGoogleNamespace {
   @override
   String get displayTitle => 'Google Image';
 }
+
+class XmpGCameraNamespace extends XmpNamespace {
+  static const ns = 'GCamera';
+  static const videoOffsetKey = 'GCamera:MicroVideoOffset';
+  static const videoDataKey = 'Data';
+
+  bool _isMotionPhoto;
+
+  XmpGCameraNamespace(Map<String, String> rawProps) : super(ns, rawProps) {
+    _isMotionPhoto = rawProps.keys.any((key) => key == videoOffsetKey);
+  }
+
+  @override
+  Map<String, String> get buildProps {
+    return _isMotionPhoto
+        ? Map.fromEntries({
+            MapEntry(videoDataKey, '[skipped]'),
+            ...rawProps.entries,
+          })
+        : rawProps;
+  }
+
+  @override
+  Map<String, InfoLinkHandler> linkifyValues(List<XmpProp> props) {
+    return {
+      videoDataKey: InfoLinkHandler(
+        linkText: (context) => context.l10n.viewerInfoOpenLinkText,
+        onTap: (context) => OpenEmbeddedDataNotification.motionPhotoVideo().dispatch(context),
+      ),
+    };
+  }
+}

lib/widgets/viewer/info/metadata/xmp_ns/iptc.dart

@@ -9,7 +9,7 @@ class XmpIptcCoreNamespace extends XmpNamespace {
 
   final creatorContactInfo = <String, String>{};
 
-  XmpIptcCoreNamespace() : super(ns);
+  XmpIptcCoreNamespace(Map<String, String> rawProps) : super(ns, rawProps);
 
   @override
   String get displayTitle => 'IPTC Core';

lib/widgets/viewer/info/metadata/xmp_ns/mwg.dart

@@ -12,7 +12,7 @@ class XmpMgwRegionsNamespace extends XmpNamespace {
   final dimensions = <String, String>{};
   final regionList = <int, Map<String, String>>{};
 
-  XmpMgwRegionsNamespace() : super(ns);
+  XmpMgwRegionsNamespace(Map<String, String> rawProps) : super(ns, rawProps);
 
   @override
   String get displayTitle => 'Regions';

lib/widgets/viewer/info/metadata/xmp_ns/photoshop.dart

@@ -5,7 +5,7 @@ import 'package:aves/widgets/viewer/info/metadata/xmp_namespaces.dart';
 class XmpPhotoshopNamespace extends XmpNamespace {
   static const ns = 'photoshop';
 
-  XmpPhotoshopNamespace() : super(ns);
+  XmpPhotoshopNamespace(Map<String, String> rawProps) : super(ns, rawProps);
 
   @override
   String get displayTitle => 'Photoshop';

lib/widgets/viewer/info/metadata/xmp_ns/tiff.dart

@@ -8,7 +8,7 @@ class XmpTiffNamespace extends XmpNamespace {
   @override
   String get displayTitle => 'TIFF';
 
-  XmpTiffNamespace() : super(ns);
+  XmpTiffNamespace(Map<String, String> rawProps) : super(ns, rawProps);
 
   @override
   String formatValue(XmpProp prop) {

lib/widgets/viewer/info/metadata/xmp_ns/xmp.dart

@@ -14,7 +14,7 @@ class XmpBasicNamespace extends XmpNamespace {
 
   final thumbnails = <int, Map<String, String>>{};
 
-  XmpBasicNamespace() : super(ns);
+  XmpBasicNamespace(Map<String, String> rawProps) : super(ns, rawProps);
 
   @override
   String get displayTitle => 'Basic';
@@ -61,7 +61,7 @@ class XmpMMNamespace extends XmpNamespace {
   final ingredients = <int, Map<String, String>>{};
   final pantry = <int, Map<String, String>>{};
 
-  XmpMMNamespace() : super(ns);
+  XmpMMNamespace(Map<String, String> rawProps) : super(ns, rawProps);
 
   @override
   String get displayTitle => 'Media Management';
@@ -114,7 +114,7 @@ class XmpNoteNamespace extends XmpNamespace {
   // `xmpNote:HasExtendedXMP` is structural and should not be displayed to users
   static const hasExtendedXmp = '$ns:HasExtendedXMP';
 
-  XmpNoteNamespace() : super(ns);
+  XmpNoteNamespace(Map<String, String> rawProps) : super(ns, rawProps);
 
   @override
   bool extractData(XmpProp prop) {

lib/widgets/viewer/info/metadata/xmp_tile.dart

@@ -4,13 +4,6 @@ import 'package:aves/model/entry.dart';
 import 'package:aves/ref/xmp.dart';
 import 'package:aves/widgets/common/identity/aves_expansion_tile.dart';
 import 'package:aves/widgets/viewer/info/metadata/xmp_namespaces.dart';
-import 'package:aves/widgets/viewer/info/metadata/xmp_ns/exif.dart';
-import 'package:aves/widgets/viewer/info/metadata/xmp_ns/google.dart';
-import 'package:aves/widgets/viewer/info/metadata/xmp_ns/iptc.dart';
-import 'package:aves/widgets/viewer/info/metadata/xmp_ns/mwg.dart';
-import 'package:aves/widgets/viewer/info/metadata/xmp_ns/photoshop.dart';
-import 'package:aves/widgets/viewer/info/metadata/xmp_ns/tiff.dart';
-import 'package:aves/widgets/viewer/info/metadata/xmp_ns/xmp.dart';
 import 'package:collection/collection.dart';
 import 'package:flutter/material.dart';
 
@@ -36,40 +29,13 @@ class _XmpDirTileState extends State<XmpDirTile> {
 
   @override
   Widget build(BuildContext context) {
-    final sections = SplayTreeMap<XmpNamespace, List<MapEntry<String, String>>>.of(
+    final sections = groupBy(widget.tags.entries, (kv) {
-      groupBy(widget.tags.entries, (kv) {
+      final fullKey = kv.key;
-        final fullKey = kv.key;
+      final i = fullKey.indexOf(XMP.propNamespaceSeparator);
-        final i = fullKey.indexOf(XMP.propNamespaceSeparator);
+      final namespace = i == -1 ? '' : fullKey.substring(0, i);
-        final namespace = i == -1 ? '' : fullKey.substring(0, i);
+      return namespace;
-        switch (namespace) {
+    }).entries.map((kv) => XmpNamespace.create(kv.key, Map.fromEntries(kv.value))).toList()
-          case XmpBasicNamespace.ns:
+      ..sort((a, b) => compareAsciiUpperCase(a.displayTitle, b.displayTitle));
-            return XmpBasicNamespace();
-          case XmpExifNamespace.ns:
-            return XmpExifNamespace();
-          case XmpGAudioNamespace.ns:
-            return XmpGAudioNamespace();
-          case XmpGDepthNamespace.ns:
-            return XmpGDepthNamespace();
-          case XmpGImageNamespace.ns:
-            return XmpGImageNamespace();
-          case XmpIptcCoreNamespace.ns:
-            return XmpIptcCoreNamespace();
-          case XmpMgwRegionsNamespace.ns:
-            return XmpMgwRegionsNamespace();
-          case XmpMMNamespace.ns:
-            return XmpMMNamespace();
-          case XmpNoteNamespace.ns:
-            return XmpNoteNamespace();
-          case XmpPhotoshopNamespace.ns:
-            return XmpPhotoshopNamespace();
-          case XmpTiffNamespace.ns:
-            return XmpTiffNamespace();
-          default:
-            return XmpNamespace(namespace);
-        }
-      }),
-      (a, b) => compareAsciiUpperCase(a.displayTitle, b.displayTitle),
-    );
     return AvesExpansionTile(
       title: 'XMP',
       expandedNotifier: widget.expandedNotifier,
@@ -79,11 +45,7 @@ class _XmpDirTileState extends State<XmpDirTile> {
           padding: EdgeInsets.only(left: 8, right: 8, bottom: 8),
           child: Column(
             crossAxisAlignment: CrossAxisAlignment.start,
-            children: sections.entries
+            children: sections.expand((section) => section.buildNamespaceSection()).toList(),
-                .expand((kv) => kv.key.buildNamespaceSection(
-                      rawProps: kv.value,
-                    ))
-                .toList(),
           ),
         ),
       ],

lib/widgets/viewer/info/notifications.dart

@@ -28,7 +28,7 @@ class OpenTempEntryNotification extends Notification {
   String toString() => '$runtimeType#${shortHash(this)}{entry=$entry}';
 }
 
-enum EmbeddedDataSource { videoCover, xmp }
+enum EmbeddedDataSource { motionPhotoVideo, videoCover, xmp }
 
 class OpenEmbeddedDataNotification extends Notification {
   final EmbeddedDataSource source;
@@ -41,6 +41,10 @@ class OpenEmbeddedDataNotification extends Notification {
     this.mimeType,
   });
 
+  factory OpenEmbeddedDataNotification.motionPhotoVideo() => OpenEmbeddedDataNotification._private(
+        source: EmbeddedDataSource.motionPhotoVideo,
+      );
+
   factory OpenEmbeddedDataNotification.videoCover() => OpenEmbeddedDataNotification._private(
         source: EmbeddedDataSource.videoCover,
       );

pubspec.lock

@@ -197,7 +197,7 @@ packages:
     description:
       path: "."
       ref: aves
-      resolved-ref: "0f25874db46d1af6fcfbeb8722915cbc211a10fb"
+      resolved-ref: "0100934c469f35f575f3f84e17116f13c326f393"
       url: "git://github.com/deckerst/fijkplayer.git"
     source: git
     version: "0.8.7"