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gpac · Nov 1, 2024 · 003640a · 003640a
1 parent e15adff
commit 003640a
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Showing 5 changed files with 10 additions and 6 deletions.
diff --git a/dist/mp4box.all.js b/dist/mp4box.all.js
@@ -8236,7 +8236,6 @@ ISOFile.prototype.flattenItemInfo = function() {
 				case 0: // offset into the file referenced by the data reference index
 				break;
 				case 1: // offset into the idat box of this meta box
-				Log.warn("Item storage with construction_method : not supported");
 				break;
 				case 2: // offset into another item
 				Log.warn("Item storage with construction_method : not supported");
@@ -8247,6 +8246,9 @@ ISOFile.prototype.flattenItemInfo = function() {
 			for (j = 0; j < itemloc.extents.length; j++) {
 				item.extents[j] = {};
 				item.extents[j].offset = itemloc.extents[j].extent_offset + itemloc.base_offset;
+				if (itemloc.construction_method == 1) {
+					item.extents[j].offset += meta.idat.start + meta.idat.hdr_size;
+				}
 				item.extents[j].length = itemloc.extents[j].extent_length;
 				item.extents[j].alreadyRead = 0;
 				item.size += item.extents[j].length;

diff --git a/dist/mp4box.all.min.js b/dist/mp4box.all.min.js
diff --git a/dist/mp4box.all.min.js.map b/dist/mp4box.all.min.js.map
diff --git a/dist/mp4box.simple.min.js b/dist/mp4box.simple.min.js
diff --git a/src/isofile-item-processing.js b/src/isofile-item-processing.js
@@ -51,7 +51,6 @@ ISOFile.prototype.flattenItemInfo = function() {
 				case 0: // offset into the file referenced by the data reference index
 				break;
 				case 1: // offset into the idat box of this meta box
-				Log.warn("Item storage with construction_method : not supported");
 				break;
 				case 2: // offset into another item
 				Log.warn("Item storage with construction_method : not supported");
@@ -62,6 +61,9 @@ ISOFile.prototype.flattenItemInfo = function() {
 			for (j = 0; j < itemloc.extents.length; j++) {
 				item.extents[j] = {};
 				item.extents[j].offset = itemloc.extents[j].extent_offset + itemloc.base_offset;
+				if (itemloc.construction_method == 1) {
+					item.extents[j].offset += meta.idat.start + meta.idat.hdr_size;
+				}
 				item.extents[j].length = itemloc.extents[j].extent_length;
 				item.extents[j].alreadyRead = 0;
 				item.size += item.extents[j].length;