diff --git a/Parser.go b/Parser.go
index e10196d..d7616b9 100644
--- a/Parser.go
+++ b/Parser.go
@@ -26,6 +26,7 @@ import (
 type Parser struct {
 	reader              io.Reader
 	childBoxDefinitions map[string]map[string]BoxDefinition
+	IgnoreUnknownBoxes  bool
 	Content             []any
 }
 
@@ -119,7 +120,9 @@ func parseNextBox(parser *Parser, reader io.Reader, currentBoxType string, fileP
 		box, err = boxTypeDefinition.Parser(parser, filePosition, boxHeaderSize, boxContentBytes)
 	} else {
 		logger.Println("unknown box type", boxType, "at", filePosition, "in", currentBoxType)
-		return nil, filePosition, false, errors.New("unknown box type " + boxType + " in " + currentBoxType)
+		if !parser.IgnoreUnknownBoxes {
+			return nil, filePosition, false, errors.New("unknown box type " + boxType + " in " + currentBoxType)
+		}
 	}
 
 	// check for box errors
diff --git a/Parser_test.go b/Parser_test.go
index 79a3d3b..6e91767 100644
--- a/Parser_test.go
+++ b/Parser_test.go
@@ -29,7 +29,7 @@ func TestMain(m *testing.M) {
 }
 
 func TestParser(t *testing.T) {
-	parser, err := testFile(t, "test/fmp4.mp4")
+	parser, err := testFile(t, "test/fmp4.mp4", false)
 	if err != nil {
 		t.Error(err)
 	}
@@ -46,7 +46,7 @@ func TestParser(t *testing.T) {
 }
 
 func TestParserFragmentedMP4Init(t *testing.T) {
-	_, err := testFile(t, "test/fmp4_init.mp4")
+	_, err := testFile(t, "test/fmp4_init.mp4", true)
 	if err != nil {
 		t.Error(err)
 	}
@@ -70,12 +70,12 @@ func validateFileType(t *testing.T, parser *Parser) {
 }
 
 func TestParserInvalidSampleCount(t *testing.T) {
-	if _, err := testFile(t, "test/fmp4-incorrect-sample-count.mp4"); err == nil {
+	if _, err := testFile(t, "test/fmp4-incorrect-sample-count.mp4", false); err == nil {
 		t.Error("missing error of invalid sample count of track fragment run box")
 	}
 }
 
-func testFile(t *testing.T, filePath string) (*Parser, error) {
+func testFile(t *testing.T, filePath string, allowIgnore bool) (*Parser, error) {
 	// open test file
 	file, err := os.Open(filePath)
 	if err != nil {
@@ -85,6 +85,7 @@ func testFile(t *testing.T, filePath string) (*Parser, error) {
 
 	// create new parser
 	parser := NewParser(file)
+	parser.IgnoreUnknownBoxes = allowIgnore
 	err = parser.Parse()
 	return parser, err
 }