From a3a7a2786826d89e09bf79320c2689bba7b288ea Mon Sep 17 00:00:00 2001
From: Alex Belov <belov.alexandr1991@gmail.com>
Date: Mon, 1 Mar 2021 12:34:05 +0800
Subject: [PATCH] allow client to provide their own metadata

---
 Library/Sources/SCAssetExportSession.h | 3 +++
 Library/Sources/SCAssetExportSession.m | 8 +++++++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/Library/Sources/SCAssetExportSession.h b/Library/Sources/SCAssetExportSession.h
index 432b82c8..fd9e313c 100644
--- a/Library/Sources/SCAssetExportSession.h
+++ b/Library/Sources/SCAssetExportSession.h
@@ -108,4 +108,7 @@
  */
 - (void)exportAsynchronouslyWithCompletionHandler:(void(^__nullable)(void))completionHandler;
 
+- (void)exportAsynchronouslyWithCompletionHandler:(void(^__nullable)(void))completionHandler
+                                         metadata:(NSArray<AVMutableMetadataItem *> *__nonnull)metadata;
+
 @end
diff --git a/Library/Sources/SCAssetExportSession.m b/Library/Sources/SCAssetExportSession.m
index 1dd38f5a..cfaa9e5f 100644
--- a/Library/Sources/SCAssetExportSession.m
+++ b/Library/Sources/SCAssetExportSession.m
@@ -656,6 +656,12 @@ - (void)_setupVideoUsingTracks:(NSArray *)videoTracks {
 }
 
 - (void)exportAsynchronouslyWithCompletionHandler:(void (^)(void))completionHandler {
+    [self exportAsynchronouslyWithCompletionHandler:completionHandler
+                                           metadata:[SCRecorderTools assetWriterMetadata]];
+}
+
+- (void)exportAsynchronouslyWithCompletionHandler:(void (^)(void))completionHandler
+                                         metadata:(NSArray<AVMutableMetadataItem *> *)metadata {
     _cancelled = NO;
     _nextAllowedVideoFrame = kCMTimeZero;
     NSError *error = nil;
@@ -664,7 +670,7 @@ - (void)exportAsynchronouslyWithCompletionHandler:(void (^)(void))completionHand
     
     _writer = [AVAssetWriter assetWriterWithURL:self.outputUrl fileType:self.outputFileType error:&error];
     _writer.shouldOptimizeForNetworkUse = _shouldOptimizeForNetworkUse;
-    _writer.metadata = [SCRecorderTools assetWriterMetadata];
+    _writer.metadata = metadata;
 
     EnsureSuccess(error, completionHandler);