From aec51348d4c1d4d3701b15b0d60ef623a8861b19 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Manuel=20Rodri=CC=81guez?= <mrodriguez@whiteguru.com>
Date: Fri, 8 Apr 2022 07:41:41 +0200
Subject: [PATCH] fix(ios): Scale videos

---
 ios/Plugin/SimpleSessionExporter.swift | 19 ++++++++-----------
 1 file changed, 8 insertions(+), 11 deletions(-)

diff --git a/ios/Plugin/SimpleSessionExporter.swift b/ios/Plugin/SimpleSessionExporter.swift
index d3722bb..64a522d 100644
--- a/ios/Plugin/SimpleSessionExporter.swift
+++ b/ios/Plugin/SimpleSessionExporter.swift
@@ -113,7 +113,14 @@ extension SimpleSessionExporter {
             start: .zero,
             duration: composition.duration)
         videoComposition.instructions = [instruction]
-        let layerInstruction = compositionLayerInstruction(for: compositionTrack, assetTrack: assetTrack)
+        
+        let layerInstruction = AVMutableVideoCompositionLayerInstruction(assetTrack: compositionTrack)
+        let transform = assetTrack.preferredTransform.scaledBy(
+            x: videoSize.width / assetTrack.naturalSize.width,
+            y: videoSize.height / assetTrack.naturalSize.height
+        )
+        layerInstruction.setTransform(transform, at: CMTime.zero)
+        
         instruction.layerInstructions = [layerInstruction]
         
         // Export
@@ -144,16 +151,6 @@ extension SimpleSessionExporter {
             }
         }
     }
-    
-    private func compositionLayerInstruction(for track: AVCompositionTrack, assetTrack: AVAssetTrack) -> AVMutableVideoCompositionLayerInstruction {
-        let instruction = AVMutableVideoCompositionLayerInstruction(assetTrack: track)
-        let transform = assetTrack.preferredTransform
-        
-        instruction.setTransform(transform, at: .zero)
-        
-        return instruction
-    }
-    
 }
 
 // MARK: - AVAsset extension