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D14476.1767084109.diff
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D14476.1767084109.diff
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diff --git a/native/expo-modules/comm-expo-package/ios/MediaModule.swift b/native/expo-modules/comm-expo-package/ios/MediaModule.swift
--- a/native/expo-modules/comm-expo-package/ios/MediaModule.swift
+++ b/native/expo-modules/comm-expo-package/ios/MediaModule.swift
@@ -42,6 +42,7 @@
AsyncFunction("getVideoInfo", getVideoInfo)
AsyncFunction("hasMultipleFrames", hasMultipleFrames)
+ AsyncFunction("generateThumbnail", generateThumbnail)
}
@@ -83,6 +84,28 @@
return count > 1
}
+
+ private func generateThumbnail(inputPath: URL, outputPath: URL) throws {
+ let asset = AVURLAsset(url: inputPath)
+ let generator = AVAssetImageGenerator(asset: asset)
+
+ generator.appliesPreferredTrackTransform = true
+
+ let time = CMTimeMake(value: 0, timescale: 1000)
+
+ let imgRef = try generator.copyCGImage(at: time, actualTime: nil)
+ let thumbnail = UIImage(cgImage: imgRef)
+
+ guard let data = thumbnail.jpegData(compressionQuality: CGFloat(0.9)) else {
+ throw CorruptedImageDataException()
+ }
+
+ do {
+ try data.write(to: outputPath, options: .atomic)
+ } catch let error {
+ throw ImageWriteFailedException(error.localizedDescription)
+ }
+ }
}
// MARK: - Exception definitions
@@ -98,3 +121,15 @@
"Failed to load gif at URI: \(param)"
}
}
+
+private class CorruptedImageDataException: Exception {
+ override var reason: String {
+ "Cannot create image data for saving of the thumbnail of the given video"
+ }
+}
+
+private class ImageWriteFailedException: GenericException<String> {
+ override var reason: String {
+ "Writing image data to the file has failed: \(param)"
+ }
+}

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