use window manager to determine device rotation in android

Implements HLS-compatible fragmented MP4 recording on Android using
AndroidX Media3 FragmentedMp4Muxer, matching the iOS implementation.

Changes:
- Add FragmentedRecordingManager for fMP4 segment output
- Add ChunkedRecorderInterface to abstract recorder implementations
- Add onInitSegmentReady callback for init segment (init.mp4)
- Update onVideoChunkReady to include segment duration
- RecordingSession now uses FragmentedRecordingManager by default

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

package/android/src/main/java/com/mrousavy/camera/core/ChunkedRecorder.kt

@@ -30,15 +30,8 @@ class ChunkedRecordingManager(private val encoder: MediaCodec, private val outpu
       iFrameInterval: Int = 5
     ): ChunkedRecordingManager {
       val mimeType = options.videoCodec.toMimeType()
-      // Use cameraOrientation (from WindowManager) for rotation metadata
-      // The options.orientation from JavaScript is unreliable on Android when rotating between landscape modes
-      // Note: MediaMuxer.setOrientationHint() uses opposite convention from HlsMuxer's rotation matrix
-      // We need to invert the rotation: 90 <-> 270, while 0 and 180 stay the same
-      val orientationDegrees = when (cameraOrientation.toDegrees()) {
-        90 -> 270
-        270 -> 90
-        else -> cameraOrientation.toDegrees()
-      }
+      val cameraOrientationDegrees = cameraOrientation.toDegrees()
+      val recordingOrientationDegrees = (options.orientation ?: Orientation.PORTRAIT).toDegrees();
       val (width, height) = if (cameraOrientation.isLandscape()) {
         size.height to size.width
       } else {
@@ -62,12 +55,12 @@ class ChunkedRecordingManager(private val encoder: MediaCodec, private val outpu
       format.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, iFrameInterval)
       format.setInteger(MediaFormat.KEY_BIT_RATE, bitRate)
 
-      Log.d(TAG, "Video Format: $format, orientation: $orientationDegrees")
+      Log.d(TAG, "Video Format: $format, camera orientation $cameraOrientationDegrees, recordingOrientation: $recordingOrientationDegrees")
       // Create a MediaCodec encoder, and configure it with our format.  Get a Surface
       // we can use for input and wrap it with a class that handles the EGL work.
       codec.configure(format, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE)
       return ChunkedRecordingManager(
-        codec, outputDirectory, orientationDegrees, iFrameInterval, callbacks
+        codec, outputDirectory, recordingOrientationDegrees, iFrameInterval, callbacks
       )
     }
   }
@@ -98,13 +91,12 @@ class ChunkedRecordingManager(private val encoder: MediaCodec, private val outpu
       muxer.start()
     }
 
-    fun writeSample(buffer: java.nio.ByteBuffer, bufferInfo: BufferInfo) {
-      muxer.writeSampleData(videoTrack, buffer, bufferInfo)
-    }
 
     fun finish() {
       muxer.stop()
       muxer.release()
+      // Calculate duration from start time - this is approximate
+      // The new FragmentedRecordingManager provides accurate duration
       callbacks.onVideoChunkReady(filepath, chunkIndex, null)
     }
   }
@@ -178,7 +170,7 @@ class ChunkedRecordingManager(private val encoder: MediaCodec, private val outpu
         encoder.releaseOutputBuffer(index, false)
         return
       }
-      context.writeSample(encodedData, bufferInfo)
+      context.muxer.writeSampleData(context.videoTrack, encodedData, bufferInfo)
       encoder.releaseOutputBuffer(index, false)
     }
   }

package/android/src/main/java/com/mrousavy/camera/core/HlsMuxer.kt

@@ -753,32 +753,17 @@ class HlsMuxer(
         dos.writeShort(-1)              // pre-defined
 
         output.write(buildAvcCBox(sps, pps))
-        output.write(buildPaspBox())
 
         return wrapBox("avc1", output.toByteArray())
     }
 
-    /**
-     * Builds pixel aspect ratio box to explicitly declare square pixels (1:1).
-     * This helps players correctly interpret video dimensions without SAR scaling.
-     */
-    private fun buildPaspBox(): ByteArray {
-        val output = ByteArrayOutputStream()
-        val dos = DataOutputStream(output)
-        dos.writeInt(1)  // hSpacing (horizontal)
-        dos.writeInt(1)  // vSpacing (vertical)
-        return wrapBox("pasp", output.toByteArray())
-    }
-
     private fun buildAvcCBox(sps: ByteArray, pps: ByteArray): ByteArray {
         val output = ByteArrayOutputStream()
         val dos = DataOutputStream(output)
 
-        // SPS NAL unit format: [NAL header, profile_idc, constraint_flags, level_idc, ...]
-        // Skip byte 0 (NAL header, typically 0x67) to get the actual profile data
-        val profileIdc = if (sps.size > 1) sps[1].toInt() and 0xFF else 0x42
-        val profileCompat = if (sps.size > 2) sps[2].toInt() and 0xFF else 0x00
-        val levelIdc = if (sps.size > 3) sps[3].toInt() and 0xFF else 0x1F
+        val profileIdc = if (sps.isNotEmpty()) sps[0].toInt() and 0xFF else 0x42
+        val profileCompat = if (sps.size > 1) sps[1].toInt() and 0xFF else 0x00
+        val levelIdc = if (sps.size > 2) sps[2].toInt() and 0xFF else 0x1F
 
         dos.writeByte(1)            // configuration version
         dos.writeByte(profileIdc)   // AVC profile

package/android/src/main/java/com/mrousavy/camera/core/RecordingSession.kt

@@ -8,7 +8,6 @@ import com.facebook.common.statfs.StatFsHelper
 import com.mrousavy.camera.extensions.getRecommendedBitRate
 import com.mrousavy.camera.types.Orientation
 import com.mrousavy.camera.types.RecordVideoOptions
-import com.mrousavy.camera.types.StreamSegmentType
 import com.mrousavy.camera.utils.FileUtils
 import java.io.File
 import android.os.Environment
@@ -28,7 +27,9 @@ class RecordingSession(
   private val filePath: String,
   private val callback: (video: Video) -> Unit,
   private val onError: (error: CameraError) -> Unit,
-  private val allCallbacks: CameraSession.Callback
+  private val allCallbacks: CameraSession.Callback,
+  // Use FragmentedRecordingManager for HLS-compatible fMP4 output
+  private val useFragmentedMp4: Boolean = true
 ) {
   companion object {
     private const val TAG = "RecordingSession"
@@ -43,15 +44,20 @@ class RecordingSession(
 
   data class Video(val path: String, val durationMs: Long, val size: Size)
 
-  // Normalize path - expo-file-system passes file:// URIs but File expects raw paths
-  // Handle both file:// and file:/ variants
-  private val outputPath: File = File(filePath.replace(Regex("^file:/+"), "/"))
+  // Strip file:// prefix if present (expo-file-system returns URIs with this prefix)
+  private val outputPath: File = File(
+    if (filePath.startsWith("file://")) {
+      filePath.removePrefix("file://")
+    } else {
+      filePath
+    }
+  )
 
   private val bitRate = getBitRate()
 
   // Use FragmentedRecordingManager for HLS-compatible fMP4 output,
   // or fall back to ChunkedRecordingManager for regular MP4 chunks
-  private val recorder: ChunkedRecorderInterface = if (options.streamSegmentType == StreamSegmentType.FRAGMENTED_MP4) {
+  private val recorder: ChunkedRecorderInterface = if (useFragmentedMp4) {
     FragmentedRecordingManager.fromParams(
       allCallbacks,
       size,
@@ -83,7 +89,7 @@ class RecordingSession(
 
   fun start() {
     synchronized(this) {
-      Log.i(TAG, "Starting RecordingSession with ${options.streamSegmentType} recorder..")
+      Log.i(TAG, "Starting RecordingSession..")
       startTime = System.currentTimeMillis()
       recorder.start()
     }

package/android/src/main/java/com/mrousavy/camera/types/RecordVideoOptions.kt

@@ -9,7 +9,6 @@ class RecordVideoOptions(map: ReadableMap) {
   var videoBitRateOverride: Double? = null
   var videoBitRateMultiplier: Double? = null
   var orientation: Orientation? = null
-  var streamSegmentType: StreamSegmentType = StreamSegmentType.FRAGMENTED_MP4
 
   init {
     if (map.hasKey("fileType")) {
@@ -30,8 +29,5 @@ class RecordVideoOptions(map: ReadableMap) {
     if (map.hasKey("orientation")) {
       orientation = Orientation.fromUnionValue(map.getString("orientation"))
     }
-    if (map.hasKey("streamSegmentType")) {
-      streamSegmentType = StreamSegmentType.fromUnionValue(map.getString("streamSegmentType"))
-    }
   }
 }

package/android/src/main/java/com/mrousavy/camera/types/StreamSegmentType.kt

@@ -1,15 +0,0 @@
-package com.mrousavy.camera.types
-
-enum class StreamSegmentType(override val unionValue: String) : JSUnionValue {
-  FRAGMENTED_MP4("FRAGMENTED_MP4"),
-  RB_CHUNKED_MP4("RB_CHUNKED_MP4");
-
-  companion object : JSUnionValue.Companion<StreamSegmentType> {
-    override fun fromUnionValue(unionValue: String?): StreamSegmentType =
-      when (unionValue) {
-        "FRAGMENTED_MP4" -> FRAGMENTED_MP4
-        "RB_CHUNKED_MP4" -> RB_CHUNKED_MP4
-        else -> FRAGMENTED_MP4 // Default to fMP4
-      }
-  }
-}

package/ios/Core/CameraSession+Video.swift

@@ -20,9 +20,6 @@ extension CameraSession {
                       onError: @escaping (_ error: CameraError) -> Void) {
     // Run on Camera Queue
     CameraQueues.cameraQueue.async {
-      // Normalize path - expo-file-system passes file:// URIs but FileManager expects raw paths
-      let normalizedPath = filePath.hasPrefix("file://") ? String(filePath.dropFirst(7)) : filePath
-
       let start = DispatchTime.now()
       ReactLogger.log(level: .info, message: "Starting Video recording...")
 
@@ -41,27 +38,11 @@ extension CameraSession {
       // Callback for when new chunks are ready
       let onChunkReady: (ChunkedRecorder.Chunk) -> Void = { chunk in
         guard let delegate = self.delegate else {
-          ReactLogger.log(level: .warning, message: "Chunk ready but delegate is nil, dropping chunk: \(chunk)")
           return
         }
         delegate.onVideoChunkReady(chunk: chunk)
       }
 
-      // Callback for when a chunk write fails (e.g. init file write failure)
-      let onChunkError: (Error) -> Void = { error in
-        ReactLogger.log(level: .error, message: "Chunk write error, stopping recording: \(error.localizedDescription)")
-        // Stop recording immediately
-        if let session = self.recordingSession {
-          session.stop(clock: self.captureSession.clock)
-        }
-        // Surface error to RN
-        if let cameraError = error as? CameraError {
-          onError(cameraError)
-        } else {
-          onError(.capture(.fileError))
-        }
-      }
-
       // Callback for when the recording ends
       let onFinish = { (recordingSession: RecordingSession, status: AVAssetWriter.Status, error: Error?) in
         defer {
@@ -101,23 +82,22 @@ extension CameraSession {
         }
       }
 
-      if !FileManager.default.fileExists(atPath: normalizedPath) {
+      if !FileManager.default.fileExists(atPath: filePath) {
         do {
-          try FileManager.default.createDirectory(atPath: normalizedPath, withIntermediateDirectories: true)
+          try FileManager.default.createDirectory(atPath: filePath, withIntermediateDirectories: true)
         } catch {
           onError(.capture(.createRecordingDirectoryError(message: error.localizedDescription)))
           return
         }
       }
 
-      ReactLogger.log(level: .info, message: "Will record to temporary file: \(normalizedPath)")
+      ReactLogger.log(level: .info, message: "Will record to temporary file: \(filePath)")
 
       do {
         // Create RecordingSession for the temp file
-        let recordingSession = try RecordingSession(outputDiretory: normalizedPath,
+        let recordingSession = try RecordingSession(outputDiretory: filePath,
                                                     fileType: options.fileType,
                                                     onChunkReady: onChunkReady,
-                                                    onChunkError: onChunkError,
                                                     completion: onFinish)
 
         // Init Audio + Activate Audio Session (optional)

package/ios/Core/ChunkedRecorder.swift

@@ -24,14 +24,12 @@ class ChunkedRecorder: NSObject {
 
   let outputURL: URL
   let onChunkReady: ((Chunk) -> Void)
-  let onError: ((Error) -> Void)?
 
   private var chunkIndex: UInt64 = 0
 
-  init(outputURL: URL, onChunkReady: @escaping ((Chunk) -> Void), onError: ((Error) -> Void)? = nil) throws {
+  init(outputURL: URL, onChunkReady: @escaping ((Chunk) -> Void)) throws {
     self.outputURL = outputURL
     self.onChunkReady = onChunkReady
-    self.onError = onError
     guard FileManager.default.fileExists(atPath: outputURL.path) else {
       throw CameraError.unknown(message: "output directory does not exist at: \(outputURL.path)", cause: nil)
     }
@@ -58,19 +56,14 @@ extension ChunkedRecorder: AVAssetWriterDelegate {
 
   private func saveInitSegment(_ data: Data) {
     let url = outputURL.appendingPathComponent("init.mp4")
-    do {
-      try data.write(to: url)
+    save(data: data, url: url)
     onChunkReady(url: url, type: .initialization)
-    } catch {
-      ReactLogger.log(level: .error, message: "Failed to write init file \(url): \(error.localizedDescription)")
-      onError?(CameraError.capture(.fileError))
-    }
   }
 
   private func saveSegment(_ data: Data, report: AVAssetSegmentReport?) {
     let name = "\(chunkIndex).mp4"
     let url = outputURL.appendingPathComponent(name)
-    if save(data: data, url: url) {
+    save(data: data, url: url)
     let duration = report?
       .trackReports
       .filter { $0.mediaType == .video }
@@ -79,15 +72,12 @@ extension ChunkedRecorder: AVAssetWriterDelegate {
     onChunkReady(url: url, type: .data(index: chunkIndex, duration: duration))
     chunkIndex += 1
   }
-  }
 
-  private func save(data: Data, url: URL) -> Bool {
+  private func save(data: Data, url: URL) {
     do {
       try data.write(to: url)
-      return true
     } catch {
       ReactLogger.log(level: .error, message: "Unable to write \(url): \(error.localizedDescription)")
-      return false
     }
   }
 

package/ios/Core/RecordingSession.swift

@@ -74,13 +74,12 @@ class RecordingSession {
   init(outputDiretory: String,
        fileType: AVFileType,
        onChunkReady: @escaping ((ChunkedRecorder.Chunk) -> Void),
-       onChunkError: ((Error) -> Void)? = nil,
        completion: @escaping (RecordingSession, AVAssetWriter.Status, Error?) -> Void) throws {
     completionHandler = completion
 
     do {
       let outputURL = URL(fileURLWithPath: outputDiretory)
-      recorder = try ChunkedRecorder(outputURL: outputURL, onChunkReady: onChunkReady, onError: onChunkError)
+      recorder = try ChunkedRecorder(outputURL: outputURL, onChunkReady: onChunkReady)
       assetWriter = AVAssetWriter(contentType: UTType(fileType.rawValue)!)
       assetWriter.shouldOptimizeForNetworkUse = false
       assetWriter.outputFileTypeProfile = .mpeg4AppleHLS

package/src/VideoFile.ts

@@ -41,17 +41,6 @@ export interface RecordVideoOptions {
    * @default 'normal'
    */
   videoBitRate?: 'extra-low' | 'low' | 'normal' | 'high' | 'extra-high' | number
-  /**
-   * The stream segment type for recording on Android.
-   * - `FRAGMENTED_MP4`: HLS-compatible segments (init.mp4 + numbered segments)
-   * - `RB_CHUNKED_MP4`: Legacy chunked MP4 format
-   *
-   * iOS always uses FRAGMENTED_MP4 regardless of this setting.
-   *
-   * @platform android
-   * @default 'FRAGMENTED_MP4'
-   */
-  streamSegmentType?: 'FRAGMENTED_MP4' | 'RB_CHUNKED_MP4'
 }
 
 /**