录音实现

@@ -3,6 +3,8 @@
       android:versionCode="1"
       android:versionName="1.1">
     <uses-permission android:name="android.permission.CAMERA" />
+    <uses-permission android:name="android.permission.RECORD_AUDIO" />
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
     <uses-feature android:name="android.hardware.camera2.full" />
     <uses-feature android:name="android.hardware.camera" android:required="false" />
 

@@ -19,6 +19,7 @@ import android.app.Activity;
 import android.content.pm.PackageManager;
 import android.graphics.PixelFormat;
 import android.os.Bundle;
+import android.os.Environment;
 import android.util.Log;
 import android.view.Surface;
 import android.view.SurfaceHolder;
@@ -28,6 +29,7 @@ import android.view.WindowManager;
 import android.widget.AdapterView;
 import android.widget.Button;
 import android.widget.Spinner;
+import android.widget.Toast;
 
 import android.support.v4.app.ActivityCompat;
 import android.support.v4.content.ContextCompat;
@@ -35,9 +37,11 @@ import android.support.v4.content.ContextCompat;
 public class MainActivity extends Activity implements SurfaceHolder.Callback
 {
     public static final int REQUEST_CAMERA = 100;
+    public static final int REQUEST_RECORD_AUDIO = 101;
 
     private YOLO11Ncnn yolo11ncnn = new YOLO11Ncnn();
     private int facing = 0;
+    private boolean isRecording = false;
 
     private Spinner spinnerTask;
     private Spinner spinnerModel;
@@ -77,6 +81,36 @@ public class MainActivity extends Activity implements SurfaceHolder.Callback
             }
         });
 
+        final Button buttonRecord = (Button) findViewById(R.id.buttonRecord);
+        buttonRecord.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View arg0) {
+                if (!isRecording) {
+                    // 检查录音权限
+                    if (ContextCompat.checkSelfPermission(getApplicationContext(), Manifest.permission.RECORD_AUDIO) == PackageManager.PERMISSION_DENIED) {
+                        ActivityCompat.requestPermissions(MainActivity.this, new String[] {Manifest.permission.RECORD_AUDIO}, REQUEST_RECORD_AUDIO);
+                        return;
+                    }
+                    
+                    // 生成文件名
+                    String timestamp = String.valueOf(System.currentTimeMillis());
+                    String filepath = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MOVIES).getAbsolutePath() + "/yolo11_record_" + timestamp + ".mp4";
+                    
+                    if (yolo11ncnn.startRecording(filepath)) {
+                        isRecording = true;
+                        buttonRecord.setText("停止录制");
+                        Toast.makeText(MainActivity.this, "开始录制", Toast.LENGTH_SHORT).show();
+                    }
+                } else {
+                    if (yolo11ncnn.stopRecording()) {
+                        isRecording = false;
+                        buttonRecord.setText("开始录制");
+                        Toast.makeText(MainActivity.this, "录制已停止", Toast.LENGTH_SHORT).show();
+                    }
+                }
+            }
+        });
+
         spinnerTask = (Spinner) findViewById(R.id.spinnerTask);
         spinnerTask.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
             @Override

@@ -23,6 +23,9 @@ public class YOLO11Ncnn
     public native boolean openCamera(int facing);
     public native boolean closeCamera();
     public native boolean setOutputWindow(Surface surface);
+    public native boolean startRecording(String filepath);
+    public native boolean stopRecording();
+    public native boolean isRecording();
 
     static {
         System.loadLibrary("yolo11ncnn");

@@ -10,4 +10,4 @@ find_package(ncnn REQUIRED)
 
 add_library(yolo11ncnn SHARED yolo11ncnn.cpp yolo11.cpp yolo11_det.cpp yolo11_seg.cpp yolo11_pose.cpp yolo11_cls.cpp yolo11_obb.cpp ndkcamera.cpp)
 
-target_link_libraries(yolo11ncnn ncnn ${OpenCV_LIBS} camera2ndk mediandk)
+target_link_libraries(yolo11ncnn ncnn ${OpenCV_LIBS} camera2ndk mediandk)
\ No newline at end of file

@@ -15,10 +15,20 @@
 #include "ndkcamera.h"
 
 #include <string>
+#include <thread>
+#include <queue>
+#include <mutex>
 
 #include <android/log.h>
+#include <media/NdkMediaCodec.h>
+#include <media/NdkMediaMuxer.h>
+#include <media/NdkMediaFormat.h>
+#include <chrono>
+#include <unistd.h>
+#include <fcntl.h>
 
 #include <opencv2/core/core.hpp>
+#include <sys/time.h>
 
 #include "mat.h"
 
@@ -434,10 +444,25 @@ NdkCameraWindow::NdkCameraWindow() : NdkCamera()
     sensor_manager = ASensorManager_getInstance();
 
     accelerometer_sensor = ASensorManager_getDefaultSensor(sensor_manager, ASENSOR_TYPE_ACCELEROMETER);
+
+    // recording
+    recording_active = false;
+    recording_thread = nullptr;
+    video_encoder = nullptr;
+    audio_encoder = nullptr;
+    media_muxer = nullptr;
+    video_track_index = -1;
+    audio_track_index = -1;
+    muxer_started = false;
 }
 
 NdkCameraWindow::~NdkCameraWindow()
 {
+    // stop recording if active
+    if (recording_active) {
+        stopRecording();
+    }
+
     if (accelerometer_sensor)
     {
         ASensorEventQueue_disableSensor(sensor_event_queue, accelerometer_sensor);
@@ -769,3 +794,422 @@ void NdkCameraWindow::on_image(const unsigned char* nv21, int nv21_width, int nv
 
     ANativeWindow_unlockAndPost(win);
 }
+
+// Recording functions implementation
+bool NdkCameraWindow::startRecording(const char* filepath) {
+    std::lock_guard<std::mutex> lock(recording_mutex);
+    
+    if (recording_active) {
+        __android_log_print(ANDROID_LOG_ERROR, "NdkCamera", "Recording already active");
+        return false;
+    }
+    
+    // 保存文件路径
+    recording_filepath = filepath;
+    
+    // 创建MediaMuxer - 使用文件描述符
+    int fd = ::open(recording_filepath.c_str(), O_CREAT | O_RDWR | O_TRUNC, 0644);
+    if (fd < 0) {
+        __android_log_print(ANDROID_LOG_ERROR, "NdkCamera", "Failed to open file: %s", recording_filepath.c_str());
+        return false;
+    }
+    
+    media_muxer = AMediaMuxer_new(fd, AMEDIAMUXER_OUTPUT_FORMAT_MPEG_4);
+    if (!media_muxer) {
+        __android_log_print(ANDROID_LOG_ERROR, "NdkCamera", "Failed to create media muxer");
+        ::close(fd);
+        return false;
+    }
+    
+    // 初始化编码器
+    if (!setup_video_encoder(640, 480, 30)) {
+        __android_log_print(ANDROID_LOG_ERROR, "NdkCamera", "Failed to setup video encoder");
+        AMediaMuxer_delete(media_muxer);
+        media_muxer = nullptr;
+        ::close(fd);
+        return false;
+    }
+    
+    if (!setup_audio_encoder()) {
+        __android_log_print(ANDROID_LOG_ERROR, "NdkCamera", "Failed to setup audio encoder");
+        AMediaCodec_delete(video_encoder);
+        video_encoder = nullptr;
+        AMediaMuxer_delete(media_muxer);
+        media_muxer = nullptr;
+        ::close(fd);
+        return false;
+    }
+    
+    recording_active = true;
+    video_track_index = -1;
+    audio_track_index = -1;
+    muxer_started = false;
+    
+    // 清空帧队列
+    while (!video_frame_queue.empty()) {
+        video_frame_queue.pop();
+    }
+    
+    // 创建录制线程
+    recording_thread = new std::thread(&NdkCameraWindow::recording_worker, this);
+    
+    __android_log_print(ANDROID_LOG_INFO, "NdkCamera", "Recording started: %s", filepath);
+    return true;
+}
+
+bool NdkCameraWindow::stopRecording() {
+    {
+        std::lock_guard<std::mutex> lock(recording_mutex);
+        if (!recording_active) {
+            __android_log_print(ANDROID_LOG_WARN, "NdkCamera", "Recording not active");
+            return false;
+        }
+        recording_active = false;
+        __android_log_print(ANDROID_LOG_INFO, "NdkCamera", "Recording flag set to false");
+    }
+    
+    // 等待录制线程结束
+    if (recording_thread && recording_thread->joinable()) {
+        __android_log_print(ANDROID_LOG_INFO, "NdkCamera", "Waiting for recording thread to finish...");
+        recording_thread->join();
+        delete recording_thread;
+        recording_thread = nullptr;
+        __android_log_print(ANDROID_LOG_INFO, "NdkCamera", "Recording thread finished");
+    }
+    
+    // 清理资源
+    if (media_muxer) {
+        __android_log_print(ANDROID_LOG_INFO, "NdkCamera", "Stopping media muxer");
+        if (muxer_started) {
+            AMediaMuxer_stop(media_muxer);
+        }
+        AMediaMuxer_delete(media_muxer);
+        media_muxer = nullptr;
+    }
+    
+    if (video_encoder) {
+        __android_log_print(ANDROID_LOG_INFO, "NdkCamera", "Stopping video encoder");
+        AMediaCodec_stop(video_encoder);
+        AMediaCodec_delete(video_encoder);
+        video_encoder = nullptr;
+    }
+    
+    if (audio_encoder) {
+        __android_log_print(ANDROID_LOG_INFO, "NdkCamera", "Stopping audio encoder");
+        AMediaCodec_stop(audio_encoder);
+        AMediaCodec_delete(audio_encoder);
+        audio_encoder = nullptr;
+    }
+    
+    // 清空帧队列
+    {
+        std::lock_guard<std::mutex> lock(recording_mutex);
+        while (!video_frame_queue.empty()) {
+            video_frame_queue.pop();
+        }
+    }
+    
+    __android_log_print(ANDROID_LOG_INFO, "NdkCamera", "Recording stopped successfully");
+    return true;
+}
+
+bool NdkCameraWindow::isRecording() const {
+    std::lock_guard<std::mutex> lock(const_cast<std::mutex&>(recording_mutex));
+    return recording_active;
+}
+
+void NdkCameraWindow::recording_worker() {
+    __android_log_print(ANDROID_LOG_INFO, "NdkCamera", "Recording worker started");
+    
+    int64_t start_time = get_current_timestamp();
+    int frame_count = 0;
+    
+    // 录制工作线程
+    while (true) {
+        {
+            std::lock_guard<std::mutex> lock(recording_mutex);
+            if (!recording_active) {
+                break;
+            }
+        }
+        
+        // 处理视频帧队列
+        std::vector<uint8_t> frame;
+        bool has_frame = false;
+        {
+            std::lock_guard<std::mutex> lock(recording_mutex);
+            if (!video_frame_queue.empty()) {
+                frame = video_frame_queue.front();
+                video_frame_queue.pop();
+                has_frame = true;
+                frame_count++;
+            }
+        }
+        
+        if (has_frame && video_encoder) {
+            // 编码视频帧
+            encode_video_frame_data(frame.data(), frame.size());
+        }
+        
+        // 处理编码器输出
+        process_encoder_output();
+        
+        // 记录录制时长
+        int64_t current_time = get_current_timestamp();
+        int64_t elapsed_seconds = (current_time - start_time) / 1000000;
+        
+        // 每5秒记录一次状态
+        if (elapsed_seconds > 0 && elapsed_seconds % 5 == 0) {
+            __android_log_print(ANDROID_LOG_INFO, "NdkCamera", 
+                              "Recording: %ld seconds, %d frames processed", 
+                              elapsed_seconds, frame_count);
+        }
+        
+        // 短暂休眠避免过度占用CPU
+        usleep(10000); // 10ms
+    }
+    
+    __android_log_print(ANDROID_LOG_INFO, "NdkCamera", "Recording worker stopping");
+    
+    // 录制结束时，处理剩余的编码器输出
+    if (video_encoder) {
+        process_encoder_output_final();
+    }
+    
+    __android_log_print(ANDROID_LOG_INFO, "NdkCamera", "Recording worker finished, total frames: %d", frame_count);
+}
+
+bool NdkCameraWindow::setup_video_encoder(int width, int height, int fps) {
+    // 创建视频编码器
+    const char* mime_type = "video/avc";
+    video_encoder = AMediaCodec_createEncoderByType(mime_type);
+    if (!video_encoder) {
+        __android_log_print(ANDROID_LOG_ERROR, "NdkCamera", "Failed to create video encoder");
+        return false;
+    }
+    
+    // 配置视频格式
+    AMediaFormat* format = AMediaFormat_new();
+    AMediaFormat_setString(format, AMEDIAFORMAT_KEY_MIME, mime_type);
+    AMediaFormat_setInt32(format, AMEDIAFORMAT_KEY_WIDTH, width);
+    AMediaFormat_setInt32(format, AMEDIAFORMAT_KEY_HEIGHT, height);
+    AMediaFormat_setInt32(format, AMEDIAFORMAT_KEY_FRAME_RATE, fps);
+    AMediaFormat_setInt32(format, AMEDIAFORMAT_KEY_I_FRAME_INTERVAL, 1);
+    AMediaFormat_setInt32(format, AMEDIAFORMAT_KEY_BIT_RATE, 2000000);
+    AMediaFormat_setInt32(format, AMEDIAFORMAT_KEY_COLOR_FORMAT, 
+                         21); // COLOR_FormatYUV420SemiPlanar
+    
+    // 配置编码器
+    media_status_t status = AMediaCodec_configure(video_encoder, format, 
+                                                nullptr, nullptr, 
+                                                AMEDIACODEC_CONFIGURE_FLAG_ENCODE);
+    AMediaFormat_delete(format);
+    
+    if (status != AMEDIA_OK) {
+        __android_log_print(ANDROID_LOG_ERROR, "NdkCamera", "Failed to configure video encoder: %d", status);
+        AMediaCodec_delete(video_encoder);
+        video_encoder = nullptr;
+        return false;
+    }
+    
+    // 启动编码器
+    status = AMediaCodec_start(video_encoder);
+    if (status != AMEDIA_OK) {
+        __android_log_print(ANDROID_LOG_ERROR, "NdkCamera", "Failed to start video encoder: %d", status);
+        AMediaCodec_delete(video_encoder);
+        video_encoder = nullptr;
+        return false;
+    }
+    
+    __android_log_print(ANDROID_LOG_INFO, "NdkCamera", "Video encoder setup: %dx%d %dfps", width, height, fps);
+    return true;
+}
+
+bool NdkCameraWindow::setup_audio_encoder() {
+    // 创建音频编码器
+    const char* mime_type = "audio/mp4a-latm";
+    audio_encoder = AMediaCodec_createEncoderByType(mime_type);
+    if (!audio_encoder) {
+        __android_log_print(ANDROID_LOG_ERROR, "NdkCamera", "Failed to create audio encoder");
+        return false;
+    }
+    
+    // 配置音频格式
+    AMediaFormat* format = AMediaFormat_new();
+    AMediaFormat_setString(format, AMEDIAFORMAT_KEY_MIME, mime_type);
+    AMediaFormat_setInt32(format, AMEDIAFORMAT_KEY_SAMPLE_RATE, 44100);
+    AMediaFormat_setInt32(format, AMEDIAFORMAT_KEY_CHANNEL_COUNT, 1);
+    AMediaFormat_setInt32(format, AMEDIAFORMAT_KEY_BIT_RATE, 128000);
+    AMediaFormat_setInt32(format, AMEDIAFORMAT_KEY_AAC_PROFILE, 2); // AAC LC
+    
+    // 配置编码器
+    media_status_t status = AMediaCodec_configure(audio_encoder, format, 
+                                                nullptr, nullptr, 
+                                                AMEDIACODEC_CONFIGURE_FLAG_ENCODE);
+    AMediaFormat_delete(format);
+    
+    if (status != AMEDIA_OK) {
+        __android_log_print(ANDROID_LOG_ERROR, "NdkCamera", "Failed to configure audio encoder: %d", status);
+        AMediaCodec_delete(audio_encoder);
+        audio_encoder = nullptr;
+        return false;
+    }
+    
+    // 启动编码器
+    status = AMediaCodec_start(audio_encoder);
+    if (status != AMEDIA_OK) {
+        __android_log_print(ANDROID_LOG_ERROR, "NdkCamera", "Failed to start audio encoder: %d", status);
+        AMediaCodec_delete(audio_encoder);
+        audio_encoder = nullptr;
+        return false;
+    }
+    
+    __android_log_print(ANDROID_LOG_INFO, "NdkCamera", "Audio encoder setup");
+    return true;
+}
+
+void NdkCameraWindow::encode_video_frame(const unsigned char* nv21_data, int width, int height, int64_t timestamp_us) {
+    if (!video_encoder) {
+        return;
+    }
+    
+    // 检查录制状态
+    {
+        std::lock_guard<std::mutex> lock(recording_mutex);
+        if (!recording_active) {
+            return;
+        }
+    }
+    
+    // 限制队列大小，避免内存溢出
+    const size_t max_queue_size = 30; // 最多缓存30帧
+    
+    std::lock_guard<std::mutex> lock(recording_mutex);
+    if (video_frame_queue.size() >= max_queue_size) {
+        // 队列已满，丢弃最旧的一帧
+        video_frame_queue.pop();
+        __android_log_print(ANDROID_LOG_WARN, "NdkCamera", "Video frame queue full, dropping frame");
+    }
+    
+    // 将视频帧添加到队列供录制线程处理
+    std::vector<uint8_t> frame_data(nv21_data, nv21_data + width * height * 3 / 2);
+    video_frame_queue.push(std::move(frame_data));
+}
+
+void NdkCameraWindow::encode_video_frame_data(const uint8_t* data, size_t size) {
+    if (!video_encoder || !recording_active) {
+        return;
+    }
+    
+    // 获取输入缓冲区
+    ssize_t input_index = AMediaCodec_dequeueInputBuffer(video_encoder, 10000);
+    if (input_index >= 0) {
+        size_t buffer_size;
+        uint8_t* buffer = AMediaCodec_getInputBuffer(video_encoder, input_index, &buffer_size);
+        
+        if (buffer && buffer_size >= size) {
+            // 复制数据到缓冲区
+            memcpy(buffer, data, size);
+            
+            // 提交缓冲区给编码器
+            media_status_t status = AMediaCodec_queueInputBuffer(video_encoder, input_index, 
+                                                               0, size, 
+                                                               get_current_timestamp(), 0);
+            if (status != AMEDIA_OK) {
+                __android_log_print(ANDROID_LOG_ERROR, "NdkCamera", "Failed to queue input buffer: %d", status);
+            } else {
+                __android_log_print(ANDROID_LOG_DEBUG, "NdkCamera", "Queued input buffer: index=%zd, size=%zu", 
+                                  input_index, size);
+            }
+        } else {
+            __android_log_print(ANDROID_LOG_WARN, "NdkCamera", "Input buffer too small: need=%zu, have=%zu", 
+                              size, buffer_size);
+        }
+    } else if (input_index == AMEDIACODEC_INFO_TRY_AGAIN_LATER) {
+        __android_log_print(ANDROID_LOG_DEBUG, "NdkCamera", "No input buffer available, try again later");
+    } else {
+        __android_log_print(ANDROID_LOG_ERROR, "NdkCamera", "Failed to get input buffer: %zd", input_index);
+    }
+}
+
+void NdkCameraWindow::process_encoder_output() {
+    if (!video_encoder || !recording_active) {
+        return;
+    }
+    
+    // 处理输出缓冲区
+    AMediaCodecBufferInfo info;
+    ssize_t output_index = AMediaCodec_dequeueOutputBuffer(video_encoder, &info, 10000); // 10ms超时
+    while (output_index >= 0) {
+        if (info.flags & AMEDIACODEC_BUFFER_FLAG_CODEC_CONFIG) {
+            // 配置数据
+            if (!muxer_started && media_muxer) {
+                // 添加视频轨道
+                AMediaFormat* format = AMediaCodec_getOutputFormat(video_encoder);
+                if (format) {
+                    video_track_index = AMediaMuxer_addTrack(media_muxer, format);
+                    AMediaFormat_delete(format);
+                    
+                    __android_log_print(ANDROID_LOG_INFO, "NdkCamera", "Video track added: %d", video_track_index);
+                    
+                    // 如果音频轨道也已准备好，启动混合器
+                    if (audio_track_index >= 0 || !audio_encoder) {
+                        media_status_t status = AMediaMuxer_start(media_muxer);
+                        if (status == AMEDIA_OK) {
+                            muxer_started = true;
+                            __android_log_print(ANDROID_LOG_INFO, "NdkCamera", "MediaMuxer started");
+                        } else {
+                            __android_log_print(ANDROID_LOG_ERROR, "NdkCamera", "Failed to start MediaMuxer: %d", status);
+                        }
+                    }
+                }
+            }
+        } else if (info.size > 0) {
+            // 编码数据
+            if (muxer_started && media_muxer) {
+                size_t buffer_size;
+                uint8_t* buffer = AMediaCodec_getOutputBuffer(video_encoder, output_index, &buffer_size);
+                if (buffer) {
+                    media_status_t status = AMediaMuxer_writeSampleData(media_muxer, video_track_index, buffer, &info);
+                    if (status != AMEDIA_OK) {
+                        __android_log_print(ANDROID_LOG_ERROR, "NdkCamera", "Failed to write sample data: %d", status);
+                    } else {
+                        __android_log_print(ANDROID_LOG_DEBUG, "NdkCamera", "Wrote sample data: size=%d, pts=%ld", 
+                                          info.size, info.presentationTimeUs);
+                    }
+                }
+            }
+        }
+        
+        AMediaCodec_releaseOutputBuffer(video_encoder, output_index, false);
+        output_index = AMediaCodec_dequeueOutputBuffer(video_encoder, &info, 10000);
+    }
+}
+
+void NdkCameraWindow::process_encoder_output_final() {
+    if (!video_encoder) {
+        return;
+    }
+    
+    // 处理所有剩余的编码器输出
+    AMediaCodecBufferInfo info;
+    ssize_t output_index = AMediaCodec_dequeueOutputBuffer(video_encoder, &info, 1000000); // 1秒超时
+    while (output_index >= 0) {
+        if (info.size > 0 && muxer_started && media_muxer) {
+            size_t buffer_size;
+            uint8_t* buffer = AMediaCodec_getOutputBuffer(video_encoder, output_index, &buffer_size);
+            if (buffer) {
+                AMediaMuxer_writeSampleData(media_muxer, video_track_index, buffer, &info);
+            }
+        }
+        
+        AMediaCodec_releaseOutputBuffer(video_encoder, output_index, false);
+        output_index = AMediaCodec_dequeueOutputBuffer(video_encoder, &info, 1000000);
+    }
+}
+
+int64_t NdkCameraWindow::get_current_timestamp() {
+    struct timeval tv;
+    gettimeofday(&tv, nullptr);
+    return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
+}

@@ -22,6 +22,12 @@
 #include <camera/NdkCameraManager.h>
 #include <camera/NdkCameraMetadata.h>
 #include <media/NdkImageReader.h>
+#include <media/NdkMediaCodec.h>
+#include <media/NdkMediaMuxer.h>
+#include <media/NdkMediaFormat.h>
+#include <thread>
+#include <mutex>
+#include <queue>
 
 #include <opencv2/core/core.hpp>
 
@@ -67,6 +73,11 @@ public:
 
     virtual void on_image(const unsigned char* nv21, int nv21_width, int nv21_height) const;
 
+    // 录制相关方法
+    bool startRecording(const char* filepath);
+    bool stopRecording();
+    bool isRecording() const;
+
 public:
     mutable int accelerometer_orientation;
 
@@ -75,6 +86,30 @@ private:
     mutable ASensorEventQueue* sensor_event_queue;
     const ASensor* accelerometer_sensor;
     ANativeWindow* win;
+    
+    // 录制相关成员变量
+    AMediaCodec* video_encoder;
+    AMediaCodec* audio_encoder;
+    AMediaMuxer* media_muxer;
+    std::thread* recording_thread;
+    std::mutex recording_mutex;
+    std::queue<std::vector<uint8_t>> video_frame_queue;
+    bool recording_active;
+    int video_track_index;
+    int audio_track_index;
+    bool muxer_started;
+    
+    void recording_worker();
+    bool setup_video_encoder(int width, int height, int fps);
+    bool setup_audio_encoder();
+    void encode_video_frame(const unsigned char* nv21_data, int width, int height, int64_t timestamp_us);
+    void encode_video_frame_data(const uint8_t* data, size_t size);
+    int64_t get_current_timestamp();
+    void process_encoder_output();
+    void process_encoder_output_final();
+    
+private:
+    std::string recording_filepath;
 };
 
 #endif // NDKCAMERA_H

@@ -22,6 +22,9 @@
 
 #include <string>
 #include <vector>
+#include <thread>
+#include <mutex>
+#include <queue>
 
 #include <platform.h>
 #include <benchmark.h>
@@ -33,6 +36,10 @@
 #include <opencv2/core/core.hpp>
 #include <opencv2/imgproc/imgproc.hpp>
 
+#include <media/NdkMediaCodec.h>
+#include <media/NdkMediaMuxer.h>
+#include <media/NdkMediaFormat.h>
+
 #if __ARM_NEON
 #include <arm_neon.h>
 #endif // __ARM_NEON
@@ -298,4 +305,39 @@ JNIEXPORT jboolean JNICALL Java_com_tencent_yolo11ncnn_YOLO11Ncnn_setOutputWindo
     return JNI_TRUE;
 }
 
+// public native boolean startRecording(String filepath);
+JNIEXPORT jboolean JNICALL Java_com_tencent_yolo11ncnn_YOLO11Ncnn_startRecording(JNIEnv* env, jobject thiz, jstring filepath)
+{
+    const char* filepath_str = env->GetStringUTFChars(filepath, nullptr);
+    if (!filepath_str) {
+        return JNI_FALSE;
+    }
+
+    __android_log_print(ANDROID_LOG_DEBUG, "ncnn", "startRecording %s", filepath_str);
+
+    bool result = g_camera->startRecording(filepath_str);
+
+    env->ReleaseStringUTFChars(filepath, filepath_str);
+
+    return result ? JNI_TRUE : JNI_FALSE;
+}
+
+// public native boolean stopRecording();
+JNIEXPORT jboolean JNICALL Java_com_tencent_yolo11ncnn_YOLO11Ncnn_stopRecording(JNIEnv* env, jobject thiz)
+{
+    __android_log_print(ANDROID_LOG_DEBUG, "ncnn", "stopRecording");
+
+    bool result = g_camera->stopRecording();
+
+    return result ? JNI_TRUE : JNI_FALSE;
+}
+
+// public native boolean isRecording();
+JNIEXPORT jboolean JNICALL Java_com_tencent_yolo11ncnn_YOLO11Ncnn_isRecording(JNIEnv* env, jobject thiz)
+{
+    bool result = g_camera->isRecording();
+
+    return result ? JNI_TRUE : JNI_FALSE;
+}
+
 }

@@ -15,6 +15,12 @@
         android:layout_height="wrap_content"
         android:text="切换摄像头" />
 
+    <Button
+        android:id="@+id/buttonRecord"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="开始录制" />
+
     </LinearLayout>
 
     <LinearLayout