diff --git a/server/Process.h b/server/Process.h
index cd0b2917..db752232 100644
--- a/server/Process.h
+++ b/server/Process.h
@@ -29,10 +29,12 @@ public:
     bool wait(bool block = true);
     int exit_code();
 private:
+    int _exit_code = 0;
     pid_t _pid = -1;
     void *_handle = nullptr;
-    void* _process_stack = nullptr;
-    int _exit_code = 0;
+#if (defined(__linux) || defined(__linux__))
+    void *_process_stack = nullptr;
+#endif
 };
 
 
diff --git a/src/Codec/Transcode.cpp b/src/Codec/Transcode.cpp
index 989dcda7..18d0cfae 100644
--- a/src/Codec/Transcode.cpp
+++ b/src/Codec/Transcode.cpp
@@ -386,7 +386,7 @@ FFmpegDecoder::FFmpegDecoder(const Track::Ptr &track, int thread_num) {
         if (thread_num <= 0) {
             av_dict_set(&dict, "threads", "auto", 0);
         } else {
-            av_dict_set(&dict, "threads", to_string(MIN(thread_num, thread::hardware_concurrency())).data(), 0);
+            av_dict_set(&dict, "threads", to_string(MIN((unsigned int)thread_num, thread::hardware_concurrency())).data(), 0);
         }
         av_dict_set(&dict, "zerolatency", "1", 0);
         av_dict_set(&dict, "strict", "-2", 0);
diff --git a/src/Extension/AAC.cpp b/src/Extension/AAC.cpp
index 1d923271..ea57d643 100644
--- a/src/Extension/AAC.cpp
+++ b/src/Extension/AAC.cpp
@@ -132,7 +132,8 @@ string makeAacConfig(const uint8_t *hex, size_t length){
     audioSpecificConfig[1] = (sampling_frequency_index << 7) | (channel_configuration << 3);
     return string((char *)audioSpecificConfig,2);
 #else
-    struct mpeg4_aac_t aac = {0};
+    struct mpeg4_aac_t aac;
+    memset(&aac, 0, sizeof(aac));
     if (mpeg4_aac_adts_load(hex, length, &aac) > 0) {
         char buf[32] = {0};
         int len = mpeg4_aac_audio_specific_config_save(&aac, (uint8_t *) buf, sizeof(buf));
@@ -153,7 +154,8 @@ int dumpAacConfig(const string &config, size_t length, uint8_t *out, size_t out_
     dumpAdtsHeader(header, out);
     return ADTS_HEADER_LEN;
 #else
-    struct mpeg4_aac_t aac = {0};
+    struct mpeg4_aac_t aac;
+    memset(&aac, 0, sizeof(aac));
     int ret = mpeg4_aac_audio_specific_config_load((uint8_t *) config.data(), config.size(), &aac);
     if (ret > 0) {
         ret = mpeg4_aac_adts_save(&aac, length, out, out_size);
@@ -174,7 +176,8 @@ bool parseAacConfig(const string &config, int &samplerate, int &channels){
     channels = header.channel_configuration;
     return true;
 #else
-    struct mpeg4_aac_t aac = {0};
+    struct mpeg4_aac_t aac;
+    memset(&aac, 0, sizeof(aac));
     int ret = mpeg4_aac_audio_specific_config_load((uint8_t *) config.data(), config.size(), &aac);
     if (ret > 0) {
         samplerate = aac.sampling_frequency;
@@ -284,7 +287,7 @@ bool AACTrack::inputFrame(const Frame::Ptr &frame) {
         if (frame_len < ADTS_HEADER_LEN) {
             break;
         }
-        if (frame_len == frame->size()) {
+        if (frame_len == (int)frame->size()) {
             return inputFrame_l(frame);
         }
         auto sub_frame = std::make_shared<FrameTSInternal<FrameFromPtr> >(frame, (char *) ptr, frame_len, ADTS_HEADER_LEN,dts,pts);
diff --git a/src/Extension/H265Rtmp.cpp b/src/Extension/H265Rtmp.cpp
index 54f9aeb5..19e450e8 100644
--- a/src/Extension/H265Rtmp.cpp
+++ b/src/Extension/H265Rtmp.cpp
@@ -49,7 +49,8 @@ static bool getH265ConfigFrame(const RtmpPacket &thiz,string &frame) {
     auto extra = thiz.buffer.data() + 5;
     auto bytes = thiz.buffer.size() - 5;
 
-    struct mpeg4_hevc_t hevc = {0};
+    struct mpeg4_hevc_t hevc;
+    memset(&hevc, 0, sizeof(hevc));
     if (mpeg4_hevc_decoder_configuration_record_load((uint8_t *) extra, bytes, &hevc) > 0) {
         uint8_t *config = new uint8_t[bytes * 2];
         int size = mpeg4_hevc_to_nalu(&hevc, config, bytes * 2);
@@ -207,7 +208,8 @@ void H265RtmpEncoder::makeVideoConfigPkt() {
     //cts
     rtmpPkt->buffer.append("\x0\x0\x0", 3);
 
-    struct mpeg4_hevc_t hevc = {0};
+    struct mpeg4_hevc_t hevc;
+    memset(&hevc, 0, sizeof(hevc));
     string vps_sps_pps = string("\x00\x00\x00\x01", 4) + _vps +
                          string("\x00\x00\x00\x01", 4) + _sps +
                          string("\x00\x00\x00\x01", 4) + _pps;
diff --git a/src/Http/HttpCookieManager.cpp b/src/Http/HttpCookieManager.cpp
index 2c514451..2ce0f188 100644
--- a/src/Http/HttpCookieManager.cpp
+++ b/src/Http/HttpCookieManager.cpp
@@ -67,7 +67,7 @@ void HttpServerCookie::setAttach(std::shared_ptr<void> attach) {
 
 string HttpServerCookie::cookieExpireTime() const {
     char buf[64];
-    time_t tt = time(NULL) + _max_elapsed;
+    time_t tt = time(nullptr) + _max_elapsed;
     strftime(buf, sizeof buf, "%a, %b %d %Y %H:%M:%S GMT", gmtime(&tt));
     return buf;
 }
@@ -105,8 +105,8 @@ void HttpCookieManager::onManager() {
         }
 
         if (it_name->second.empty()) {
-            //该类型下没有任何cooki记录,移除之
-            DebugL << "该path下没有任何cooki记录:" << it_name->first;
+            //该类型下没有任何cookie记录,移除之
+            DebugL << "该path下没有任何cookie记录:" << it_name->first;
             it_name = _map_cookie.erase(it_name);
             continue;
         }
@@ -117,7 +117,7 @@ void HttpCookieManager::onManager() {
 HttpServerCookie::Ptr HttpCookieManager::addCookie(const string &cookie_name, const string &uid_in,
                                                    uint64_t max_elapsed, std::shared_ptr<void> attach, int max_client) {
     lock_guard<recursive_mutex> lck(_mtx_cookie);
-    auto cookie = _geneator.obtain();
+    auto cookie = _generator.obtain();
     auto uid = uid_in.empty() ? cookie : uid_in;
     auto oldCookie = getOldestCookie(cookie_name, uid, max_client);
     if (!oldCookie.empty()) {
@@ -159,13 +159,13 @@ HttpServerCookie::Ptr HttpCookieManager::getCookie(const string &cookie_name, co
         return nullptr;
     }
     auto cookie = FindField(it->second.data(), (cookie_name + "=").data(), ";");
-    if (!cookie.size()) {
+    if (cookie.empty()) {
         cookie = FindField(it->second.data(), (cookie_name + "=").data(), nullptr);
     }
     if (cookie.empty()) {
         return nullptr;
     }
-    return HttpCookieManager::Instance().getCookie(cookie_name, cookie);
+    return getCookie(cookie_name, cookie);
 }
 
 HttpServerCookie::Ptr HttpCookieManager::getCookieByUid(const string &cookie_name, const string &uid) {
@@ -205,7 +205,7 @@ void HttpCookieManager::onAddCookie(const string &cookie_name, const string &uid
 void HttpCookieManager::onDelCookie(const string &cookie_name, const string &uid, const string &cookie) {
     lock_guard<recursive_mutex> lck(_mtx_cookie);
     //回收随机字符串
-    _geneator.release(cookie);
+    _generator.release(cookie);
 
     auto it_name = _map_uid_to_cookie.find(cookie_name);
     if (it_name == _map_uid_to_cookie.end()) {
@@ -227,14 +227,14 @@ void HttpCookieManager::onDelCookie(const string &cookie_name, const string &uid
         //移除该用户名下的某个cookie，这个设备cookie将失效
         it_uid->second.erase(it_cookie);
 
-        if (it_uid->second.size() != 0) {
+        if (!it_uid->second.empty()) {
             break;
         }
 
         //该用户名下没有任何设备在线，移除之
         it_name->second.erase(it_uid);
 
-        if (it_name->second.size() != 0) {
+        if (!it_name->second.empty()) {
             break;
         }
         //该类型下未有任何用户在线，移除之
@@ -255,7 +255,7 @@ string HttpCookieManager::getOldestCookie(const string &cookie_name, const strin
         //该用户从未登录过
         return "";
     }
-    if (it_uid->second.size() < MAX(1, max_client)) {
+    if ((int)it_uid->second.size() < MAX(1, max_client)) {
         //同一名用户下，客户端个数还没达到限制个数
         return "";
     }
@@ -263,8 +263,8 @@ string HttpCookieManager::getOldestCookie(const string &cookie_name, const strin
     return it_uid->second.begin()->second;
 }
 
-/////////////////////////////////RandStrGeneator////////////////////////////////////
-string RandStrGeneator::obtain() {
+/////////////////////////////////RandStrGenerator////////////////////////////////////
+string RandStrGenerator::obtain() {
     //获取唯一的防膨胀的随机字符串
     while (true) {
         auto str = obtain_l();
@@ -276,12 +276,12 @@ string RandStrGeneator::obtain() {
     }
 }
 
-void RandStrGeneator::release(const string &str) {
+void RandStrGenerator::release(const string &str) {
     //从防膨胀库中移除
     _obtained.erase(str);
 }
 
-string RandStrGeneator::obtain_l() {
+string RandStrGenerator::obtain_l() {
     // 12个伪随机字节 + 4个递增的整形字节，然后md5即为随机字符串
     auto str = makeRandStr(12, false);
     str.append((char *)&_index, sizeof(_index));
diff --git a/src/Http/HttpCookieManager.h b/src/Http/HttpCookieManager.h
index ccdc0fd0..f1dcfa68 100644
--- a/src/Http/HttpCookieManager.h
+++ b/src/Http/HttpCookieManager.h
@@ -111,10 +111,10 @@ private:
 /**
  * cookie随机字符串生成器
  */
-class RandStrGeneator {
+class RandStrGenerator {
 public:
-    RandStrGeneator() = default;
-    ~RandStrGeneator() = default;
+    RandStrGenerator() = default;
+    ~RandStrGenerator() = default;
 
     /**
      * 获取不碰撞的随机字符串
@@ -244,7 +244,7 @@ private:
         _map_uid_to_cookie;
     std::recursive_mutex _mtx_cookie;
     toolkit::Timer::Ptr _timer;
-    RandStrGeneator _geneator;
+    RandStrGenerator _generator;
 };
 
 } // namespace mediakit
diff --git a/src/Record/MP4Demuxer.cpp b/src/Record/MP4Demuxer.cpp
index 4ea3fc83..a1c657fd 100644
--- a/src/Record/MP4Demuxer.cpp
+++ b/src/Record/MP4Demuxer.cpp
@@ -96,7 +96,8 @@ void MP4Demuxer::onVideoTrack(uint32_t track, uint8_t object, int width, int hei
             auto video = std::make_shared<H264Track>();
             _track_to_codec.emplace(track,video);
 
-            struct mpeg4_avc_t avc = {0};
+            struct mpeg4_avc_t avc;
+            memset(&avc, 0, sizeof(avc));
             if (mpeg4_avc_decoder_configuration_record_load((uint8_t *) extra, bytes, &avc) > 0) {
                 uint8_t config[1024 * 10] = {0};
                 int size = mpeg4_avc_to_nalu(&avc, config, sizeof(config));
@@ -110,7 +111,8 @@ void MP4Demuxer::onVideoTrack(uint32_t track, uint8_t object, int width, int hei
             auto video = std::make_shared<H265Track>();
             _track_to_codec.emplace(track,video);
 
-            struct mpeg4_hevc_t hevc = {0};
+            struct mpeg4_hevc_t hevc;
+            memset(&hevc, 0, sizeof(hevc));
             if (mpeg4_hevc_decoder_configuration_record_load((uint8_t *) extra, bytes, &hevc) > 0) {
                 uint8_t config[1024 * 10] = {0};
                 int size = mpeg4_hevc_to_nalu(&hevc, config, sizeof(config));
@@ -160,12 +162,13 @@ int64_t MP4Demuxer::seekTo(int64_t stamp_ms) {
     return stamp_ms;
 }
 
-struct Context{
+struct Context {
+    Context(MP4Demuxer *ptr) : thiz(ptr) {}
     MP4Demuxer *thiz;
-    int flags;
-    int64_t pts;
-    int64_t dts;
-    uint32_t track_id;
+    int flags = 0;
+    int64_t pts = 0;
+    int64_t dts = 0;
+    uint32_t track_id = 0;
     BufferRaw::Ptr buffer;
 };
 
@@ -188,7 +191,7 @@ Frame::Ptr MP4Demuxer::readFrame(bool &keyFrame, bool &eof) {
         return ctx->buffer->data() + DATA_OFFSET;
     };
 
-    Context ctx = {this, 0};
+    Context ctx(this);
     auto ret = mov_reader_read2(_mov_reader.get(), mov_onalloc, &ctx);
     switch (ret) {
         case 0 : {
diff --git a/src/Record/MP4Muxer.cpp b/src/Record/MP4Muxer.cpp
index f9a13fe6..0b4357a6 100644
--- a/src/Record/MP4Muxer.cpp
+++ b/src/Record/MP4Muxer.cpp
@@ -221,7 +221,8 @@ bool MP4MuxerInterface::addTrack(const Track::Ptr &track) {
                 return false;
             }
 
-            struct mpeg4_avc_t avc = {0};
+            struct mpeg4_avc_t avc;
+            memset(&avc, 0, sizeof(avc));
             string sps_pps = string("\x00\x00\x00\x01", 4) + h264_track->getSps() +
                              string("\x00\x00\x00\x01", 4) + h264_track->getPps();
             h264_annexbtomp4(&avc, sps_pps.data(), (int) sps_pps.size(), NULL, 0, NULL, NULL);
@@ -256,7 +257,8 @@ bool MP4MuxerInterface::addTrack(const Track::Ptr &track) {
                 return false;
             }
 
-            struct mpeg4_hevc_t hevc = {0};
+            struct mpeg4_hevc_t hevc;
+            memset(&hevc, 0, sizeof(hevc));
             string vps_sps_pps = string("\x00\x00\x00\x01", 4) + h265_track->getVps() +
                                  string("\x00\x00\x00\x01", 4) + h265_track->getSps() +
                                  string("\x00\x00\x00\x01", 4) + h265_track->getPps();
diff --git a/srt/PacketQueue.cpp b/srt/PacketQueue.cpp
index 9349f050..9dcdf9e5 100644
--- a/srt/PacketQueue.cpp
+++ b/srt/PacketQueue.cpp
@@ -237,12 +237,12 @@ std::string PacketQueue::dump() {
 
 //////////////////// PacketRecvQueue //////////////////////////////////
 
-PacketRecvQueue::PacketRecvQueue(uint32_t max_size, uint32_t init_seq, uint32_t latency,uint32_t flag)
+PacketRecvQueue::PacketRecvQueue(uint32_t max_size, uint32_t init_seq, uint32_t latency, uint32_t flag)
     : _pkt_cap(max_size)
     , _pkt_latency(latency)
     , _pkt_expected_seq(init_seq)
-    , _pkt_buf(max_size)
-    , _srt_flag(flag) {}
+    , _srt_flag(flag)
+    , _pkt_buf(max_size) {}
 
 bool  PacketRecvQueue::TLPKTDrop(){
     return (_srt_flag&HSExtMessage::HS_EXT_MSG_TLPKTDROP) && (_srt_flag &HSExtMessage::HS_EXT_MSG_TSBPDRCV);
diff --git a/srt/PacketSendQueue.cpp b/srt/PacketSendQueue.cpp
index 06beddde..3cd2b8f2 100644
--- a/srt/PacketSendQueue.cpp
+++ b/srt/PacketSendQueue.cpp
@@ -3,9 +3,9 @@
 namespace SRT {
 
 PacketSendQueue::PacketSendQueue(uint32_t max_size, uint32_t latency,uint32_t flag)
-    : _pkt_cap(max_size)
-    , _pkt_latency(latency)
-    , _srt_flag(flag) {}
+    : _srt_flag(flag)
+    , _pkt_cap(max_size)
+    , _pkt_latency(latency) {}
 
 bool PacketSendQueue::drop(uint32_t num) {
     decltype(_pkt_cache.begin()) it;
diff --git a/tests/test_rtp.cpp b/tests/test_rtp.cpp
index 4826c821..441d1563 100644
--- a/tests/test_rtp.cpp
+++ b/tests/test_rtp.cpp
@@ -37,7 +37,8 @@ static bool loadFile(const char *path){
     uint64_t timeStamp_last = 0;
     uint16_t len;
     char rtp[0xFFFF];
-    struct sockaddr_storage addr = {0};
+    struct sockaddr_storage addr;
+    memset(&addr, 0, sizeof(addr));
     addr.ss_family = AF_INET;
     auto sock = Socket::createSocket();
     size_t total_size = 0;