修复由于识别不出关键帧而导致hls不能切片. (#1551)

2.修复由于丢弃sei帧导致ffplay不能正常播放

src/Extension/Frame.cpp

@@ -22,67 +22,6 @@ namespace toolkit {
 
 namespace mediakit{
 
-/**
- * 该对象的功能是把一个不可缓存的帧转换成可缓存的帧
- */
-class FrameCacheAble : public FrameFromPtr {
-public:
-    typedef std::shared_ptr<FrameCacheAble> Ptr;
-
-    FrameCacheAble(const Frame::Ptr &frame){
-        if (frame->cacheAble()) {
-            _frame = frame;
-            _ptr = frame->data();
-        } else {
-            _buffer = FrameImp::create();
-            _buffer->_buffer.assign(frame->data(), frame->size());
-            _ptr = _buffer->data();
-        }
-        _size = frame->size();
-        _dts = frame->dts();
-        _pts = frame->pts();
-        _prefix_size = frame->prefixSize();
-        _codec_id = frame->getCodecId();
-        _key = frame->keyFrame();
-        _config = frame->configFrame();
-        _drop_able = frame->dropAble();
-        _decode_able = frame->decodeAble();
-    }
-
-    ~FrameCacheAble() override = default;
-
-    /**
-     * 可以被缓存
-     */
-    bool cacheAble() const override {
-        return true;
-    }
-
-    bool keyFrame() const override{
-        return _key;
-    }
-
-    bool configFrame() const override{
-        return _config;
-    }
-
-    bool dropAble() const override {
-        return _drop_able;
-    }
-
-    bool decodeAble() const override {
-        return _decode_able;
-    }
-
-private:
-    bool _key;
-    bool _config;
-    bool _drop_able;
-    bool _decode_able;
-    Frame::Ptr _frame;
-    FrameImp::Ptr _buffer;
-};
-
 Frame::Ptr Frame::getCacheAbleFrame(const Frame::Ptr &frame){
     if(frame->cacheAble()){
         return frame;
@@ -241,18 +180,6 @@ bool FrameMerger::inputFrame(const Frame::Ptr &frame, const onOutput &cb, Buffer
         _have_decode_able_frame = false;
     }
 
-    switch (_type) {
-        case h264_prefix:
-        case mp4_nal_size: {
-            if (frame->dropAble()) {
-                //h264头和mp4头模式过滤无效的帧
-                return false;
-            }
-            break;
-        }
-        default: break;
-    }
-
     if (frame->decodeAble()) {
         _have_decode_able_frame = true;
     }

src/Extension/Frame.h

@@ -445,6 +445,67 @@ protected:
 };
 
 /**
+ * 该对象的功能是把一个不可缓存的帧转换成可缓存的帧
+ */
+class FrameCacheAble : public FrameFromPtr {
+public:
+    typedef std::shared_ptr<FrameCacheAble> Ptr;
+
+    FrameCacheAble(const Frame::Ptr &frame, bool force_key_frame = false) {
+        if (frame->cacheAble()) {
+            _frame = frame;
+            _ptr = frame->data();
+        } else {
+            _buffer = FrameImp::create();
+            _buffer->_buffer.assign(frame->data(), frame->size());
+            _ptr = _buffer->data();
+        }
+        _size = frame->size();
+        _dts = frame->dts();
+        _pts = frame->pts();
+        _prefix_size = frame->prefixSize();
+        _codec_id = frame->getCodecId();
+        _key = force_key_frame ? true : frame->keyFrame();
+        _config = frame->configFrame();
+        _drop_able = frame->dropAble();
+        _decode_able = frame->decodeAble();
+    }
+
+    ~FrameCacheAble() override = default;
+
+    /**
+     * 可以被缓存
+     */
+    bool cacheAble() const override {
+        return true;
+    }
+
+    bool keyFrame() const override{
+        return _key;
+    }
+
+    bool configFrame() const override{
+        return _config;
+    }
+
+    bool dropAble() const override {
+        return _drop_able;
+    }
+
+    bool decodeAble() const override {
+        return _decode_able;
+    }
+
+private:
+    bool _key;
+    bool _config;
+    bool _drop_able;
+    bool _decode_able;
+    Frame::Ptr _frame;
+    FrameImp::Ptr _buffer;
+};
+
+/**
  * 该对象可以把Buffer对象转换成可缓存的Frame对象
  */
 template <typename Parent>

src/Extension/H264.cpp

@@ -184,23 +184,22 @@ bool H264Track::inputFrame_l(const Frame::Ptr &frame){
         }
         case H264Frame::NAL_PPS: {
             _pps = string(frame->data() + frame->prefixSize(), frame->size() - frame->prefixSize());
-            break;
-        }
-        case H264Frame::NAL_AUD: {
-            //忽略AUD帧;
-            ret = false;
+            _insert_config_frame = true;
             break;
         }
 
         default:
-            if (frame->keyFrame()) {
+            if (_insert_config_frame && !frame->dropAble()) {
+                if (!frame->keyFrame()) {
+                    const_cast<Frame::Ptr &>(frame) = std::make_shared<FrameCacheAble>(frame, true);
+                }
                 insertConfigFrame(frame);
+                _insert_config_frame = false;
             }
             ret = VideoTrack::inputFrame(frame);
             break;
     }
 
-    _is_idr = type == H264Frame::NAL_IDR;
     if (_width == 0 && ready()) {
         onReady();
     }
@@ -208,10 +207,6 @@ bool H264Track::inputFrame_l(const Frame::Ptr &frame){
 }
 
 void H264Track::insertConfigFrame(const Frame::Ptr &frame){
-    if(_is_idr){
-        return;
-    }
-
     if(!_sps.empty()){
         auto spsFrame = FrameImp::create<H264Frame>();
         spsFrame->_prefix_size = 4;

src/Extension/H264.h

@@ -138,7 +138,7 @@ private:
     void insertConfigFrame(const Frame::Ptr &frame);
 
 private:
-    bool _is_idr = false;
+    bool _insert_config_frame = false;
     int _width = 0;
     int _height = 0;
     float _fps = 0;