1、修复生成的rtmp无法被flash播放的问题

2、修复RTSP有B帧时，相对时间戳计算异常的问题

src/Common/Stamp.cpp

@@ -27,25 +27,27 @@
 #include "Stamp.h"
 
 #define MAX_DELTA_STAMP 300
+#define ABS(x) ((x) > 0 ? (x) : (-x))
 
 namespace mediakit {
 
 int64_t DeltaStamp::deltaStamp(int64_t stamp) {
     if(!_last_stamp){
         //第一次计算时间戳增量,时间戳增量为0
-        _last_stamp = stamp;
+        if(stamp){
+            _last_stamp = stamp;
+        }
         return 0;
     }
 
     int64_t ret = stamp - _last_stamp;
-    if(ret >= 0){
-        //时间戳增量为正，返回之
+    if(ABS(ret) < MAX_DELTA_STAMP){
+        //时间戳变化不明显
         _last_stamp = stamp;
-        //在直播情况下，时间戳增量不得大于MAX_DELTA_STAMP
-        return  ret < MAX_DELTA_STAMP ? ret : (_playback ? ret : 0);
+        return ret;
     }
 
-    //时间戳增量为负，说明时间戳回环了或回退了
+    //时间戳变化太明显，可能回环了或者seek了
     _last_stamp = stamp;
     return _playback ? ret : 0;
 }

src/Extension/H264.h

@@ -49,6 +49,7 @@ public:
         NAL_SPS = 7,
         NAL_PPS = 8,
         NAL_IDR = 5,
+        NAL_SEI = 6,
     } NalType;
 
     char *data() const override{

src/Extension/H264Rtmp.cpp

@@ -140,6 +140,10 @@ void H264RtmpEncoder::inputFrame(const Frame::Ptr &frame) {
         }
     }
 
+    if(type == H264Frame::NAL_SEI){
+        return;
+    }
+
     if(_lastPacket && _lastPacket->timeStamp != frame->stamp()) {
         RtmpCodec::inputRtmp(_lastPacket, _lastPacket->isVideoKeyFrame());
         _lastPacket = nullptr;
@@ -149,7 +153,7 @@ void H264RtmpEncoder::inputFrame(const Frame::Ptr &frame) {
         //I or P or B frame
         int8_t flags = 7; //h.264
         bool is_config = false;
-        flags |= ((frame->keyFrame() ? FLV_KEY_FRAME : FLV_INTER_FRAME) << 4);
+        flags |= (((frame->configFrame() || frame->keyFrame()) ? FLV_KEY_FRAME : FLV_INTER_FRAME) << 4);
 
         _lastPacket = ResourcePoolHelper<RtmpPacket>::obtainObj();
         _lastPacket->strBuf.clear();

src/Record/MP4Reader.cpp

@@ -225,8 +225,10 @@ inline bool MP4Reader::readVideoSample(int iTimeInc,bool justSeekSyncFrame) {
 			uint32_t numBytes = _video_sample_max_size;
 			MP4Duration pRenderingOffset;
 			if(MP4ReadSample(_hMP4File, _video_trId, iIdx + 1, &pBytes, &numBytes,NULL,NULL,&pRenderingOffset,&_bSyncSample)){
-				if (!justSeekSyncFrame) {
-					uint32_t iOffset = 0;
+                if (!justSeekSyncFrame) {
+                    uint32_t dts = (double) _video_ms * iIdx / _video_num_samples;
+                    uint32_t pts = dts + pRenderingOffset / 90;
+                    uint32_t iOffset = 0;
 					while (iOffset < numBytes) {
 						uint32_t iFrameLen;
 						memcpy(&iFrameLen,pBytes + iOffset,4);
@@ -235,8 +237,7 @@ inline bool MP4Reader::readVideoSample(int iTimeInc,bool justSeekSyncFrame) {
                             break;
                         }
 						memcpy(pBytes + iOffset, "\x0\x0\x0\x1", 4);
-						uint32_t dts = (double) _video_ms * iIdx / _video_num_samples;
-						writeH264(pBytes + iOffset, iFrameLen + 4, dts, dts + pRenderingOffset / 90);
+						writeH264(pBytes + iOffset, iFrameLen + 4, dts, pts);
 						iOffset += (iFrameLen + 4);
 					}
 				}else if(_bSyncSample){
@@ -260,9 +261,10 @@ inline bool MP4Reader::readAudioSample(int iTimeInc,bool justSeekSyncFrame) {
 			uint8_t *pBytes = _adts.buffer + 7;
 			if(MP4ReadSample(_hMP4File, _audio_trId, i + 1, &pBytes, &numBytes)){
 				if (!justSeekSyncFrame) {
+					uint32_t dts = (double) _audio_ms * i / _audio_num_samples;
 					_adts.aac_frame_length = 7 + numBytes;
 					writeAdtsHeader(_adts, _adts.buffer);
-					writeAAC(_adts.buffer, _adts.aac_frame_length, (double) _audio_ms * i / _audio_num_samples);
+					writeAAC(_adts.buffer, _adts.aac_frame_length, dts);
 				}
 			}else{
 				ErrorL << "读取音频失败:" << i+ 1;