修复rtp pts 时间戳回退导致ntp时间戳计算异常的bug:#1152

src/Common/Stamp.cpp

@@ -231,9 +231,7 @@ uint64_t NtpStamp::getNtpStamp(uint32_t rtp_stamp, uint32_t sample_rate) {
     if (rtp_stamp == _last_rtp_stamp) {
         return _last_ntp_stamp_ms;
     }
-    auto ret = getNtpStamp_l(rtp_stamp, sample_rate);
-    _last_rtp_stamp = rtp_stamp;
-    return ret;
+    return getNtpStamp_l(rtp_stamp, sample_rate);
 }
 
 uint64_t NtpStamp::getNtpStamp_l(uint32_t rtp_stamp, uint32_t sample_rate) {

src/Rtsp/RtpReceiver.cpp

@@ -94,7 +94,7 @@ RtpPacket::Ptr RtpTrack::inputRtp(TrackType type, int sample_rate, uint8_t *ptr,
         rtp->ntp_stamp = rtp->getStamp() * uint64_t(1000) / sample_rate;
     } else {
         //设置ntp时间戳
-        rtp->ntp_stamp = _ntp_stamp.getNtpStamp(ntohl(rtp->getHeader()->stamp), sample_rate);
+        rtp->ntp_stamp = _ntp_stamp.getNtpStamp(rtp->getStamp(), sample_rate);
     }
     onBeforeRtpSorted(rtp);
     sortPacket(rtp->getSeq(), rtp);