diff --git a/trunk/src/app/srs_app_rtc_source.cpp b/trunk/src/app/srs_app_rtc_source.cpp
index a07e61d10..083b2dc46 100644
--- a/trunk/src/app/srs_app_rtc_source.cpp
+++ b/trunk/src/app/srs_app_rtc_source.cpp
@@ -1437,6 +1437,7 @@ srs_error_t SrsRtmpFromRtcBridger::packet_video(SrsRtpPacket* src)
     cache_video_pkts_[index].pkt = pkt;
     cache_video_pkts_[index].sn = pkt->header.get_sequence();
     cache_video_pkts_[index].ts = pkt->get_avsync_time();
+    cache_video_pkts_[index].rtp_ts = pkt->header.get_timestamp();
 
     // check whether to recovery lost packet and can construct a video frame
     if (lost_sn_ == pkt->header.get_sequence()) {
@@ -1525,6 +1526,7 @@ srs_error_t SrsRtmpFromRtcBridger::packet_video_key_frame(SrsRtpPacket* pkt)
     cache_video_pkts_[index].pkt = pkt;
     cache_video_pkts_[index].sn = pkt->header.get_sequence();
     cache_video_pkts_[index].ts = pkt->get_avsync_time();
+    cache_video_pkts_[index].rtp_ts = pkt->header.get_timestamp();
 
     int32_t sn = lost_sn_;
     uint16_t tail_sn = 0;
@@ -1622,6 +1624,7 @@ srs_error_t SrsRtmpFromRtcBridger::packet_video_rtmp(const uint16_t start, const
         cache_video_pkts_[index].in_use = false;
         cache_video_pkts_[index].pkt = NULL;
         cache_video_pkts_[index].ts = 0;
+        cache_video_pkts_[index].rtp_ts = 0;
         cache_video_pkts_[index].sn = 0;
 
         SrsRtpFUAPayload2* fua_payload = dynamic_cast<SrsRtpFUAPayload2*>(pkt->payload());
@@ -1692,7 +1695,7 @@ srs_error_t SrsRtmpFromRtcBridger::packet_video_rtmp(const uint16_t start, const
 
 int32_t SrsRtmpFromRtcBridger::find_next_lost_sn(uint16_t current_sn, uint16_t& end_sn)
 {
-    uint32_t last_ts = cache_video_pkts_[cache_index(header_sn_)].ts;
+    uint32_t last_rtp_ts = cache_video_pkts_[cache_index(header_sn_)].rtp_ts;
     for (int i = 0; i < s_cache_size; ++i) {
         uint16_t lost_sn = current_sn + i;
         int index = cache_index(lost_sn);
@@ -1701,7 +1704,7 @@ int32_t SrsRtmpFromRtcBridger::find_next_lost_sn(uint16_t current_sn, uint16_t&
             return lost_sn;
         }
         //check time first, avoid two small frame mixed case decode fail
-        if (last_ts != cache_video_pkts_[index].ts) {
+        if (last_rtp_ts != cache_video_pkts_[index].rtp_ts) {
             end_sn = lost_sn - 1;
             return -1;
         }
@@ -1724,6 +1727,7 @@ void SrsRtmpFromRtcBridger::clear_cached_video()
             srs_freep(cache_video_pkts_[i].pkt);
             cache_video_pkts_[i].sn = 0;
             cache_video_pkts_[i].ts = 0;
+            cache_video_pkts_[i].rtp_ts = 0;
             cache_video_pkts_[i].in_use = false;
         }
     }
diff --git a/trunk/src/app/srs_app_rtc_source.hpp b/trunk/src/app/srs_app_rtc_source.hpp
index d49e6f230..c8000e02d 100644
--- a/trunk/src/app/srs_app_rtc_source.hpp
+++ b/trunk/src/app/srs_app_rtc_source.hpp
@@ -300,6 +300,7 @@ private:
         bool in_use;
         uint16_t sn;
         uint32_t ts;
+        uint32_t rtp_ts;
         SrsRtpPacket* pkt;
     };
     const static uint16_t s_cache_size = 512;
@@ -325,7 +326,7 @@ private:
     int32_t find_next_lost_sn(uint16_t current_sn, uint16_t& end_sn);
     void clear_cached_video();
     inline uint16_t cache_index(uint16_t current_sn) {
-        return current_sn%s_cache_size;
+        return current_sn % s_cache_size;
     }
     bool check_frame_complete(const uint16_t start, const uint16_t end);
 };