diff --git a/transcoder/ackHandler/ackHandlerInternal.cpp b/transcoder/ackHandler/ackHandlerInternal.cpp
index d979b10d..9722d656 100644
--- a/transcoder/ackHandler/ackHandlerInternal.cpp
+++ b/transcoder/ackHandler/ackHandlerInternal.cpp
@@ -7,7 +7,7 @@
             try {
                am.addIn(*desc);
              } catch(const std::exception &e) {
-                   LOGGER(LoggingCategory,AV_LOG_ERROR," %s audio map. ack_map_add_input %d %lld failed due to %s",
+                   LOGGER(LoggingCategory,AV_LOG_ERROR," %s map. ack_map_add_input %lld %lld failed due to %s",
                         am.m_name.c_str(),desc->id, desc->pts,e.what());
              }
        }
@@ -20,7 +20,7 @@
                 try {
                    am.addFiltered(*desc);
                  } catch(const std::exception &e) {
-                       LOGGER(LoggingCategory,AV_LOG_ERROR," %s audio map. ack_map_add_filtered %d %lld failed due to %s",
+                       LOGGER(LoggingCategory,AV_LOG_ERROR," %s map. ack_map_add_filtered %lld %lld failed due to %s",
                             am.m_name.c_str(),desc->id, desc->pts,e.what());
                  }
            }
@@ -33,7 +33,7 @@
              try {
                 am.addOut(*desc);
             } catch(const std::exception &e) {
-                  LOGGER(LoggingCategory,AV_LOG_ERROR," %s audio map. ack_map_add_output %d %lld failed due to %s",
+                  LOGGER(LoggingCategory,AV_LOG_ERROR," %s map. ack_map_add_output %lld %lld failed due to %s",
                     am.m_name.c_str(),desc->id, desc->pts,e.what());
             }
         }
@@ -48,7 +48,7 @@
               am.map(ack,*ao);
               return;
             } catch(const std::exception &e) {
-                 LOGGER(LoggingCategory,AV_LOG_ERROR," %s audio map. ack_map_ack %lld failed due to %s",
+                 LOGGER(LoggingCategory,AV_LOG_ERROR," %s map. ack_map_ack %lld failed due to %s",
                         am.m_name.c_str(),ack, e.what());
             }
         }
diff --git a/transcoder/receiver_server.c b/transcoder/receiver_server.c
index d24f6c72..bc37e0f7 100644
--- a/transcoder/receiver_server.c
+++ b/transcoder/receiver_server.c
@@ -119,9 +119,14 @@ int clientLoop(receiver_server_t *server,receiver_server_session_t *session,tran
                 if(!autoAckMode) {
                     transcode_session_get_ack_frame_id(transcode_session,&current_position);
                     // TODO: we cheat here, received_frame_id may have not been persisted yet
-                    // so we should make sure all of the frames are consumed ny upstream
+                    // so we should ensure all of the frames up to received_frame_id
+                    // inclusively, are consumed by upstream
                     current_position.frame_id = current_position.transcoded_frame_id = received_frame_id;
-                    LOGGER(CATEGORY_RECEIVER,AV_LOG_INFO,"[%s] sending ack for packet # : %lld",session->stream_name,current_position.frame_id);
+                    LOGGER(CATEGORY_RECEIVER,AV_LOG_INFO,"[%s] sending ack for frame position: %lld, %lld, %lld",
+                        session->stream_name,
+                        current_position.frame_id,
+                        current_position.transcoded_frame_id,
+                        current_position.offset);
                     _S(KMP_send_ack(&session->kmpClient,&current_position));
                 }
                 break;
diff --git a/transcoder/transcode/transcode_session_output.c b/transcoder/transcode/transcode_session_output.c
index 5066cdf4..df73953a 100644
--- a/transcoder/transcode/transcode_session_output.c
+++ b/transcoder/transcode/transcode_session_output.c
@@ -130,14 +130,16 @@ int transcode_session_output_send_output_packet(transcode_session_output_t *pOut
         }
         av_write_frame(pOutput->oc, NULL);
 
-        ack_desc_t desc = {0};
-        if( (ret = get_packet_frame_id(cpPacket,&desc.id)) >= 0) {
-            if(pOutput->acker.ctx){
-                 pOutput->acker.map(&pOutput->acker,desc.id,&desc);
-             }
-            pOutput->lastMappedAck = desc.id;
-            pOutput->lastAck=desc.id;
-            pOutput->lastOffset=desc.offset;
+        if(cpPacket->flags & AV_PKT_FLAG_KEY) {
+            ack_desc_t desc = {0};
+            if( (ret = get_packet_frame_id(cpPacket,&desc.id)) >= 0) {
+                if(pOutput->acker.ctx){
+                     pOutput->acker.map(&pOutput->acker,desc.id,&desc);
+                 }
+                pOutput->lastMappedAck = desc.id;
+                pOutput->lastAck=desc.id;
+                pOutput->lastOffset=desc.offset;
+            }
         }
 
         av_packet_free(&cpPacket);