diff --git a/src/Common/Parser.h b/src/Common/Parser.h
index bf9854a7..eaa1874d 100644
--- a/src/Common/Parser.h
+++ b/src/Common/Parser.h
@@ -163,7 +163,7 @@ class Parser {
         for (string &key_val : arg_vec) {
             auto key = FindField(key_val.data(), NULL, key_delim);
             auto val = FindField(key_val.data(), key_delim, NULL);
-            ret.emplace_force(key,val);
+            ret.emplace_force(trim(key),trim(val));
         }
         return ret;
     }
diff --git a/src/Extension/Factory.cpp b/src/Extension/Factory.cpp
index b81772a8..763ba27c 100644
--- a/src/Extension/Factory.cpp
+++ b/src/Extension/Factory.cpp
@@ -62,9 +62,6 @@ Track::Ptr Factory::getTrackBySdp(const SdpTrack::Ptr &track) {
     if (strcasecmp(track->_codec.data(), "h264") == 0) {
         //a=fmtp:96 packetization-mode=1;profile-level-id=42C01F;sprop-parameter-sets=Z0LAH9oBQBboQAAAAwBAAAAPI8YMqA==,aM48gA==
         auto map = Parser::parseArgs(FindField(track->_fmtp.data()," ", nullptr),";","=");
-        for(auto &pr : map){
-            trim(pr.second);
-        }
         auto sps_pps = map["sprop-parameter-sets"];
         if(sps_pps.empty()){
             return std::make_shared<H264Track>();
@@ -79,9 +76,6 @@ Track::Ptr Factory::getTrackBySdp(const SdpTrack::Ptr &track) {
     if (strcasecmp(track->_codec.data(), "h265") == 0) {
         //a=fmtp:96 sprop-sps=QgEBAWAAAAMAsAAAAwAAAwBdoAKAgC0WNrkky/AIAAADAAgAAAMBlQg=; sprop-pps=RAHA8vA8kAA=
         auto map = Parser::parseArgs(FindField(track->_fmtp.data()," ", nullptr),";","=");
-        for(auto &pr : map){
-            trim(pr.second);
-        }
         auto vps = decodeBase64(map["sprop-vps"]);
         auto sps = decodeBase64(map["sprop-sps"]);
         auto pps = decodeBase64(map["sprop-pps"]);