RTSP source: fix inversion of track data that happened randomly in case of multiple tracks (#353)

go.mod

@@ -5,7 +5,7 @@ go 1.15
 require (
 	github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751 // indirect
 	github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d // indirect
-	github.com/aler9/gortsplib v0.0.0-20210405155604-491b36cdc4b2
+	github.com/aler9/gortsplib v0.0.0-20210417174800-805d578b6c63
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/fsnotify/fsnotify v1.4.9
 	github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51

go.sum

@@ -2,8 +2,8 @@ github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751 h1:JYp7IbQjafo
 github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d h1:UQZhZ2O0vMHr2cI+DC1Mbh0TJxzA3RcLoMsFw+aXw7E=
 github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d/go.mod h1:rBZYJk541a8SKzHPHnH3zbiI+7dagKZ0cgpgrD7Fyho=
-github.com/aler9/gortsplib v0.0.0-20210405155604-491b36cdc4b2 h1:AYmBhFE5DTGoQ8XKqmklWO3+CCYYR1X18XL/b/sndmM=
-github.com/aler9/gortsplib v0.0.0-20210405155604-491b36cdc4b2/go.mod h1:zVCg+TQX445hh1pC5QgAuuBvvXZMWLY1XYz626dGFqY=
+github.com/aler9/gortsplib v0.0.0-20210417174800-805d578b6c63 h1:Ex7N/9GT4SQNHS49iJdQV8SiYJ7BXux3GCG3/z2KC6I=
+github.com/aler9/gortsplib v0.0.0-20210417174800-805d578b6c63/go.mod h1:zVCg+TQX445hh1pC5QgAuuBvvXZMWLY1XYz626dGFqY=
 github.com/aler9/rtmp v0.0.0-20210403095203-3be4a5535927 h1:95mXJ5fUCYpBRdSOnLAQAdJHHKxxxJrVCiaqDi965YQ=
 github.com/aler9/rtmp v0.0.0-20210403095203-3be4a5535927/go.mod h1:vzuE21rowz+lT1NGsWbreIvYulgBpCGnQyeTyFblUHc=
 github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=