diff --git a/av/stream.pxd b/av/stream.pxd
index 8ebda5704..d39585167 100644
--- a/av/stream.pxd
+++ b/av/stream.pxd
@@ -21,7 +21,6 @@ cdef class Stream:
     # Private API.
     cdef _init(self, Container, lib.AVStream*, CodecContext)
     cdef _finalize_for_output(self)
-    cdef _get_side_data(self, lib.AVStream *stream)
     cdef _set_time_base(self, value)
     cdef _set_id(self, value)
 
diff --git a/av/stream.pyi b/av/stream.pyi
index 212c721a9..89f49c12f 100644
--- a/av/stream.pyi
+++ b/av/stream.pyi
@@ -20,8 +20,6 @@ class Stream:
     metadata: dict[str, str]
     id: int
     profile: str
-    nb_side_data: int
-    side_data: dict[str, str]
     index: int
     time_base: Fraction | None
     average_rate: Fraction | None
diff --git a/av/stream.pyx b/av/stream.pyx
index 44354b651..19ac8e703 100644
--- a/av/stream.pyx
+++ b/av/stream.pyx
@@ -85,8 +85,6 @@ cdef class Stream:
         self.codec_context = codec_context
         if self.codec_context:
             self.codec_context.stream_index = stream.index
-
-        self.nb_side_data, self.side_data = self._get_side_data(stream)
         
         self.metadata = avdict_to_dict(
             stream.metadata,
@@ -128,20 +126,6 @@ cdef class Stream:
         # Lets just copy what we want.
         err_check(lib.avcodec_parameters_from_context(self.ptr.codecpar, self.codec_context.ptr))
 
-    cdef _get_side_data(self, lib.AVStream *stream):
-        # Get DISPLAYMATRIX SideData from a lib.AVStream object.
-        # Returns: tuple[int, dict[str, Any]]
-
-        nb_side_data = stream.nb_side_data
-        side_data = {}
-        
-        for i in range(nb_side_data):
-            # Based on: https://www.ffmpeg.org/doxygen/trunk/dump_8c_source.html#l00430
-            if stream.side_data[i].type == lib.AV_PKT_DATA_DISPLAYMATRIX:
-                side_data["DISPLAYMATRIX"] = lib.av_display_rotation_get(<const int32_t *>stream.side_data[i].data)
-
-        return nb_side_data, side_data
-
     @property
     def id(self):
         """
diff --git a/include/libavformat/avformat.pxd b/include/libavformat/avformat.pxd
index 1e16378bf..5fa25043a 100644
--- a/include/libavformat/avformat.pxd
+++ b/include/libavformat/avformat.pxd
@@ -46,10 +46,6 @@ cdef extern from "libavformat/avformat.h" nogil:
         AVRational r_frame_rate
         AVRational sample_aspect_ratio
 
-        int nb_side_data
-        AVPacketSideData *side_data
-
-
     # http://ffmpeg.org/doxygen/trunk/structAVIOContext.html
     cdef struct AVIOContext:
         unsigned char* buffer
diff --git a/include/libavutil/avutil.pxd b/include/libavutil/avutil.pxd
index 58dd43922..ed281aeaf 100644
--- a/include/libavutil/avutil.pxd
+++ b/include/libavutil/avutil.pxd
@@ -4,9 +4,6 @@ from libc.stdint cimport int64_t, uint8_t, uint64_t, int32_t
 cdef extern from "libavutil/mathematics.h" nogil:
     pass
 
-cdef extern from "libavutil/display.h" nogil:
-    cdef double av_display_rotation_get(const int32_t matrix[9])
-
 cdef extern from "libavutil/rational.h" nogil:
     cdef int av_reduce(int *dst_num, int *dst_den, int64_t num, int64_t den, int64_t max)
 
diff --git a/tests/test_streams.py b/tests/test_streams.py
index 64bb63c36..b6097d537 100644
--- a/tests/test_streams.py
+++ b/tests/test_streams.py
@@ -35,15 +35,9 @@ def test_selection(self) -> None:
         data = container.streams.data[0]
         assert data == container.streams.best("data")
 
-    def test_noside_data(self) -> None:
-        container = av.open(fate_suite("h264/interlaced_crop.mp4"))
-        video = container.streams.video[0]
-
-        assert video.nb_side_data == 0
-
-    def test_side_data(self) -> None:
-        container = av.open(fate_suite("mov/displaymatrix.mov"))
-        video = container.streams.video[0]
+    # def test_side_data(self) -> None:
+    #     container = av.open(fate_suite("mov/displaymatrix.mov"))
+    #     video = container.streams.video[0]
 
-        assert video.nb_side_data == 1
-        assert video.side_data["DISPLAYMATRIX"] == -90.0
+    #     assert video.nb_side_data == 1
+    #     assert video.side_data["DISPLAYMATRIX"] == -90.0