diff --git a/av/audio/codeccontext.pyi b/av/audio/codeccontext.pyi
index 80c93afc8..f6ac21a43 100644
--- a/av/audio/codeccontext.pyi
+++ b/av/audio/codeccontext.pyi
@@ -1,5 +1,5 @@
 from collections.abc import Iterator
-from typing import Literal
+from typing import Literal, final
 
 from av.codec.context import CodecContext
 from av.packet import Packet
@@ -16,6 +16,7 @@ class _Layout:
     def __get__(self, i: object | None, owner: type | None = None) -> AudioLayout: ...
     def __set__(self, instance: object, value: AudioLayout | str) -> None: ...
 
+@final
 class AudioCodecContext(CodecContext):
     frame_size: int
     sample_rate: int
@@ -27,6 +28,6 @@ class AudioCodecContext(CodecContext):
     def channels(self) -> int: ...
     @property
     def block_align(self) -> int: ...
-    def encode(self, frame: AudioFrame | None = None) -> list[Packet]: ...
-    def encode_lazy(self, frame: AudioFrame | None = None) -> Iterator[Packet]: ...
+    def encode(self, frame: AudioFrame | None = None) -> list[Packet]: ...  # type: ignore[override]
+    def encode_lazy(self, frame: AudioFrame | None = None) -> Iterator[Packet]: ...  # type: ignore[override]
     def decode(self, packet: Packet | None = None) -> list[AudioFrame]: ...
diff --git a/av/codec/context.pyi b/av/codec/context.pyi
index d34d5b2d0..e9b5764af 100644
--- a/av/codec/context.pyi
+++ b/av/codec/context.pyi
@@ -3,8 +3,11 @@ from enum import Flag, IntEnum, IntFlag
 from fractions import Fraction
 from typing import ClassVar, Literal, cast, overload
 
+from typing_extensions import disjoint_base
+
 from av.audio import _AudioCodecName
 from av.audio.codeccontext import AudioCodecContext
+from av.frame import Frame
 from av.packet import Packet, PktSideDataT
 from av.rational import AVRational
 from av.sidedata.sidedata import Type as FrameSideDataType
@@ -116,6 +119,7 @@ class CodecOptionSet:
     generic: tuple[CodecOption, ...]
     private: tuple[CodecOption, ...]
 
+@disjoint_base
 class CodecContext:
     name: str
     type: Literal["video", "audio", "data", "subtitle", "attachment"]
@@ -222,3 +226,6 @@ class CodecContext:
         self, raw_input: bytes | bytearray | memoryview | None = None
     ) -> list[Packet]: ...
     def flush_buffers(self) -> None: ...
+    def encode(self, frame: Frame | None = None): ...
+    def encode_lazy(self, frame: Frame | None = None): ...
+    def decode(self, packet: Packet | None = None): ...
diff --git a/av/subtitles/codeccontext.pyi b/av/subtitles/codeccontext.pyi
index 7f8a49d09..57bad688b 100644
--- a/av/subtitles/codeccontext.pyi
+++ b/av/subtitles/codeccontext.pyi
@@ -1,9 +1,10 @@
-from typing import Literal
+from typing import Literal, final
 
 from av.codec.context import CodecContext
 from av.packet import Packet
 from av.subtitles.subtitle import SubtitleSet
 
+@final
 class SubtitleCodecContext(CodecContext):
     type: Literal["subtitle"]
     subtitle_header: bytes | None
diff --git a/av/video/codeccontext.pyi b/av/video/codeccontext.pyi
index 259c4e594..d73b6d2f4 100644
--- a/av/video/codeccontext.pyi
+++ b/av/video/codeccontext.pyi
@@ -1,6 +1,6 @@
 from collections.abc import Iterator
 from fractions import Fraction
-from typing import Literal
+from typing import Literal, final
 
 from av.codec.context import CodecContext
 from av.packet import Packet
@@ -10,6 +10,7 @@ from .format import VideoFormat
 from .frame import VideoFrame
 from .reformatter import VideoReformatter
 
+@final
 class VideoCodecContext(CodecContext):
     format: VideoFormat | None
     width: int
@@ -52,6 +53,6 @@ class VideoCodecContext(CodecContext):
     qmax: int
     type: Literal["video"]
 
-    def encode(self, frame: VideoFrame | None = None) -> list[Packet]: ...
-    def encode_lazy(self, frame: VideoFrame | None = None) -> Iterator[Packet]: ...
+    def encode(self, frame: VideoFrame | None = None) -> list[Packet]: ...  # type: ignore[override]
+    def encode_lazy(self, frame: VideoFrame | None = None) -> Iterator[Packet]: ...  # type: ignore[override]
     def decode(self, packet: Packet | None = None) -> list[VideoFrame]: ...