add missing stub in av.sidedata

av/sidedata/motionvectors.pyi

@@ -0,0 +1,22 @@
+from typing import Any, Sequence
+
+import numpy as np
+
+from .sidedata import SideData
+
+class MotionVectors(SideData, Sequence[Any]):
+    def __getitem__(self, index: int) -> MotionVector: ...
+    def __len__(self) -> int: ...
+    def to_ndarray(self) -> np.ndarray[Any, Any]: ...
+
+class MotionVector:
+    source: int
+    w: int
+    h: int
+    src_x: int
+    src_y: int
+    dst_x: int
+    dst_y: int
+    motion_x: int
+    motion_y: int
+    motion_scale: int

av/sidedata/sidedata.pyi

@@ -0,0 +1,31 @@
+from collections.abc import Mapping
+
+from av.buffer import Buffer
+from av.enum import EnumItem
+from av.frame import Frame
+
+class Type(EnumItem):
+    PANSCAN: int
+    A53_CC: int
+    STEREO3D: int
+    MATRIXENCODING: int
+    DOWNMIX_INFO: int
+    REPLAYGAIN: int
+    DISPLAYMATRIX: int
+    AFD: int
+    MOTION_VECTORS: int
+    SKIP_SAMPLES: int
+    AUDIO_SERVICE_TYPE: int
+    MASTERING_DISPLAY_METADATA: int
+    GOP_TIMECODE: int
+    SPHERICAL: int
+    CONTENT_LIGHT_LEVEL: int
+    ICC_PROFILE: int
+    SEI_UNREGISTERED: int
+
+class SideData(Buffer):
+    type: Type
+    DISPLAYMATRIX: int
+
+class SideDataContainer(Mapping[str, int]):
+    frame: Frame