VideoFrame and AudioFrame built from a read-only NumPy buffer fail in capture_frame with TypeError #884

rtc.VideoFrame and rtc.AudioFrame accept a memoryview. If the memoryview is read-only and covers the whole buffer, and the underlying object is not bytes or bytearray (for example a NumPy array from np.frombuffer), the constructor accepts it. Capturing the frame then fails in get_address:

TypeError: expected bytes, bytearray, or memoryview, got <class 'numpy.ndarray'>

Steps to reproduce

import numpy as np
from livekit import rtc

w, h = 4, 2
pixels = np.frombuffer(bytes(w * h * 4), dtype=np.uint8)  # read-only array
frame = rtc.VideoFrame(w, h, rtc.VideoBufferType.RGBA, memoryview(pixels))
frame._proto_info()  # the call VideoSource.capture_frame makes; raises TypeError

Expected behavior

The frame is captured, as it is when you pass pixels.tobytes() or a writable array.

Cause

_ensure_compatible_buffer only copies memoryviews whose nbytes differs from len(data.obj). For a read-only memoryview, get_address then reads the address from data.obj, which only works for bytes and bytearray.

Environment

livekit 1.1.21, Python 3.14, Linux x86_64.