Open cv from mediaMTX Error

[roycw]

Question

Hello, i have a cmall pytong program that reads from mediamtx via opencv.
cap = cv2.VideoCapture(f"rtsp://mediamtx:8554/{camera['camera_id']}", cv2.CAP_FFMPEG)
get the feed but along with the feed i get:
[h264 @ 0x559f941505c0] error while decoding MB 140 107, bytestream -20

on every single frame....

When i pull directly from the camera ii dont get this error.

My router is Camera -> MediaMTX -> Open cv.

Any idea why Mediiamtx gives me this error ?