Any way to resolve noise problem

[wqh17101]

Overview

when i use

image:np.ndarray

fmpeg -y -vcodec rawvideo -pix_fmt bgr24 -s AxB -i - -c:v libx264 -pix_fmt yuv420p -preset ultrafast -f rtsp -rtsp_transport tcp url

to push image.to_string 

It works well

So how can i do this by Pyav
I try:

video = av.open(url)
container = av.open(outpout_url, "w", format="rtsp", options={'rtsp_transport': 'tcp'})
stream = container.add_stream('h264')
stream.pix_fmt = 'yuv420p'
stream.options = {"preset": "ultrafast", "vcodec": "rawvideo"}
for packet in video.demux():
    if packet.dts is None:
        continue
    for frame in packet.decode():
        if packet.stream.type != 'video':
            continue
        print("frame = ", frame)
        img = frame.to_ndarray(format='bgr24')
        frame2 = av.VideoFrame.from_ndarray(img, format='bgr24')
        for packet2 in stream.encode(frame2):
            container.mux(packet2)

I get many noise like square

Expected behavior

the same as FFMPEG cmd

Versions

• OS: Linux
• PyAV runtime: 9.0.0

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• PyAV build:

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• FFmpeg:

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Research

I have done the following:

• Checked the PyAV documentation
• Searched on Google
• Searched on Stack Overflow
• Looked through old GitHub issues
• Asked on PyAV Gitter
• ... and waited 72 hours for a response.