ffmpeg Windows流向Twitch，管道中的视频仅发送约100帧并卡住

Question

我尝试在Windows上使用带ffmpeg的Python将rawVideo（一个numpy数组）流式传输到Twitch。但是大约100帧之后，我就卡住了。

我的子流程参数：

command = [
    "ffmpeg.exe",
        '-f', 'rawvideo',
        '-vcodec','rawvideo',
        '-s', '480x640', 
        '-pix_fmt', 'rgb24',
        '-r', '30',
        '-i', '-', 
        '-vcodec', 'libx264',
        '-b:v' , '5M',
        '-acodec', 'aac',
        '-b:a', '256k',
        '-r','30',
        '-f', 'flv', 'rtmp://live-fra.twitch.tv/app/%removed for stackoverflow%'
]
[...]
pipe = subprocess.Popen( command, stdin=subprocess.PIPE, stderr=subprocess.PIPE, stdout=subprocess.PIPE)

发送帧：

frames = 0
frame = np.zeros((480, 640, 3))
#print(pipe,dir(pipe))
while 1:
    try:
        pipe.stdin.write(frame.tobytes())   # < gets stuck here after ~100 frames     
        frames += 1
        print("frame_send", frames)       
    except Exception as e:
         out, ffmpeg_error = pipe.communicate()
         print("error:" , ffmpeg_error  , e , out )
         break
    time.sleep( 1 / 30 )

它没有卡在“ pipe.stdin.write（frame.tobytes（））”上的任何错误