python rtmp推流 shishi图片

如果你要实现实时推送图片，你需要使用Python的`opencv`库来获取视频帧并将其实时传输到FFmpeg。以下是一个示例代码：

import cv2
import subprocess

def start_push():
    rtmp_url = "rtmp://your.server.com/live/streamkey"
    video_capture = cv2.VideoCapture(0)
    command = ['ffmpeg',
               '-f', 'rawvideo',
               '-pix_fmt', 'bgr24',
               '-s', '{}x{}'.format(int(video_capture.get(3)), int(video_capture.get(4))),
               '-i', '-',
               '-c:v', 'libx264',
               '-preset', 'ultrafast',
               '-maxrate', '3000k',
               '-bufsize', '6000k',
               '-pix_fmt', 'yuv420p',
               '-g', '50',
               '-c:a', 'aac',
               '-b:a', '160k',
               '-ac', '2',
               '-ar', '44100',
               '-f', 'flv',
               rtmp_url]

    pipe = subprocess.Popen(command, stdin=subprocess.PIPE)

    while True:
        ret, frame = video_capture.read()
        if not ret:
            break
        pipe.stdin.write(frame.tostring())

    pipe.stdin.close()
    pipe.wait()
    video_capture.release()

if __name__ == '__main__':
    start_push()

这个代码中的`start_push()`函数会使用OpenCV捕获摄像头视频帧，并将其实时传输到FFmpeg，从而实现实时推送图片。你需要将`rtmp://your.server.com/live/streamkey`替换为你要推送到的RTMP服务器和流密钥。