MaixCAM MaixPy Video Streaming RTMP Push Streaming

Introduction

This document provides methods for pushing H264 video streams via RTMP

How to use

The following example shows pushing an h264 video stream to rtmp://192.168.0.30:1935/live/stream

from maix import camera, time, rtmp, image

cam = camera.Camera(640, 480, image.Format.FMT_YVU420SP)

# rtmp://192.168.0.30:1935/live/stream
host = '192.168.0.30'
port = 1935
app = 'live'
stream = 'stream'
bitrate = 1000_000
r = rtmp.Rtmp(host, port, app, stream, bitrate)
r.bind_camera(cam)
r.start()

while True:
    time.sleep(1)

Steps:

1. Import the camera、rtmp、time and image modules:

   from maix import camera, time, rtmp, image
   

2. Initialize the camera:

   cam = camera.Camera(640, 480, image.Format.FMT_YVU420SP) # Initialise camera, output resolution 640x480 NV21 format
   

   • Note that the RTMP module currently only supports the NV21 format, so the camera needs to be configured to output in NV21 format.

3. Initialise and start the Rtmp object

   r = rtmp.Rtmp(host, port, app, stream, bitrate)
   r.bind_camera(cam)
   r.start()
   

   • r = rtmp.Rtmp(host, port, app, stream, bitrate) is used to create an Rtmp object, where host refers to the ip address or domain of the rtmp server, app refers to the name of the application that is open to the rtmp server, and stream refers to the name of the rtmp stream, which can also be used as the key for pushing the stream
   • r.bind_camera(cam) is used to bind a Camera object, the original Camera object can not be used after binding.
   • r.start() is used to start the rtmp stream.

4. Done

Support for Streaming Audio

MaixPy supports streaming both audio and video simultaneously. By binding a Recorder object,

Note: This method is supported in MaixPy v4.7.9 and later versions

The following is an example code:

from maix import camera, time, app, rtmp, image, audio

cam = camera.Camera(640, 480, image.Format.FMT_YVU420SP)
audio_recorder = audio.Recorder()

host="192.168.0.63"
port=1935
app_name="live"
stream_name="stream"
client = rtmp.Rtmp(host, port, app_name, stream_name)
client.bind_camera(cam)
client.bind_audio_recorder(audio_recorder)
client.start()

print(f"rtmp://{host}:{port}/{app_name}/{stream_name}")
while not app.need_exit():
    time.sleep(1)

In the code above, an audio_recorder object is created using audio.Recorder(), and the bind_audio_recorder() method of the Rtmp server is used to bind this object. Stream the audio data while pushing the video stream.

Push streaming test to Bilibili

Launch bilibili live stream

1. Click on Live Streaming

   

2. Click on Live Streaming Settings

3. Find the live streaming address

4. Scroll down, select a category, and click Start Live!

5. Get the push stream address

• server address: rtmp://live-push.bilivideo.com/live-bvc
• key：?streamname=live_xxxx&key=1fbfxxxxxxxxxxxxxffe0&schedule=rtmp&pflag=1

Push stream address: rtmp://live-push.bilivideo.com/live-bvc/?streamname=live_xxxx&key=1fbfxxxxxxxxxxxxxffe0&schedule=rtmp&pflag=1

Run the RTMP client

from maix import camera, time, rtmp, image

cam = camera.Camera(640, 480, image.Format.FMT_YVU420SP)

# rtmp://live-push.bilivideo.com/live-bvc/?streamname=live_xxxx&key=1fbfxxxxxxxxxxxxxffe0&schedule=rtmp&pflag=1
host = 'live-push.bilivideo.com'
port = 1935
app = 'live-bvc'
stream = '?streamname=live_xxxx&key=1fbfxxxxxxxxxxxxxffe0&schedule=rtmp&pflag=1'
bitrate = 1000_000
r = rtmp.Rtmp(host, port, app, stream, bitrate)
r.bind_camera(cam)
r.start()

while True:
    time.sleep(1)

Above get bilibili's push stream address as rtmp://live-push.bilivideo.com/live-bvc/?streamname=live_xxxx&key=1fbfxxxxxxxxxxxxxffe0&schedule=rtmp&pflag=1

Can be detached:

1. server address is live-push.bilivideo.com
2. port is 1935, if there is no port number, the default is 1935
3. application name is live-bvc
4. stream name is ?streamname=live_xxxx&key=1fbfxxxxxxxxxxxxxffe0&schedule=rtmp&pflag=1

Run the code and you will be able to see the maixcam screen in the live stream, if you find that the live stream is not displayed, try to close the live stream first, then reopen it and run the code again.

Try it~!