├── README.md
└── capture.py


/README.md:
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 1 | # python-ffmpeg-youtube-live
 2 | Simple code to stream from a python program using opencv to Youtube Live using ffmpeg 
 3 | 
 4 | 
 5 | * Run with: 
 6 |  `python capture.py <video path/camera device> <YOUTUBE_KEY>`
 7 | 
 8 | * The python code streams to stdout buffer, which ffmpeg reads in as a pipe input.
 9 | * Change the ffmpeg parameters in the program to suit your requirements
10 | * The `-f lavfi -i anullsrc -acodec libmp3lame -ar 44100` adds dummy audio to be able to stream to YouTube Live. 
11 | * Pipe breaks without the cv2.imencode. I don't fully understand why
12 | 


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/capture.py:
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 1 | import cv2
 2 | import numpy as np 
 3 | import sys
 4 | import subprocess as sp 
 5 | 
 6 | FFMPEG_BIN = "ffmpeg" # on Linux ans Mac OS
 7 | 
 8 | video_path=sys.argv[1]
 9 | youtube_live_key = sys.argv[2]
10 | 
11 | command = [ FFMPEG_BIN,
12 |         '-i', '-', #input from pipe
13 |         '-f', 'lavfi',
14 |         '-i','anullsrc', #Youtube Live needs some audio, so create fake audio src
15 |         '-acodec', 'libmp3lame', 
16 |         '-ar', '44100',
17 |         '-deinterlace', 
18 |         '-vcodec', 'nvenc_h264', #Use libx264 if no nvidia GPU available
19 |         '-pix_fmt', 'yuv420p',
20 |         '-s', '1280x720',
21 |         '-preset', 'ultrafast',
22 |     '-tune', 'fastdecode',
23 |     '-r', '30', #Frame rate
24 |     '-g', '120', 
25 |     '-b:v', '2500k',
26 |     '-threads:6', 
27 |     '-qscale:3',
28 |     '-b:a:712000',
29 |     '-buffsize:512k',
30 |     '-f' , 'flv',
31 |     'rtmp://a.rtmp.youtube.com/live2/{}'.format(youtube_live_key),
32 |         ]
33 | 
34 | pipe = sp.Popen( command, stdin=sp.PIPE, stderr=sp.PIPE)
35 | 
36 | cap = cv2.VideoCapture(video_path)
37 | ret2=True   
38 | i=1
39 | ret=None
40 | frame=None
41 | while True:
42 |     ret, frame = cap.read()
43 |     if ret:
44 |         ret2,frame_out = cv2.imencode('.jpg',frame) #Breaks without this for some reason
45 |         if ret2:
46 | 	        pipe.stdin.write( frame_out.tobytes() )
47 |             
48 | 


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