Twitch streaming with FFMPEG: Bitrate issue

Other Questions Twitch
1

I’m having trouble with my Twitch stream using FFMPEG. My Python script generates video frames, but the stream’s bitrate is really low (about 70 KB) even though I set it to 3000K in FFMPEG.

Here’s what I’m doing:

import cv2
import subprocess as sp

stream_key = 'MY_KEY'
video_file = 'input.mp4'

vid = cv2.VideoCapture(video_file)
success, img = vid.read()
h, w, _ = img.shape

fps = vid.get(cv2.CAP_PROP_FPS)

ffmpeg_cmd = [
    'ffmpeg',
    '-f', 'rawvideo',
    '-pix_fmt', 'rgb24',
    '-s', f'{w}x{h}',
    '-r', str(fps),
    '-i', '-',
    '-c:v', 'libx264',
    '-b:v', '3000k',
    '-preset', 'faster',
    '-f', 'flv',
    f'rtmp://twitch.tv/app/{stream_key}'
]

process = sp.Popen(ffmpeg_cmd, stdin=sp.PIPE)

while True:
    success, img = vid.read()
    if not success:
        break
    process.stdin.write(img.tobytes())

vid.release()
process.stdin.close()
process.wait()

Any ideas on how to fix the bitrate? Or maybe there’s a better way to stream to Twitch using Python? Thanks!

2

hey there! i’ve had similar issues b4. have u tried adjusting the ‘-maxrate’ and ‘-bufsize’ parameters in ur ffmpeg command? somthing like ‘-maxrate 3000k -bufsize 6000k’ might help. also, check ur network connection - sometimes that can mess with bitrates. good luck!