Vagrant twitch about multi-streaming-server HOT 3 CLOSED

Hello,

If you also use FFMpeg to encode your stream to Twitch (like in the default configuration of this project), you can specify the keyframe using some additional paramaters:

-x264-params keyint=60:no-scenecut=1

The value of keyint should be the max keyframe you want * FPS. So for a max keyinterval of 2 and with a stream locked to 30 FPS, the value of keyint will be 2 * 30 = 60.

(source)

Same thing to use a constant bitrate, you need to use a new parameter:

-x264opts bitrate=3500:vbv-maxrate=3500:vbv-bufsize=116

• vbv-maxrate = bitrate = B = target bitrate
• vbv-bufsize = B / fps (in this video's case that's 30 fps)

(source)

At the end, you should have something like that in your Nginx configuration file:

exec ffmpeg -i rtmp://localhost/$app/$name -c:v libx264 -preset veryfast -c:a copy 
    -b:v 3500k 
    -bufsize 3500k
    -maxrate 3500k 
    -s 1280x720 -r 30
    -x264-params keyint=60:no-scenecut=1:bitrate=3500:vbv-maxrate=3500:vbv-bufsize=116
    -f flv rtmp://localhost/twitch/$name;

I didn't test the solutions here and I'm not an expert of FFMpeg. I advise you to look at the FFMpeg official documentation if you still have some problems with your stream encoding.

Let me know if it works as expected ;)

from multi-streaming-server.

Thanks so much. After updating the config the twitch account showed excellent at first connection. After I refreshed the page, this changed to acceptable and listed the same issues (CBR not constant, Keyframe 8). I don't understand..

from multi-streaming-server.

Here is a screenshot of the twitch video statistics directly:

I have both my original feed from OBS and the Vagrant config set to 30fps, not 60. I noticed that today, as well.

from multi-streaming-server.