[FFmpeg-user] Bitrate won't change

Simon Brown simon.k.brown at gmail.com
Mon Dec 18 19:10:22 EET 2017

> Here's my command line:
> ffmpeg -f lavfi -i anullsrc -rtsp_transport tcp -thread_queue_size 512 -i
> rtsp://admin:password@xx.xx.xx.xxx/544/h264/ch1/main/av_stream -tune
> zerolatency -vcodec libx264 -preset slower  -x264opts
> bitrate=2500:vbv-maxrate=2500:vbv-bufsize=166  -g 120 -pix_fmt yuv420p+
> -c:v copy -c:a aac -strict experimental -b:a 128k  -f flv rtmp://
> a.rtmp.youtube.com/live2/my_youtube_key
> Unless I'm much mistaken you have -c:v copy which implies it's not going
to change the video bit rate at all - it's just copying the video stream.

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