Use FFmpeg rtmp streaming in macOS

bilibili.sh

#! /bin/bash
#
# Diffusion bilibili live avec ffmpeg
# Make sure you have FFmpeg installed in your mac

# list avfoundation devices
ffmpeg -f avfoundation -list_devices true -i ""

# change the param after `-i` and `-f flv`

# use 140m mermory
ffmpeg \
  -f avfoundation \
  -re -i "2" \
  -vcodec libx264 \
  -preset ultrafast \
  -acodec aac \
  -ar 44100 \
  -ac 1 \
  -f flv "rtmp://example.com/path?key=xx"

# 560m mermory 90% cpu
ffmpeg \
  -f avfoundation \
  -video_size 1920x1080 \
  -framerate 30 \
  -i "2:0" -ac 2 \
  -vcodec libx264 -maxrate 2000k \
  -bufsize 2000k -acodec libmp3lame -ar 44100 -b:a 128k \
  -f flv "rtmp://example.com/path?key=xx"

不行，直播间一直转圈圈，黑屏。

1. frame= 149 fps=3.6 q=14.0 size= 14235kB time=00:00:38.53 bitrate=3026.2kbits/s speed=0.919x
   frame= 384 fps=5.6 q=8.0 size= 22174kB time=00:01:05.60 bitrate=2769.0kbits/s speed=0.962x
2. frame= 659 fps= 26 q=30.0 size= 3231kB time=00:00:25.70 bitrate=1030.0kbits/s speed=1.01x
   frame= 931 fps= 27 q=29.0 size= 4681kB time=00:00:35.16 bitrate=1090.4kbits/s speed=1.01x