lctvstream-osx

INRES='1152x720'      # For retina displays
OUTRES="1024x576"     # Livecoding Output Resolution
FPS="15"              # Frame per Seconds (Suggested 24, 25, 30 or 60)
THREADS="3"           # Change this if you have a good CPU (Suggested 4 threads, Max 6 threads)
QUALITY="ultrafast"   # ultrafast, superfast, veryfast, faster, fast, medium, slow, slower, veryslow, placebo
CBR="800k"            # Constant bitrate (CBR) Increase this to get a better pixel quality (1000k - 3000k for twitch)
GOP="30"              # i-frame interval, should be double of FPS,
KEY_FRAME="2"         # Livecoding says it MUST be 2, please do not change it unless you know what you are doing.

ffmpeg -loglevel 40 -thread_queue_size 2048 \
-f avfoundation -framerate $FPS -video_size $INRES -i "1:none" \
-thread_queue_size 2048 -f avfoundation -framerate 30 -video_size "320x240" -i "0:0" -r 10 \
-i "doge.png" -filter_complex \
"[0:v]scale=1024:576,setpts=PTS-STARTPTS[bg]; \
 [1:v]scale=-1:140,setpts=PTS-STARTPTS[fg]; \
 [bg][fg]overlay=W-w-10:10[bg2]; \
 [bg2][2:v]overlay=W-w-0:H-h-0,format=yuv420p[out]" \
-aspect 16:9 -map "[out]" -map 1:a -vcodec libx264 -preset $QUALITY -tune fastdecode \
-force_key_frames "expr:gte(t,n_forced*$KEY_FRAME)" -keyint_min $FPS -g $GOP -crf 27 -maxrate $CBR \
-c:a libmp3lame -b:a 32k -ac 1 -ar 44100 -threads $THREADS -strict normal -bufsize $CBR \
-f flv "rtmp://usmedia3.livecoding.tv:1935/livecodingtv/$API_KEY"