Raspberry Pi/Camera streaming

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  • latency increases strongly when vlc or cvlc is used

direct udp stream

  • Raspi with camera
raspivid -a 12 -t 0 -w 1280 -h 720 -hf -ih -fps 30 -o udp://192.168.1.10:5000

-a 12        # annotate
-t 0         # timeout disabled (default=5s)
-w 1280      # width
-h 720       # height
-hf          # horizontal flip
#-vf         # vertical flip
-ih          # insert inline headers to stream
-fps 30      # frames per second
-0 udp://192.168.1.10:5000    # send stream to ip:port
  • Raspi with monitor
omxplayer --win 0,0,800,480 udp://@:5000

-win 0,0,800,480    # position of video window


direct tcp stream

  • Raspi with camera
raspivid -a 12 -t 0 -w 1280 -h 720 -vf -ih -fps 30 -l -o tcp://0.0.0.0:5000
  • Raspi with monitor
omxplayer --win 0,0,800,480 tcp://192.168.1.20:5000
  • vlc with monitor
tcp/h264://192.168.1.20:5000

direct tcp stream with netcat

  • Raspi with camera
raspivid -a 12 -t 0 -w 1920 -h 1080 -vf -ih -fps 25 -l -o - | nc -k -l 5000
  • PC with monitor
mplayer -x 1280 -y 720 -geometry 0:0 -fps 200 -demuxer h264es -noborder ffmpeg://tcp://192.168.111.173:5000

rtsp stream (big latency)

  • Raspi with camera
raspivid -t 0 -n -b 1000000 -g 30 -ih -pf baseline -w 640 -h 480 -fps 30 -o - | cvlc -v stream:///dev/stdin --sout '#rtp{sdp=rtsp://:8554/}' :demux=h264
  • Raspi with monitor
omxplayer --win 0,0,800,480 rtsp://192.168.1.20:8554/
  • vlc with monitor
rtsp://192.168.111.182:8554/

dual output (direct low latency + rtsp big latency)

  • Raspi with camera
mkfifo video.stream
raspivid -a 12 -t 0 -w 1280 -h 720 -hf -ih -fps 30 -o - | tee video.stream | cvlc -v stream:///dev/stdin --sout '#rtp{sdp=rtsp://:8554/}' :demux=h264 | nc 192.168.1.20 5000 < video.stream
  • Raspi with monitor
mkfifo video.stream
nc -l -p 5000 > video.stream | omxplayer --win 0,0,800,480 video.stream

gstreamer

  • apt install gstreamer1.0-tools gstreamer1.0-plugins-bad gstreamer1.0-plugins-good gstreamer1.0-libav
  • Raspi with camera (test)
raspivid -n -w 1280 -h 720 -b 4500000 -fps 30 -vf -hf -t 0 -o - | gst-launch-1.0 -v fdsrc !  h264parse ! tee name=splitter ! queue ! rtph264pay config-interval=10 pt=96 ! udpsink host=192.168.1.101 port=9000 splitter. ! queue ! filesink location="videofile.h264"
  • Raspi with monitor (test)
gst-launch-1.0 -v udpsrc port=9000 caps='application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)H264' ! rtph264depay ! avdec_h264 ! videoconvert ! autovideosink sync=false

Resolutions

  • 1920 x 1080
  • 1296 x 972 (full view)
  • 1270 x 720


Links