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Blive with RasperryPi

Reference: Bilibili: 五维谐振子

Qick Start

  1. sudo apt upgrade
  2. sudo apt update
  3. sudo apt install ffmpeg
  5. sudo raspivid -o - -t 0 -w 1280 -h 720 -fps 24 -b 1000000 | ffmpeg -f h264 -i - -vcodec copy -acodec aac -b:a 192k -f flv "你的rtmp地址/你的直播码"

降低延迟:

CSDN: 北雨南萍

  1. sudo raspivid -o - -t 0 -w 1280 -h 720 -fps 24 -b 1000000 |
  2.     ffmpeg -f h264 -i - -vcodec copy -r 30 -acodec aac -b:a 100k -preset ultrafast -tune zerolatency -f flv "你的rtmp地址/你的直播码"

raspivid

树莓派实验室: Spoony

  1. "raspivid" Camera App (commit 06bc6daa0213 Tainted)
  3. Display camera output to display, and optionally saves an H264 capture at requested bitrate
  6. usage: raspivid [options]
  8. Image parameter commands
  10. -b, --bitrate  : Set bitrate. Use bits per second (e.g. 10MBits/s would be -b 10000000)
  11. -t, --timeout  : Time (in ms) to capture for. If not specified, set to 5s. Zero to disable
  12. -d, --demo  : Run a demo mode (cycle through range of camera options, no capture)
  13. -fps, --framerate  : Specify the frames per second to record
  14. -e, --penc  : Display preview image *after* encoding (shows compression artifacts)
  15. -g, --intra  : Specify the intra refresh period (key frame rate/GoP size). Zero to produce an initial I-frame and then just P-frames.
  16. -pf, --profile  : Specify H264 profile to use for encoding
  17. -td, --timed  : Cycle between capture and pause. -cycle on,off where on is record time and off is pause time in ms
  18. -s, --signal  : Cycle between capture and pause on Signal
  19. -k, --keypress  : Cycle between capture and pause on ENTER
  20. -i, --initial  : Initial state. Use 'record' or 'pause'. Default 'record'
  21. -qp, --qp  : Quantisation parameter. Use approximately 10-40. Default 0 (off)
  22. -ih, --inline  : Insert inline headers (SPS, PPS) to stream
  23. -sg, --segment  : Segment output file in to multiple files at specified interval <ms>
  24. -wr, --wrap  : In segment mode, wrap any numbered filename back to 1 when reach number
  25. -sn, --start  : In segment mode, start with specified segment number
  26. -sp, --split  : In wait mode, create new output file for each start event
  27. -c, --circular  : Run encoded data through circular buffer until triggered then save
  28. -x, --vectors  : Output filename <filename> for inline motion vectors
  29. -if, --irefresh  : Set intra refresh type
  30. -fl, --flush  : Flush buffers in order to decrease latency
  31. -pts, --save-pts  : Save Timestamps to file for mkvmerge
  32. -cd, --codec  : Specify the codec to use - H264 (default) or MJPEG
  33. -lev, --level  : Specify H264 level to use for encoding
  34. -r, --raw  : Output filename <filename> for raw video
  35. -rf, --raw-format  : Specify output format for raw video. Default is yuv
  36. -l, --listen  : Listen on a TCP socket
  37. -stm, --spstimings  : Add in h.264 sps timings
  38. -sl, --slices  : Horizontal slices per frame. Default 1 (off)
  41. H264 Profile options :
  42. baseline,main,high
  44. H264 Level options :
  45. 4,4.1,4.2
  47. H264 Intra refresh options :
  48. cyclic,adaptive,both,cyclicrows
  50. Raw output format options :
  51. yuv,rgb,gray
  53. Raspivid allows output to a remote IPv4 host e.g. -o tcp://192.168.1.2:1234or -o udp://192.168.1.2:1234
  54. To listen on a TCP port (IPv4) and wait for an incoming connection use the -l option
  55. e.g. raspivid -l -o tcp://0.0.0.0:3333 -> bind to all network interfaces,
  56. raspivid -l -o tcp://192.168.1.1:3333 -> bind to a certain local IPv4 port
  58. Common Settings commands
  60. -?, --help  : This help information
  61. -w, --width  : Set image width <size>
  62. -h, --height  : Set image height <size>
  63. -o, --output  : Output filename <filename> (to write to stdout, use '-o -'). If not specified, no file is saved
  64. -v, --verbose  : Output verbose information during run
  65. -cs, --camselect  : Select camera <number>. Default 0
  66. -md, --mode  : Force sensor mode. 0=auto. See docs for other modes available
  67. -gps, --gpsdexif  : Apply real-time GPS information to output (e.g. EXIF in JPG, annotation in video (requires libgps.so.23)
  69. Preview parameter commands
  71. -p, --preview  : Preview window settings <'x,y,w,h'>
  72. -f, --fullscreen  : Fullscreen preview mode
  73. -op, --opacity  : Preview window opacity (0-255)
  74. -n, --nopreview  : Do not display a preview window
  75. -dn, --dispnum  : Display on which to display the preview window (dispmanx/tvservice numbering)
  77. Image parameter commands
  79. -sh, --sharpness  : Set image sharpness (-100 to 100)
  80. -co, --contrast  : Set image contrast (-100 to 100)
  81. -br, --brightness  : Set image brightness (0 to 100)
  82. -sa, --saturation  : Set image saturation (-100 to 100)
  83. -ISO, --ISO  : Set capture ISO
  84. -vs, --vstab  : Turn on video stabilisation
  85. -ev, --ev  : Set EV compensation - steps of 1/6 stop
  86. -ex, --exposure  : Set exposure mode (see Notes)
  87. -fli, --flicker  : Set flicker avoid mode (see Notes)
  88. -awb, --awb  : Set AWB mode (see Notes)
  89. -ifx, --imxfx  : Set image effect (see Notes)
  90. -cfx, --colfx  : Set colour effect (U:V)
  91. -mm, --metering  : Set metering mode (see Notes)
  92. -rot, --rotation  : Set image rotation (0-359)
  93. -hf, --hflip  : Set horizontal flip
  94. -vf, --vflip  : Set vertical flip
  95. -roi, --roi  : Set region of interest (x,y,w,d as normalised coordinates [0.0-1.0])
  96. -ss, --shutter  : Set shutter speed in microseconds
  97. -awbg, --awbgains  : Set AWB gains - AWB mode must be off
  98. -drc, --drc  : Set DRC Level (see Notes)
  99. -st, --stats  : Force recomputation of statistics on stills capture pass
  100. -a, --annotate  : Enable/Set annotate flags or text
  101. -3d, --stereo  : Select stereoscopic mode
  102. -dec, --decimate  : Half width/height of stereo image
  103. -3dswap, --3dswap  : Swap camera order for stereoscopic
  104. -ae, --annotateex  : Set extra annotation parameters (text size, text colour(hex YUV), bg colour(hex YUV), justify, x, y)
  105. -ag, --analoggain  : Set the analog gain (floating point)
  106. -dg, --digitalgain  : Set the digital gain (floating point)
  107. -set, --settings  : Retrieve camera settings and write to stdout

python + openCVC + ffmpeg

more: CSDN: mind_programmonkey

基本框架

  1. import cv2 as cv
  2. import subprocess as sp
  4. rtmpUrl = "你的rtmp地址/你的直播码"
  5. camera_path = "/dev/video0"
  6. cap = cv.VideoCapture(camera_path)
  8. ## Get video information
  9. fps = 30 #int(cap.get(cv.CAP_PROP_FPS))
  10. width = int(cap.get(cv.CAP_PROP_FRAME_WIDTH))
  11. height = int(cap.get(cv.CAP_PROP_FRAME_HEIGHT))
  13. ## ffmpeg command
  14. command = ['ffmpeg',
  15.         '-y',
  16.         '-f', 'rawvideo',
  17.         '-vcodec','rawvideo',
  18.         '-pix_fmt', 'bgr24',
  19.         '-s', "{}x{}".format(width, height),
  20.         '-r', str(fps),
  21.         '-i', '-',
  22.         '-c:v', 'libx264',
  23.         '-pix_fmt', 'yuv420p',
  24.         '-preset', 'ultrafast',
  25.         '-f', 'flv',
  26.         rtmpUrl]
  28. ## 管道配置
  29. p = sp.Popen(command, stdin=sp.PIPE)
  31. ## read webcamera
  32. while(cap.isOpened()):
  33.     ret, frame = cap.read()
  34.     if not ret:
  35.         print("Opening camera is failed")
  36.         break
  38.     # process frame
  39.     # your code
  40.     # process frame
  42.     # write to pipe
  43.     p.stdin.write(frame.tostring())

Enjoy~

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