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• How to stream RPI a RPI Cam with ffmpeg for 24/7 to youtube stable and reliable

  6 mai 2021, par John Paden

  As a part of a project to bird-watch, I use RPICam
(https://github.com/silvanmelchior/RPi_Cam_Web_Interface)
on an Pi4. Resolution is 854x480, 25 fps. Works fine, stable 24/7.

  


  To share the videos not only in the intranet but on youtube, I use ffmpeg.
Other infrastructure : 1GBLAN, high speed extenal network connection, pi has stable power supply (no yellow flashes).

  


  After a lot of reading and testing, this command line produces a bitrate of about 2500 kbits and a speed of 1.

  


  ffmpeg -hide_banner -i http://xx.xx.xx.xx/cam_pic_new.php -deinterlace -re -acodec pcm_s16le -ac 2 -f s16le -i /dev/zero -f h264_omx -c:a aac -ar 48000 -ac 2 -b:a 384k -c:v h264_omx -b:v 2.5M -profile:v high -force_key_frames "expr:gte(t,n_forced/2)" -s 854x480 -pix_fmt yuv420p -strict experimental -use_editlist 0 -movflags +faststart -f flv rtmp ://a.rtmp.youtube.com/live2/xxx-xxx-xxx-xxx-xxx

  


  IF it starts correctly. As Youtube rules suggest to limit streams to under 24h to keep them, a regular reset of the tream - or the pi - is required.
On the youtube side this is controlled by
Often a restart (no matter of a "sudo restart" or just a restart of the ffmpeg command) results in youtube studio showing a green button (Stream status very good) and a second green button (Very good connection). But instead, the circle turns around ongoingly and it states 'Streaming Software can be connected now, viewers can find the stream once it has started'.
In short - how does youtube understand to start the transmission, or to reset if it still some sort of busy ?

  


• Broadcasting to youtube live via rtmp using VLC from terminal

  10 novembre 2016, par devprashant

  When running :

  cvlc -vvv 'Bootstrap Tutorial.mp4' --sout 
  
  '#rtp{dst=rtmp://a.rtmp.youtube.com/live2,name=pa1p-8c4m-zzvp-5j6t,mux=ts}'

  I get the following debugging log : http://www.wepaste.com/vlcdebug/

  when additionally specifying the access method :

  cvlc -vvv 'Bootstrap Tutorial.mp4' --sout 
  
  '#std{access=rtmp,dst=rtmp://a.rtmp.youtube.com/live2/pa1p-8c4m-zzvp-5j6t,mux=ts}'  

  I get the following debugging log : http://www.wepaste.com/vlcdebug2/

  How do I stream live video and audio to youtube using VLC from terminal.

  Resources I looked into :

  1. https://blog.vucica.net/2015/08/streaming-to-youtube-live-with-vlc-and-ffmpeg.html
  2. https://forum.videolan.org/viewtopic.php?f=14&t=130520&p=436913&hilit=rtmp+youtube#p436913
  3. Problems Starting VLC HTTP Stream with Servlet
  4. https://forum.videolan.org/viewtopic.php?f=4&t=112221&p=380232&hilit=rtmp+youtube#p380232

• ffmpeg_hw : make hardware selection for filters more user friendly

  29 juin 2021, par Haihao Xiang

  ffmpeg_hw : make hardware selection for filters more user friendly
  When a device is derived from a source device, there are at least 2
  
  devices, and usually the derived device is the expected device, so let's
  
  pick the last device if user doesn't specify the filter device with
  
  filter_hw_device option
  After applying this patch, the command below can work :
  $> ffmpeg -init_hw_device vaapi=va :/dev/dri/renderD128 -init_hw_device
  
  qsv=hw@va -f lavfi -i yuvtestsrc  -vf
  
  format=nv12,hwupload=extra_hw_frames=64 -c:v h264_qsv -y out.h264
  Reviewed-by : Soft Works <softworkz@hotmail.com>
  
  Signed-off-by : James Almer <jamrial@gmail.com>
  

  • [DH] fftools/ffmpeg_hw.c