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• Streaming raw h264 video from Raspberry PI to server for capture and viewing [closed]

  24 juin 2024, par tbullers

  This is really an optimization question - I have been able to stream h264 from a raspberry pi 5 to a linux system and capture the streams and save them to .mp4 files.

  


  But I intend to run the video capture and sending on a battery powered Pi Zero 2 W and want to use the least amount of power to maximize battery life and still providing good video quality.

  


  I've explored many different configuration settings but am getting lost in all the options.

  


  This is what I run on the pi :

  


  rpicam-vid -t 30s --framerate 30 --hdr --inline --listen -o tcp://0.0.0.0:5000


  


  I retrieve this video from the more powerful Ubuntu server with :

  


  ffmpeg -r 30 -i tcp://ralph:5000 -vcodec copy video_out103.mp4


  


  It generally works but I receive lots of errors on the server side like this :

  


  [mp4 @ 0x5f9aab5d0800] pts has no valuee= 975.4kbits/s speed=1.19x
Last message repeated 15 times
[mp4 @ 0x5f9aab5d0800] pts has no valuee=1035.3kbits/s speed=1.19x
Last message repeated 15 times
[mp4 @ 0x5f9aab5d0800] pts has no valuee=1014.8kbits/s speed=1.18x
Last message repeated 9 times
[mp4 @ 0x5f9aab5d0800] pts has no valuee=1001.1kbits/s speed=1.17x
Last message repeated 7 times
[mp4 @ 0x5f9aab5d0800] pts has no value
Last message repeated 1 times
[out#0/mp4 @ 0x5f9aab5ad5c0] video:3546kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead : 0.120360%
size= 3550kB time=00:00:27.50 bitrate=1057.5kbits/s speed=1.18x

  


  Any suggestions on how to correct these errors ?

  


  Also any suggestions on how to make the video capture side more efficient ? Should I use a different codec ? (yuv instead of h264 ?) Would using UDP decrease overhead ? Can I improve video quality with the mode or hdr options ? What does denoise do ?

  


  With all the options available with these tools I think it's unlikely that I have a well thought out approach to capture and streaming. I'm hoping that people who are more familiar with this space might be able to provide some suggestions.

  


  Thank you !

  


  -tom

  


• Grow your business and understand your conversion funnel with Funnels for Piwik

  14 décembre 2016, par InnoCraft — Plugins

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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 ?