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• How to restart RTMP dump bash script if it closes / dies ?

  9 février 2016, par Shashwat Singh

  I’m using this script to dump a live stream, say "stream1.sh" etc

  #! /bin/bash
  
  function INT_cleanup()
  
  {
  
      kill `jobs -p`
  
      exit
  
  }
  
  
  
  trap INT_cleanup INT
  
  
  
  count=0
  
  while [[ $count < 10 ]] # Try 10 times
  
  do
  
      rtmpdump -r "rtmp://<ipaddress>" -a "live" -f "WIN 11,9,900,117" -W "http://xyz.swf" -p "" -y "xyz" --live | ffmpeg -re -i  - -sn  -vcodec copy -acodec copy -f flv "<ipaddress>" 
  
      count=$((count + 1))
  
  done }
  
  </ipaddress></ipaddress>

  It runs perfectly fine for 3-4 hours then it quits automatically due to packet loss or something, however if I restart it, it again starts working.
  So, What should I do to restart this particular script IF it dies ? Will it require cronjob ? If yes, then please explain how ?

• Using ffmpeg to "re-time" an RTSP stream ?

  29 mars 2021, par Tom S

  I recently set up a birdbox in my garden, and have been using a cheapie camera that I bought, along with ffmpeg on a raspberry pi to stream from the camera to YouTube.

  


  But YouTube keeps telling me that I am sending data too fast - multiple seconds of video per second, and at that point the stream seems to stall and I just get a buffering spinner on YouTube and have to restart ffmpeg to restore the stream.

  


  This is happening very frequently, infact even more frequently now than when I originally got everything up and running for some reason... So much so that Ive had to setup ffmpeg to run as a service, and restart it once an hour via cron. But even this is not enough and now it seems that it can go bonkers within 10-15 minutes of a restart - almost like the more often I restart the quicker it gets...

  


  I dont know where the issue is, or how to find it (does ffmpeg simply restream "verbatim" what ever the camera supplies ?), but I wonder if it might be possible to have ffmpeg re-time the stream so that I only send to YouTube the 25fps that it is happy with (i.e. dropping any frames in excess of this) ?

  


  I have key frames set to 1 second on the camera.

  


  Thanks !

  


  ---

  


  Here is my service file which contains the command that I use to start ffmpeg :

  


  [Unit]
Description=BirbCam 1 streaming service
After=network.target
StartLimitIntervalSec=0

[Service]
Type=simple
Restart=always
RestartSec=1
User=root
# Uncomment one ExecStart line below, then run `sudo systemctl daemon-reload` before restart
# With audio
ExecStart=/usr/local/bin/ffmpeg -rtsp_transport tcp -i rtsp://172.25.144.35:554/user=admin&password=&channel=1&stream=0.sdp?real_stream -tune zerolatency -vcodec libx264 -pix_fmt + -c:v copy -c:a aac -strict experimental -f flv rtmp://a.rtmp.youtube.com/live2/xxxx-xxxx-xxxx-xxxx-xxxx

# Without audio
# ExecStart=/usr/local/bin/ffmpeg -f lavfi -i anullsrc -rtsp_transport tcp -i rtsp://172.25.144.35:554/user=admin&password=&channel=1&stream=0.sdp?real_stream -tune zerolatency -vcodec libx264 -pix_fmt + -c:v copy -c:a aac -strict experimental -f flv rtmp://a.rtmp.youtube.com/live2/xxxx-xxxx-xxxx-xxxx-xxxx

[Install]
WantedBy=multi-user.target


  


• Multimedia Exploration Journal : The Past Doesn’t Die

  12 juillet 2011, par Multimedia Mike — Game Hacking

  New haul of games, new (old) multimedia formats.

  Lords of Midnight
  Check out the box copy scan for Lords of Midnight in MobyGames. In particular, I’d like to call your attention to this little blurb :

  
  
  

  Ahem, "Journey through an immense world — the equivalent of 8 CD-ROMs." Yet, when I procured the game, it only came on a single CD-ROM. It’s definitely a CD-ROM (says so on the disc) and, coming from 1995, certainly predates the earliest DVD-ROMs (which can easily store 8 CD-ROMs on a disc). Thus, I wanted to jump in a see if they were using some phenomenal compression in order to squeeze so much info into 600 or so megabytes.

  I was surprised to see the contents of the disc clocking in at just under 40 megabytes. An intro movie and an outro movie account for 75% of that. Format ? None other than that curious ASCII anomaly, ARMovie/RPL with Escape 122 codec data.

  Cyclemania

  
  
  

  Cyclemania is one of those FMV backdrop action games, but with a motorcycle theme. I had a good feeling I would find some odd multimedia artifacts here and the game didn’t disappoint. The videos are apparently handled using 3-4 discrete files per animation. I’ve documented my cursory guesses and linked some samples at the new MultimediaWiki page.

  Interplay ACMP
  This is unrelated to this particular acquistion, but I was contacted today about audio files harvested from the 1993 DOS game Star Trek : Judgment Rites. The files begin with the ASCII signature "Interplay ACMP Data". This reminds me of Interplay MVE files which begin with the similar string "Interplay MVE File". My theory is that these files use the ACOMP compression format, though I’m still trying to make it fit.

  Wiki and samples are available as usual if you’d like to add your own research.