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• Pipe Python Script To FFMPEG

  14 juillet 2017, par Go3Team

  I am using the following command that records and segments the video stream from an IP cam :

  ffmpeg -i rtsp://10.0.0.14/live.sdp  -c copy -map 0 -f segment -strftime 1 -segment_time 60 -segment_format mp4 -flags global_header "/rd/out%s.mp4"

  The python script outputs info every 1/4 second that I would like to pipe into the stream as an overlay or subtitle.

  Another question I have that isn’t too important at the moment is when playing back the segmented videos. The timeline on VLC starts at however many minutes into the stream it was recorded. So if it was the 4th video recorded, it starts at 4:00, but the end time is 1:00 which results in the progress bar being all the way over to the right when playing, and makes the video "unseekable(?)".

  Thanks.

• Python script that will take a sequence of images and turn it into a video or gif/animation ?

  6 juillet 2017, par Aang

  I know there are a few questions on this already but I have yet to find a complete solution to this problem. I am writing in Python 2.5 and I want to be able to write a script that will take a sequence of images and turn it into a video or gif/animation.

  I have already tried imageio, image2gif, and opencv. Opencv gives me import errors, imageio only works on Python 2.6+, and image2gif gives me errors when I try to import the PIL or pillow Python library.

  I’ve also looked into FFMPEG. Using the subprocess python module to run FFMPEG through the terminal, I got it to work. However, I am looking for a solution that uses a python library and not an external program such as FFMPEG. Any suggestions ?

• Q : Bash script infinite loop causing ffmpeg spam

  6 juillet 2017, par Kārlis K.

  Can’t seem to figure this one out... I have a set up NGINX server with the excellent RTMP extension and everything is working fine. However, I’m trying to restream/push a copy of a couple specific streams that need to be streamed in another RTMP stream application (specifically, these streams are streamed to application "static" but in the current situation also need to be pushed over to "live"). The process of restreaming/pushing a stream in NGINX-RTMP is relatively simple, however, in my case I need to selectively push a couple of streams instead of every stream being streamed to the application "static".

  Idea is to have NGINX-RTMP pass the stream name off to the bash script, which then does the restreaming without interrupting any other streams or services.

  With some success, I’ve tried doing this by creating a bash scrip..

  The relevant NGINX config bit that runs the bash script is :

  exec_publish /etc/nginx/rtmp_conf.d/stream_id.sh $name;

  I tried it with an "if / else"

  if [ $1 == "stream_name_1" ]; then
  
          ffmpeg -re -i rtmp://127.0.0.1:2000/static/stream_name_1 -vcodec libx264 -acodec copy -f flv rtmp://127.0.0.1:2000/live/live_0
  
  elif [ $1 == "stream_name_2" ]; then
  
          ffmpeg -re -i rtmp://127.0.0.1:2000/static/stream_name_2 -vcodec libx264 -acodec copy -f flv rtmp://127.0.0.1:2000/live/live_1
  
  elif [ $1 == "stream_name_3" ]; then
  
          ffmpeg -re -i rtmp://127.0.0.1:2000/static/stream_name_3 -vcodec libx264 -acodec copy -f flv rtmp://127.0.0.1:2000/live/live_2
  
  elif [ $1 == "stream_name_4" ]; then
  
          ffmpeg -re -i rtmp://127.0.0.1:2000/static/stream_name_4 -vcodec libx264 -acodec copy -f flv rtmp://127.0.0.1:2000/live/live_3
  
  else
  
          echo "FAIL" >> /etc/nginx/rtmp_conf.d/stream.log && echo date > /etc/nginx/rtmp_conf.d/stream.log
  
          exit
  
  fi

  And I tried it with Switches

  case "$1" in
  
          "stream_name_1")
  
              ffmpeg -re -i rtmp://127.0.0.1:2000/static/stream_name_1 -vcodec libx264 -acodec copy -f flv rtmp://127.0.0.1:2000/live/live_0
  
          ;;
  
          "stream_name_2")
  
              ffmpeg -re -i rtmp://127.0.0.1:2000/static/stream_name_2 -vcodec libx264 -acodec copy -f flv rtmp://127.0.0.1:2000/live/live_1
  
          ;;
  
          "stream_name_3")
  
              ffmpeg -re -i rtmp://127.0.0.1:2000/static/stream_name_3 -vcodec libx264 -acodec copy -f flv rtmp://127.0.0.1:2000/live/live_2
  
          ;;
  
          "stream_name_4")
  
              ffmpeg -re -i rtmp://127.0.0.1:2000/static/stream_name_4 -vcodec libx264 -acodec copy -f flv rtmp://127.0.0.1:2000/live/live_3
  
          ;;
  
          echo "FAIL " >> /etc/nginx/rtmp_conf.d/stream.log && echo date > /etc/nginx/rtmp_conf.d/stream.log
  
  esac

  Problem with both is that they both end up spamming a ton of ffmpeg processes ... and I don’t know why - I’ve tried changing the code but I either end up with ffmpeg not firing at all or spamming the server.