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• nginx.conf with RTMP module : Add watermark on MULTIPLE video streams withh ffmpeg

  16 mai 2023, par Frederick Eyland

  I need to add a watermark in nginx.conf on all my output streams. This is what I found from the documentation from ffmpeg but it is not working.

  



  exec ffmpeg -i rtmp://localhost/$app/$name -i /mnt/pictures/flowtech.png -filter_complex "overlay=10:10,split=5[out1][out2][out3][out4][out5]"
-map '[out1]' -map 0:a -c:v libx264 -c:a aac -ac 1 -strict -2 -b:v 256k -b:a 32k -vf "scale=480:trunc(ow/a/2)*2" -tune zerolatency -preset veryfast -crf 23 -f flv rtmp://localhost/hlsall/$name_low
-map '[out2]' -map 0:a -c:v libx264 -c:a aac -ac 1 -strict -2 -b:v 768k -b:a 96k -vf "scale=720:trunc(ow/a/2)*2" -tune zerolatency -preset veryfast -crf 23 -f flv rtmp://localhost/hlsall/$name_mid
-map '[out3]' -map 0:a -c:v libx264 -c:a aac -ac 1 -strict -2 -b:v 1024k -b:a 128k -vf "scale=960:trunc(ow/a/2)*2" -tune zerolatency -preset veryfast -crf 23 -f flv rtmp://localhost/hlsall/$name_high
-map '[out4]' -map 0:a -c:v libx264 -c:a aac -ac 1 -strict -2 -b:v 1920k -b:a 128k -vf "scale=1280:trunc(ow/a/2)*2" -tune zerolatency -preset veryfast -crf 23 -f flv rtmp://localhost/hlsall/$name_hd720
-map '[out5]' -map 0:a -c copy -f flv rtmp://localhost/hlsall/$name_src 1>>/tmp/rtmp_log;


  


• Processing Camera stream in Opencv, pushing it over RTMP (NGINX RTMP Module) using FFMPEG

  12 août 2019, par Asymptote

  Output video :
  https://youtu.be/VxfoBQjoY6E

  Explanation :

  I want to : Process camera stream in Opencv and push it over to RTMP server. I already have NGINX (RTMP module) set up and I have tested streaming videos with both RTMP (Flash Player) and HLS.

  I am reading the frames in a loop and using ’subprocess’ in python to execute ffmpeg command. Here’s the command I am using :

  command = [ffmpeg,
  
      '-y',
  
      '-f', 'rawvideo',
  
      '-vcodec','rawvideo',
  
      '-pix_fmt', 'bgr24',
  
      '-s', dimension,
  
      '-i', '-',
  
      '-c:v', 'libx264',
  
      '-pix_fmt', 'yuv420p',
  
      '-preset', 'ultrafast',
  
      '-f', 'flv',
  
      'rtmp://10.10.10.80/live/mystream']
  
  
  
  
  
  import subprocess as sp
  
  ...
  
  proc = sp.Popen(command, stdin=sp.PIPE,shell=False)
  
  ...
  
  proc.stdin.write(frame.tostring()) #frame is read using opencv

  Problem :

  I can see the stream fine but it freezes and resumes frequently. Here’s the output of FFMPEG terminal log :

  Stream mapping:
  
    Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
  
  frame=  117 fps= 16 q=22.0 size=     344kB time=00:00:04.04 bitrate= 697.8kbits/s speed=0.543x   

  It mentions speed at the end. I believe it should be close to 1x. I am not sure how to achieve that.

  And I am on the same network as server, I can post my python code if required. Need some ffmpeg guru to give me some advise.

  EDIT

  My input fps is actually 3.
  With '-use_wallclock_as_timestamps', '1' I can see in the log that speed is close to 1x.
  But HLS is not streaming live there’s 2 min delay, it halts and . Chris’s advise partially worked. I am not sure where exactly is the problem, I am starting to believe it has something to do with nginx-rtmp module.

  Here’s the final output, on left it’s flash and on right it’s hls. I am showing the ffmpeg options at the end.
  https://youtu.be/jsm6XNFOUE4

• avformat/options_table : Change the seek2any location in opt table.

  1er avril 2018, par Jun Zhao

  avformat/options_table : Change the seek2any location in opt table.
  Change the seek2any location in avformat_options to make code more
  
  readable.
  Signed-off-by : Jun Zhao <mypopydev@gmail.com>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavformat/options_table.h