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• How to sync multiple rtsp inputs in ffmpeg ?

  9 décembre 2019, par KOMsandFriends

  I am combining multiple rtsp streams from local network cameras to a single output using ffmpeg. In the resulting video, the videos are out of sync.

  ffmpeg -loglevel warning \
  
          -f image2 -loop 1 \
  
          -i logo.png \
  
          -rtsp_transport tcp -thread_queue_size 1024 \
  
          -i "rtsp://10.0.0.1" \
  
          -rtsp_transport tcp -thread_queue_size 1024 \
  
          -i "rtsp://10.0.0.2" \
  
          -rtsp_transport tcp -thread_queue_size 1024 \
  
          -i "rtsp://10.0.0.3" \
  
          -filter_complex "[3:v][2:v][0:v][1:v]xstack=inputs=4:layout=0_0|w0_0|0_h0|w0_h0[v]" \
  
          -map "[v]" \
  
          -filter_complex "[1:a][1:a]amerge=inputs=2[aout]" -map "[aout]" \
  
          -vcodec libx264 -pix_fmt yuv420p -r 30 -g 60 \
  
          -preset fast -b:v 2400k -maxrate 4600k -bufsize 6000k \
  
          -acodec aac -ar 44100 -b:a 128k \
  
          -f flv "rtmp://live-api-s.facebook.com:80/rtmp/$STREAMKEY"

  If we take the first input (0) (10.0.0.1) as reference, the second input (1) is initially about 1000ms ahead, the third input (2) is about 2000ms ahead. It looks like the offset is even slightly increasing over time.

  I tried to exchange the different inputs (e.g. 10.0.0.3 to input 0, 10.0.0.1 to input 2), then 10.0.0.1 is ahead of 10.0.0.3. So I would assume this is a matter of ffmpeg and how it processes the inputs.

  How could I sync the different sources in the output ?

• How to Configure nginx with stunnel to accept parameters for different FB Live Streams OR rtmps with FFMPEG

  15 septembre 2020, par Yogesh Agarwal

  I want to setup RTMPS and learned that only way around is by using nginx and stunnel. I have the setup and it works with just one configured key.

  



  I have several different keys and all are dynamic. A lot of different urls too.

  



  My Goal is to add a parameter or some way by which i can send the custom url to nginx and it can send to Stunnel, and it can read the custom url and forward the encrypted stream to that url.

  



  I am able to get everything done right via ngnix and stunnel but with preconfigured key only - But i want Dynamic key here.. just like a parameter where you can simply plug and send the stream.

  



  I even tried to set this way.

  



  push rtmp ://127.0.0.1:19350/rtmp/ ;

  



  so i can simple forward the stream to rtmp ://127.0.0.1:19350/rtmp/my-key and it takes my-key and forward the stream via stunnel to facebook. but i cannot get it work.

  



  I am about to bang my heads in walls. Kindly give me some pointers.. I am not sure how to do it via ffmpeg as it says it cannot find rtmps protocol.

  



  My Nginx Config :

  



  # RTMP configuration
rtmp {
    server {
        listen 1935; # Listen on standard RTMP port
        chunk_size 4000;
 # This application is to accept incoming stream
        application live {


                live on; # Allows live input from above
                exec_push rtmp://127.0.0.1:19350/rtmp/$name;
                allow play 127.0.0.1;
                dash on;
                dash_path /var/tmp/dashme;

                hls on; # Enable HTTP Live Streaming
                hls_cleanup on;
                hls_sync 100ms;
                hls_fragment 2s;
                hls_path /var/tmp/live/;


        }


  



  and My Stunnel Config :

  



  setuid = nobody
setgid = nobody
pid=/tmp/stunnel.pid
output = /var/log/stunnel.log
;include = /etc/stunnel/conf.d

[fb-live]
client = yes
accept = 127.0.0.1:19350
connect = live-api-s.facebook.com:443
;verifyChain = no


  


• ffmpeg error SSL routines:ssl3_write_pending:bad write retry

  6 mai 2019, par boygiandi

  Recently, I see this error very often. Does anyone know what the error is and how to fix ? Please check full ffmpeg output here ( I already update openssl latest version from yum )

  ffmpeg version N-93715-gd0e4d04 Copyright (c) 2000-2019 the FFmpeg developers
  
    built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-36)
  
    configuration: --prefix= ....
  
  Input #0, mpegts, from '/tmp/4028813_video_0.ts':
  
    Duration: 00:04:08.19, start: 1.410111, bitrate: 1504 kb/s
  
    Program 1
  
      Metadata:
  
        service_name    : Service01
  
        service_provider: FFmpeg
  
      Stream #0:0[0x100]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(tv, bt709, progressive), 608x1080 [SAR 1:1 DAR 76:135], 30 fps, 30 tbr, 90k tbn, 60 tbc
  
      Stream #0:1[0x101](eng): Audio: aac (LC) ([15][0][0][0] / 0x000F), 44100 Hz, stereo, fltp, 121 kb/s
  
  [ sh: 2019-05-06  9:39:46 ]
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
    Stream #0:1 -> #0:1 (aac (native) -> aac (native))
  
  Press [q] to stop, [?] for help
  
  Output #0, flv, to 'rtmps://live-api-s.facebook.com:443/rtmp/289693778580218?s_bl=1&s_sw=0&s_vt=api-s&a=Abxj1aU9OTqh0RtS':
  
    Metadata:
  
      comment         : gs4028813
  
      encoder         : Lavf58.27.103
  
      Stream #0:0: Video: h264 (High) ([7][0][0][0] / 0x0007), yuv420p(tv, bt709, progressive), 608x1080 [SAR 1:1 DAR 76:135], q=2-31, 3000 kb/s, 30 fps, 30 tbr, 1k tbn, 30 tbc
  
      Stream #0:1(eng): Audio: aac (LC) ([10][0][0][0] / 0x000A), 44100 Hz, stereo, fltp, 128 kb/s
  
      Metadata:
  
        encoder         : Lavc58.52.100 aac
  
  [ sh: 2019-05-06  9:39:47 ]size=     169kB time=00:00:00.52 bitrate=2643.9kbits/s speed=1.03x
  
  ......
  
  [ sh: 2019-05-06  9:40:10 ]size=    3386kB time=00:00:22.72 bitrate=1220.7kbits/s speed=0.999x
  
  [ sh: 2019-05-06  9:40:11 ]size=    3842kB time=00:00:25.32 bitrate=1242.9kbits/s speed=   1x
  
  [tls @ 0x30ab3c0] error:00000000:lib(0):func(0):reason(0)82 bitrate=1247.3kbits/s speed=   1x
  
  av_interleaved_write_frame(): Input/output error
  
  [flv @ 0x3030f80] Failed to update header with correct duration.
  
  [flv @ 0x3030f80] Failed to update header with correct filesize.
  
  Error writing trailer of rtmps://live-api-s.facebook.com:443/rtmp/289693778580218?s_bl=1&s_sw=0&s_vt=api-s&a=Abxj1aU9OTqh0RtS: Input/output error
  
  frame=  776 fps= 30 q=-1.0 Lsize=    3932kB time=00:00:25.82 bitrate=1247.3kbits/s speed=   1x
  
  video:3530kB audio:406kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
  
  [tls @ 0x30ab3c0] error:1409F07F:SSL routines:ssl3_write_pending:bad write retry