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• Unable to record mediasoup producer using FFmpeg on real server

  30 novembre 2020, par Sarvesh Patil

  I have built a nice app in react native for audio calling, many thanks to MediaSoup !!

  


  To take it to next level, I need to record some of my calls.
I used this tutorial for reference :
mediasoup recording demo

  


  I followed the FFmpeg way and have reached a point where I have created a plainTransport with

  


      router.createPlainTransport({
        // No RTP will be received from the remote side
        comedia: false,
        // FFmpeg and GStreamer don't support RTP/RTCP multiplexing ("a=rtcp-mux" in SDP)
        rtcpMux: false,
        listenIp: {ip:"0.0.0.0", announcedIp:"MY_PUBLIC_IP"},
    });



  


  Then I connect to this transport :

  


      rtpPlainTransport.connect({
        ip: 127.0.0.1,
        port: "port1",
        rtcpPort: "port2",
    });



  


  My first doubt : is the ip address in .connect({}) parameters supplied above correct ?

  


  Second, the FFMPEG command requires an SDP header. This is mine :

  


      v=0
    o=- 0 0 IN IP4 127.0.0.1
    s=-
    c=IN IP4 127.0.0.1
    t=0 0
    m=audio port1 RTP/AVPF 111
    a=rtcp:port2
    a=rtpmap:111 opus/48000/2
    a=fmtp:111 minptime=10;useinbandfec=1


  


  When I start recording, the FFMPEG process does not receive any data.
Moreover, on stopping, I get the following message

  


  


  Output file is empty, nothing was encoded (check -ss / -t / -frames
parameters if used) Exiting normally, received signal 2. Recording
process exit, code : 255, signal : null

  


  


  I was able to make the recording save on localhost with 127.0.0.1 when the server was itself running on localhost.

  


  However, with my actual server hosted with Nginx, I'm not able to figure out what is going wrong.

  


  I can see data being sent on my audio port :

  


  1 0.000000000    127.0.0.1 → 127.0.0.1    UDP 117 10183 → 5004 Len=75
2 0.020787740    127.0.0.1 → 127.0.0.1    UDP 108 10183 → 5004 Len=66
3 0.043201757    127.0.0.1 → 127.0.0.1    UDP 118 10183 → 5004 Len=76


  


  What do I do with FFmpeg so that it starts the recording !?

  


  Can someone please help ?

  


• Revision 1c0769107b : vp10 cleanup : remove nonrd and real-time code Code cleanup. Change-Id : I668bd5

  26 août 2015, par Yunqing Wang

  Changed Paths :
   Modify /vp10/encoder/encodeframe.c

  
   Modify /vp10/encoder/encoder.c

  
   Modify /vp10/encoder/ethread.c

  
   Delete /vp10/encoder/pickmode.c

  
   Delete /vp10/encoder/pickmode.h

  
   Modify /vp10/encoder/ratectrl.c

  
   Modify /vp10/encoder/rd.c

  
   Modify /vp10/encoder/rdopt.c

  
   Modify /vp10/encoder/speed_features.c

  
   Modify /vp10/encoder/speed_features.h

  
   Modify /vp10/vp10cx.mk

  
  
  vp10 cleanup : remove nonrd and real-time code

  Code cleanup.

  Change-Id : I668bd5a4e5fbe96969d51d9ee777fc5f1d8abfe6

• Converting series of images with ffmpeg results in black video [migrated]

  27 avril 2013, par Marco Gagliardi

  I've just downloaded ffmpeg since it seems to perfectly match my needs (make a video from a set of pictures). I'm currently playing around with some examples just to get started and there's something weird happening that I can't explain.
  I'm trying this command (provided in the official documentation) :

  ffmpeg -f image2 -pattern_type glob -i 'foo-*.jpeg' -r 12 -s WxH foo.avi

  on a data set of 10 jpg pictures (of course I changed the pattern with '*.jpg'). The video seems to be encoded correctly but it's simply too fast to be sure about that (anyway it stops on the last frame that corresponds to the last picture). In order to get a longer video i thought to low the frame rate from 12 to 1 (one sec each picture) or 0.5 (2 sec each one) and so on.. no way ! with low rate values even if the video is played the pictures are simply not displayed. The player (VLC in my case) just shows a blank/empty video for a few seconds.

  Am I making something wrong or have I misunderstood the -r parameter ? Is it something related to codecs involved ? Finally.. How can i get each picture displayed for 1 or 2 seconds ?

  Here's the output :

  MacBook-Pro$ ffmpeg -f image2 -pattern_type glob -i '*.jpg' -r 1 -s 200x300 foo.avi
  
  ffmpeg version N-52517-g1e4f75d Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Apr 27 2013 19:41:11 with llvm-gcc 4.2.1 (LLVM build 2336.11.00)
  
    configuration: --disable-yasm
  
    libavutil      52. 27.101 / 52. 27.101
  
    libavcodec     55.  6.100 / 55.  6.100
  
    libavformat    55.  3.100 / 55.  3.100
  
    libavdevice    55.  0.100 / 55.  0.100
  
    libavfilter     3. 61.100 /  3. 61.100
  
    libswscale      2.  2.100 /  2.  2.100
  
    libswresample   0. 17.102 /  0. 17.102
  
  Input #0, image2, from '*.jpg':
  
    Duration: 00:00:00.40, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: mjpeg, yuvj422p, 2560x1920 [SAR 1:1 DAR 4:3], 25 fps, 25 tbr, 25 tbn, 25 tbc
  
  File 'foo.avi' already exists. Overwrite ? [y/N] y
  
  Output #0, avi, to 'foo.avi':
  
    Metadata:
  
      ISFT            : Lavf55.3.100
  
      Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 200x300 [SAR 2:1 DAR 4:3], q=2-31, 200 kb/s, 1 tbn, 1 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mjpeg -> mpeg4)
  
  Press [q] to stop, [?] for help
  
  frame=    2 fps=0.0 q=2.0 Lsize=      43kB time=00:00:02.00 bitrate= 177.1kbits/s dup=0 drop=8    
  
  video:38kB audio:0kB subtitle:0 global headers:0kB muxing overhead 15.099197%
  
  MacBook-Pro$