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• no difference between h264 and h264_cuvid

  10 juillet 2020, par Ruslan Ablyazov

  I use libav to decode an RTSP stream. I tried two code options : with auto codec selection and with hardcoded codec.

  


  pCodec = avcodec_find_decoder (pFormatCtx->streams[p_InputVideoStreamIndex]->codecpar->codec_id);&#xA;//pCodec = avcodec_find_decoder_by_name ("h264_cuvid");&#xA;&#xA;LOG (info) &lt;&lt; "Video codec name" &lt;&lt; pCodec->name &lt;&lt; ". Full name:" &lt;&lt; (pCodec->long_name? PCodec->long_name: "<null>");&#xA;</null>

  


  The avcodec_find_decoder() function returns h264 codec. The problem is that the speed and load on the CPU when using h264 is no different from h264_cuvid. What could be the reason ? When I use h264_cuvid, the video card is loaded by 2-3% more.

  


  Video stream : 1920x1080 25 FPS (main and high profile).
Video card : NVIDIA Corporation GP107 [GeForce GTX 1050 Ti] (rev a1).
Processor : Intel (R) Core (TM) i5-8400 CPU @ 2.80GHz.

  


  Compilation config ffmpeg :

  


  ffmpeg version 4.3 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 8 (Debian 8.3.0-6)
  configuration: --enable-gpl --enable-ladspa --enable-libpulse --enable-libsoxr --enable-libspeex --enable-avfilter --enable-avresample --enable-postproc --enable-pthreads --enable -libass --enable-libfreetype --enable-libmp3lame --enable-nonfree --disable-ffplay --enable-libxvid --enable-cuda --enable-cuda-nvcc --enable-cuda-sdk --enable- cuvid --enable-nvenc --enable-nonfree --enable-libnpp --enable-shared --extra-cflags = -I/usr/local/cuda/include --extra-ldflags = -L/usr/local/cuda/lib64


  


• How to : stream with ffmpeg and nginx rtmp, Ubuntu

  3 décembre 2020, par WurmD

  nginx installed with https://nginx.org/en/linux_packages.html in Ubuntu 18.04

  


  sudo apt -y install curl gnupg2 ca-certificates lsb-release ;
echo "deb http://nginx.org/packages/ubuntu `lsb_release -cs` nginx" | sudo tee /etc/apt/sources.list.d/nginx.list ;
curl -fsSL https://nginx.org/keys/nginx_signing.key | sudo apt-key add - ;
sudo apt update ;
sudo apt install nginx ;


  


  nginx up and running

  


  $ ps -aux | grep nginx
root      5602  0.0  0.0  33348   880 ?        Ss   17:03   0:00 nginx: master process nginx
nginx     5603  0.0  0.0  33744  2748 ?        S    17:03   0:00 nginx: worker process


  


  with /etc/nginx/nginx.conf

  


  rtmp {
    server {
        listen 1935;
        chunk_size 4096;

        application live {
            live on;
            record off;
            allow publish 127.0.0.1;
            deny publish all;
        }
    }
}


  


  ffmpeg -f lavfi -i testsrc -t 30 -pix_fmt yuv420p -f flv rtmp://localhost/live/test yields

  


  ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
  configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
Input #0, lavfi, from 'testsrc':
  Duration: N/A, start: 0.000000, bitrate: N/A
    Stream #0:0: Video: rawvideo (RGB[24] / 0x18424752), rgb24, 320x240 [SAR 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
[tcp @ 0x5611668b8c00] Connection to tcp://localhost:1935 failed: Connection refused
[rtmp @ 0x5611668b8520] Cannot open connection tcp://localhost:1935
rtmp://localhost/live: Connection refused


  


  Clue :
Nothing seems to be listening on port 1935. netstat -tap | grep 1935 yields nothing
Clue2 :
Albeit ps shows app as running, systemctl status nginx.service shows app status down

  


  ● nginx.service - nginx - high performance web server
   Loaded: loaded (/lib/systemd/system/nginx.service; enabled; vendor preset: enabled)
   Active: failed (Result: exit-code) since Thu 2020-12-03 19:37:17 CET; 7min ago
     Docs: http://nginx.org/en/docs/
  Process: 5709 ExecStart=/usr/sbin/nginx -c /etc/nginx/nginx.conf (code=exited, status=1/FAILURE)


  


  Things checked given other stackoverflow questions :

  


  

  • trying to connect to rtmp://localhost/live/test and in nginx.conf the application is correctly named live

  


  • nginx.conf correctly placed at /etc/nginx/, no other nginx.conf files exist, and nginx -s reload called to make sure it is loaded

  


  • no localhost instances in the conf file, all renamed to 127.0.0.1

  


  


• asp.net core live mp4 streaming

  8 octobre 2020, par kdma

  Prologue :

  


  I have a hikvision ipcamera that streams raw h264 from a rtsp :// url, I need to play this live feed in the browser.

  


  I managed to get a basic RTSP->ffmpeg-> (faststart) mp4 pipeline working and I can play the video when saved to a file.

  


  I don't understand how to make my controller action "streamable".

  


  I've tried various approaches like writing to Response.Body, Transfer-Encoding : chunked but nothing seems to work.
Here is the basic code :

  


  public IActionResult Play5(){    
      var ms = new MemoryStream();
      var muxer = new RTSPToMp4(ms);
      Task.Run(() => muxer.Stream());
      return new FileStreamResult(ms, "video/mp4");
}


  


  The memory stream contains the live feed but the response is empty here is the request\response from chrome :

  


  Request

  


  method: GET
:path: /api/stream/play5
:scheme: https
accept: */*
accept-encoding: identity;q=1, *;q=0
accept-language: it-IT,it;q=0.9,en-US;q=0.8,en;q=0.7
cache-control: no-cache
pragma: no-cache
range: bytes=0-
referer: https://localhost:5001/Stream
sec-fetch-dest: video
sec-fetch-mode: no-cors
sec-fetch-site: same-origin
user-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.121 Safari/537.36


  


  Response

  


  content-length: 0
content-type: video/mp4
date: Thu, 08 Oct 2020 14:31:06 GMT
server: Kestrel
status: 200


  


  Am I missing something ?