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• ffmpeg join filter ignores audio of one input

  18 mai 2021, par regstuff

  I'm taking an audio input from a pulseaudio virtual source and trying to combine that with the audio & video of an rtmp input, and the final output goes to another rtmp.

  


  When I try ajoin, as below, I get a message : [Parsed_join_0 @ 0x2cc9100] No channels are used from input stream 1.
The output has audio only from the first source.

  


  PULSE_SOURCE=vmic ffmpeg -f alsa -i pulse -i rtmp://127.0.0.1/server/stream1 -filter_complex "[0:a][1:a]join=inputs=2:channel_layout=stereo[a]" -map "[a]" -map 1:v -vcodec copy -f flv rtmp://127.0.0.1/server/stream2  


  


  Using amerge, as below, however works, though it throws the message : [Parsed_amerge_0 @ 0x38b70c0] No channel layout for input 1
Output has the merged audio.

  


  PULSE_SOURCE=vmic ffmpeg -f alsa -i pulse -i rtmp://127.0.0.1/server/stream1 -filter_complex "[0:a][1:a]amerge=inputs=2[a]" -map "[a]" -acodec aac -ac 2 -b:a 128k -map 1:v -vcodec copy -f flv rtmp://127.0.0.1/server/stream2


  


  FFMPEG documentation however says ajoin should work. Found this SO comment that says ajoin can't do this however.

  


  Any pointers ?

  


  FFMPEG version :

  


  ffmpeg version 4.0.6 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.12) 20160609
  configuration: --prefix=/home/user/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/home/user/ffmpeg_build/include --extra-ldflags=-L/home/user/ffmpeg_build/lib --extra-libs='-lpthread -lm' --enable-gpl --enable-openssl --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libzmq --enable-network --enable-libpulse --enable-nonfree
  libavutil      56. 14.100 / 56. 14.100
  libavcodec     58. 18.100 / 58. 18.100
  libavformat    58. 12.100 / 58. 12.100
  libavdevice    58.  3.100 / 58.  3.100
  libavfilter     7. 16.100 /  7. 16.100
  libswscale      5.  1.100 /  5.  1.100
  libswresample   3.  1.100 /  3.  1.100
  libpostproc    55.  1.100 / 55.  1.100


  


• How to Configure Nginx to serve Multiple Websites

  4 septembre 2020, par lare77

  i use nginx - rtmp option to restream the m3u8 stream with ffmpeg and then play it on the Blog. I have following restream m3u8 from my server, which is playable perfetly in vlc player https://hls.tvoti.com/rtl2/playlist.m3u8
But i can not play it on the website see demo. I use following code in etc/nginx/sites-available to show stream on the websites and is it not correct ? :

  


  server {
    listen   80; 

    #root /var/www/html/; 
    #index index.php index.html index.htm;

    server_name tvoti.com; 

    location / {
    proxy_redirect off; 
        proxy_set_header X-Real-IP  $remote_addr;
        proxy_set_header X-Forwarded-For $remote_addr;
    proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header Host $host;
        proxy_pass http://127.0.0.1:8080;
    }

    location ~ /\.ht {
        deny all;
    }
}

server {
    listen       80;
    server_name  hls.tvoti.com;

    location / {
        add_header Cache-Control no-cache;

    set $cors_origin "https://rtllivestreamkostenlos.com";

    if ($http_origin ~* (^https?://([^/]+\.)*(tvoti|rtllivestreamkostenlos.com)\.com$)) {
            set $cors_origin "$http_origin";
        }

    add_header "X-Dbg" "$cors_origin" always;

        # Simple requests
        if ($request_method ~* "(GET|POST)") {
            add_header "Access-Control-Allow-Origin"  "$cors_origin";
        }

        # Preflighted requests
        if ($request_method = OPTIONS ) {
            add_header "Access-Control-Allow-Origin"  "$cors_origin";
            add_header "Access-Control-Allow-Methods" "GET, POST, OPTIONS, HEAD";
            add_header "Access-Control-Allow-Headers" "Authorization, Origin, X-Requested-With, Content-Type, Accept";
            return 200;
        }
        root   /etc/nginx/hls;
    }

    location /supervisor {
        proxy_pass http://127.0.0.1:9999/;
    }

    #error_page  404              /404.html;

    # redirect server error pages to the static page /50x.html
    #
    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
        root   html;
    }

}


  


• Why is the length of the output video increasing when I overlay an image over a video using ffmpeg ?

  24 août 2020, par Farhan

  ffmpeg -i somevideo.mp4 -i someimage.png -filter_complex "[0:v][1:v] overlay=10:10:enable='between(t,2,4)'" output.mp4


  


  In this case, somevideo.mp4 is a 4 second video. I wanted the last 2 seconds to have the overlay of the someimage.png image. After processing, the length of output.mp4 is 5 seconds. Could someone please help me out on this ? Thank you !

  


  Log for ffprobe of output.mp4

  


  ffprobe version 3.4.8-0ubuntu0.2 Copyright (c) 2007-2020 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, mov,mp4,m4a,3gp,3g2,mj2, from '/ceph/bbb/published/presentation/186b47c6a0cd759032ad555b2704a92a77614607-1598159162249/output.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf57.83.100
  Duration: 00:00:42.04, start: 0.000000, bitrate: 269 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 3360x1080 [SAR 1:1 DAR 28:9], 142 kb/s, 24 fps, 24 tbr, 12288 tbn, 48 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 121 kb/s (default)
    Metadata:
      handler_name    : SoundHandler