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• Streaming low latency video

  26 août 2018, par user4893295

  Goal is to get low latency HD video over the LAN from a USB camera on a ARM device (a10 Lime running Armbian Jessie) to OBS Studio.

  Thinking first step is to at least get it viewable on VLC on another device. So, to that end, I have tried gstreamer (no joy), ffmpeg (same) and VLC. Best luck with VLC so far, but the picture is mostly blank with occasional spots of picture.

  This is the command I’m using :

  cvlc v4l2:///dev/video0:chroma=h264:width=1920:height=1080 --sout '#standard{access=http,mux=ts,dst=0.0.0.0:8080/stream,name=stream,mime=video/ts}' -vvv

  It moans a bit at first with

  [00b4a178] core interface error: no suitable interface module
  
  [00ab18f8] core libvlc error: interface "globalhotkeys,none" initialization failed
  
  [00b4a178] core interface debug: looking for interface module matching "dbus,none": 18 candidates
  
  [00b4a178] dbus interface error: Failed to connect to the D-Bus session daemon: Unable to autolaunch a dbus-daemon without a $DISPLAY for X11
  
  [00b4a178] core interface debug: no interface modules matched
  
  [00b4a178] core interface error: no suitable interface module
  
  [00ab18f8] core libvlc error: interface "dbus,none" initialization failed

  But then seems to get a bit happier

  [b4316038] core demux meta debug: no meta reader modules matched
  
  [b4300508] core input debug: `v4l2:///dev/video0:chroma=h264:width=1920:height=1080' successfully opened
  
  [b4300508] core input debug: Buffering 0%
  
  [b4300508] core input debug: switching to sync mode
  
  [b430cce8] packetizer_h264 decoder debug: found NAL_SPS (sps_id=0)
  
  [b430cce8] packetizer_h264 decoder debug: found NAL_PPS (pps_id=0 sps_id=0)
  
  [b4300508] core input debug: Buffering 10%
  
  [b43041a0] core stream output debug: adding a new sout input (sout_input:0xb49004f0)
  
  [b43060f8] core mux debug: adding a new input
  
  [b43060f8] mux_ts mux debug: adding input codec=h264 pid=68
  
  [b43060f8] mux_ts mux debug: new PCR PID is 68
  
  [b4300508] core input debug: Buffering 32%
  
  [b4300508] core input debug: Buffering 44%
  
  [b4300508] core input debug: Buffering 55%
  
  [b4300508] core input debug: Buffering 65%
  
  [b4300508] core input debug: Buffering 77%
  
  [b4300508] core input debug: Buffering 88%
  
  [b4300508] core input debug: Buffering 98%
  
  [b4300508] core input debug: Stream buffering done (332 ms in 331 ms)
  
  [b4300508] core input debug: Decoder wait done in 0 ms

  And I can connect to it from VLC, but the picture looks like

  

  Processor peaks at around 17% and memory even less than that, so it’s not that.

  Any suggestions ?

• ffmpeg posting to nginx hangs after 90 minutes

  22 octobre 2018, par Harnek Gulati

  I’m using a very simple program to push an ffmpeg stream from my raspberry pi camera to a nginx server. However, it fails after 90 minutes, with almost every single Raspberry Pi I use (I have this code on 12 Raspberry Pis).
  Here is my ffmpeg command :

  raspivid -o - -t 0 -w 640 -h 480 -fps 25 | ffmpeg -re -i - -vcodec copy -hls_time 4 -f hls -hls_list_size 5 -hls_wrap 5 -threads 0  -timeout 5000 -max_reload 20000 -method PUT http://{}:{}/live/{}

  And here is my configuration for nginx.conf :

  #user nobody;
  
  load_module /usr/lib/nginx/modules/ndk_http_module.so;
  
  load_module /usr/lib/nginx/modules/ngx_http_lua_module.so;
  
  
  
  worker_processes auto;
  
  env CONTROL_SERVER_IP;
  
  
  
  
  
  #error_log /var/log/nginx/error.log;
  
  error_log /dev/stdout info;
  
  events {
  
      worker_connections 1024;
  
  }
  
  
  
  http {
  
      include     mime.types;
  
      default_type    application/octet-stream;
  
      access_log /dev/stdout;
  
      sendfile on;
  
      keepalive_requests 100000;
  
      keepalive_timeout 30;
  
  
  
    client_max_body_size 10M;
  
    server {
  
      listen 80;
  
      server_name localhost;
  
  
  
      location /live {
  
        root /var/static;
  
              client_body_temp_path   /var/static/client_temp;
  
  
  
              dav_methods PUT;
  
              create_full_put_path on;
  
              dav_access user:rw  group:r     all:r;
  
  
  
              types {
  
                  application/vnd.apple.mpegurl m3u8;
  
              }
  
  
  
              # Disable Cache
  
              add_header Cache-Control no-cache;
  
              include cors.conf;
  
    }
  
    }
  
  }
  
  
  
  daemon off;

  If anyone can help me, I would deeply appreciate it. I’ve been pulling my hair out trying to figure out this bug. On the raspberry pi, it hangs on this :

  [hls @ 0x25a8c90] Opening 'http://192.168.8.1:80/live/c35d8935-0a31-4d22-b71a-ad3f4f1d47631.ts' for writing
  
  frame=105609 fps= 25 q=-1.0 q=1.6 size=N/A time=01:11:40.00 bitrate=N/A dup=0 drop=105518 speed=1.02xframe=105623 fps= 25 q=-1.0 q=1.6 size=N/A time=01:11:40.00 bitrate=N/A dup=0 drop=105532 speed=1.02xframe=105636 fps= 25 q=-1.0 q=1.6 size=N/A time=01:11:40.00 bitrate=N/A dup=0 drop=105545 speed=1.02xframe=105648 fps= 25 q=-1.0 q=1.6 size=N/A time=01:11:40.00 bitrate=N/A dup=0 drop=105557 speed=1.02xframe=105662 fps= 25 q=-1.0 q=1.6 size=N/A time=01:11:40.00 bitrate=N/A dup=0 drop=105571 speed=1.02xframe=105674 fps= 25 q=-1.0 q=1.6 size=N/A time=01:11:40.00 bitrate=N/A dup=0 drop=105583 speed=1.02xframe=105688 fps= 25 q=-1.0 q=1.6 size=N/A time=01:11:40.00 bitrate=N/A dup=0 drop=105597 speed=1.02xframe=105700 fps= 25 q=-1.0 q=1.6 size=N/A time=01:11:40.00 bitrate=N/A dup=0 drop=105609 speed=1.02xframe=105714 fps= 25 q=-1.0 q=1.6 size=N/A time=01:11:40.00 bitrate=N/A dup=0 drop=105623 speed=1.02x[hls muxer @ 0x25a9200] Duplicated segment filename detected: c35d8935-0a31-4d22-b71a-ad3f4f1d47631.ts
  
  [hls @ 0x25a8c90] Opening 'http://192.168.8.1:80/live/c35d8935-0a31-4d22-b71a-ad3f4f1d47632.ts' for writing

  And on the nginx logs, I get :

  192.168.10.242 - - [21/Oct/2018:22:34:01 +0000] "PUT /live/c35d8935-0a31-4d22-b71a-ad3f4f1d4763.m3u8 HTTP/1.1" 204 0 "-" "Lavf/57.83.100"
  
  192.168.10.242 - - [21/Oct/2018:22:35:04 +0000] "PUT /live/c35d8935-0a31-4d22-b71a-ad3f4f1d47633.ts HTTP/1.1" 408 0 "-" "Lavf/57.83.100"

  I need to set up a way to either a) keep consistent connections longer than 90 minutes or b) detect when the 408 error happens and stop it from hanging.

  FFMPEG version : 3.4.1

• Nginx not starting after changing config file for live streaming purpose (Windows 10)

  2 décembre 2018, par Mohammad Ali Zinnah

  When I run the nginx.exe then it start a black screen and stay that

  Black Screen show

  I am new to nginx and ffmpeg

  I am tring it but failed

  Windows 10

  nginx 1.7.11.3 Gryphon.zip

  I Tried in cmd nginx -t and get positive

  Here is my config file

  daemon off;
  
  
  
  error_log logs/error.log debug;
  
  
  
  events {
  
      worker_connections 1024;
  
  }

  RTMP Server and Transcoding

  rtmp {
  
      server {
  
          listen 1935;
  
          chunk_size 4000;
  
  
  
          application stream {
  
              live on;
  
  
  
              exec ffmpeg -i rtmp://localhost:1935/stream/$name
  
                -c:a libfdk_aac -b:a 128k -c:v libx264 -b:v 2500k -f flv -g 30 -r 30 -s 1280x720 -preset superfast -profile:v baseline rtmp://localhost:1935/hls/$name_720p2628kbs
  
                -c:a libfdk_aac -b:a 128k -c:v libx264 -b:v 1000k -f flv -g 30 -r 30 -s 854x480 -preset superfast -profile:v baseline rtmp://localhost:1935/hls/$name_480p1128kbs
  
                -c:a libfdk_aac -b:a 128k -c:v libx264 -b:v 750k -f flv -g 30 -r 30 -s 640x360 -preset superfast -profile:v baseline rtmp://localhost:1935/hls/$name_360p878kbs
  
                -c:a libfdk_aac -b:a 128k -c:v libx264 -b:v 400k -f flv -g 30 -r 30 -s 426x240 -preset superfast -profile:v baseline rtmp://localhost:1935/hls/$name_240p528kbs
  
                -c:a libfdk_aac -b:a 64k -c:v libx264 -b:v 200k -f flv -g 15 -r 15 -s 426x240 -preset superfast -profile:v baseline rtmp://localhost:1935/hls/$name_240p264kbs;
  
          }
  
  
  
          application hls {
  
              live on;
  
              hls on;
  
              hls_fragment_naming system;
  
              hls_fragment 5s;
  
              hls_path /opt/data/hls;
  
              hls_nested on;
  
  
  
              hls_variant _720p2628kbs BANDWIDTH=2628000,RESOLUTION=1280x720;
  
              hls_variant _480p1128kbs BANDWIDTH=1128000,RESOLUTION=854x480;
  
              hls_variant _360p878kbs BANDWIDTH=878000,RESOLUTION=640x360;
  
              hls_variant _240p528kbs BANDWIDTH=528000,RESOLUTION=426x240;
  
              hls_variant _240p264kbs BANDWIDTH=264000,RESOLUTION=426x240;
  
          }
  
      }
  
  }
  
  
  
  **HTTP Server**
  
  
  
  http {
  
      server {
  
          listen 80;
  
  
  
          location /hls {
  
              types {
  
                  application/vnd.apple.mpegurl m3u8;
  
                  video/mp2t ts;
  
              }
  
              root /opt/data;
  
              add_header Cache-Control no-cache;
  
              add_header Access-Control-Allow-Origin *;
  
          }
  
  
  
          location /live {
  
            alias /opt/data/hls;
  
            types {
  
                application/vnd.apple.mpegurl m3u8;
  
                video/mp2t ts;
  
            }
  
            add_header Cache-Control no-cache;
  
            add_header Access-Control-Allow-Origin *;
  
          }
  
  
  
          location /stat {
  
              rtmp_stat all;
  
              rtmp_stat_stylesheet static/stat.xsl;
  
          }
  
  
  
          location /static {
  
              alias /www/static;
  
          }
  
  
  
          location = /crossdomain.xml {
  
              root /www/static;
  
              default_type text/xml;
  
              expires 24h;
  
          }
  
      }
  
  }

  I copied this file from internet so feel free to advice me to edit file
  I dont no what my error is . Please Help me