Sur d’autres sites (11424)

• x264enc not respecting timestamps

  23 mai 2015, par Austin A.

  I am trying to write a gstreamer pipeline to read video from a FIFO on disk as raw 720p RGB images, then encode the frames using x264, and save an .mkv file to disk. Here is my current pipeline :

  gst-launch-1.0 --eos-on-shutdown -v \
  
      filesrc location="/path/to/fifo_name" do-timestamp=true \
  
      ! videoparse format="GST_VIDEO_FORMAT_RGB" width="1280" height="720" \
  
        framerate="2997/100" \
  
      ! videoconvert \
  
      ! "video/x-raw, format=(string)I420, width=(int)1280,\
  
        height=(int)720" \
  
      ! videorate \
  
      ! "video/x-raw,framerate=(fraction)2997/100" \
  
      ! x264enc \
  
      ! matroskamux name=mux \
  
      ! filesink location=/path/to/output.mkv sync=false

  The frames are normally pushed onto the fifo at a regular rate (29.97 fps), but sometimes there will be a dropped frame or two, so there might be a delay of 66ms or 100ms between adjacent frames instead of the regular 33ms. However, the x264enc element is not respecting those timestamps, because it gives each frame the same 33ms duration, and skips over those dropped frames without the appropriate delay. This makes the video play back faster than expected.

  To test that this was indeed the x264enc element causing issues, I tried skipping the encoder and just showing the result in a display, and this puts the correct delays into the video :

  gst-launch-1.0 --eos-on-shutdown -v \
  
      filesrc location="/path/to/fifo_name" do-timestamp=true \
  
      ! videoparse format="GST_VIDEO_FORMAT_RGB" width="1280" height="720" \
  
        framerate="2997/100" \
  
      ! videoconvert \
  
      ! "video/x-raw, format=(string)I420, width=(int)1280,\
  
        height=(int)720" \
  
      ! videorate \
  
      ! "video/x-raw,framerate=(fraction)2997/100" \
  
      ! xvimagesink sync=false

  So, something about the x264 encoder is not respecting the timestamps it’s given.

  According to the x264 options page, I can provide my own timestamps in a file and give it to x264 with a ’tcfile-in’ parameter. But when I try to pass that in through x264enc’s option-string parameter as

  ! x264enc option-string="tcfile-in=/path/to/timestamp.txt"

  I get a

  Bad name for option tcfile-in=/path/to/timestamp.txt

  error.

  Any ideas ?

• How to create a live stream in dash format from mp4 file or m3u8 list ? (ffmpeg)

  30 juin 2017, par jorge.luengo

  I have been trying different ways of running dash live streams from mp4 or m3u8 but none of them worked fined. I want to use ffmpeg because of my server conditions.
  This command has been the one that did something but it didn’t work as I expected :

  ffmpeg-3.3.2-64bit-static/ffmpeg -i reencoded24eng.mp4 -vf yadif=0 -r 30 -vcodec libx264 -keyint_min 60 -g 60 -b:v 1000k -ac 2 -strict 2 -acodec aac -ab 64k -map 0:v -map 0:a -f dash -min_seg_duration 2000  -use_template 1 -use_timeline 1 -init_seg_name init-\$RepresentationID\$.mp4 -dash 1  -media_seg_name test-\$RepresentationID\$-\$Number\$.mp4 test.mpd

  The error that the dash-if conformance tool provides is the following one :

  Start XLink resolving

  XLink resolving successful

  Start MPD validation

  MPD validation successful - DASH is valid !

  Start Schematron validation

  location="/[local-name()=’MPD’ and namespace-uri()=’urn:mpeg:dash:schema:mpd:2011’]/[local-name()=’Period’ and >namespace-uri()=’urn:mpeg:dash:schema:mpd:2011’]">
  If the MPD is dynamic the Period element shall have an id.

  location="/[local-name()=’MPD’ and namespace-uri()=’urn:mpeg:dash:schema:mpd:2011’]/[local-name()=’Period’ and >namespace-uri()=’urn:mpeg:dash:schema:mpd:2011’]/*local[1]">
  Common attributes for AdaptationSet and Representation shall either be in >one of the elements but not in both.

  Schematron validation not successful - DASH is not valid !

  BUILD SUCCESSFUL
  Total time : 5 seconds

  Could anyone help me with this ?

• NGINX | FFMPEG Not creating files in designated directory, Regular nginx works, but not the one with ffmpeg

  23 février 2021, par Thinked

  We're trying to setup multiple streams that have a delay on them through nginx. We have got the nginx server working on our livestream, but for our delayed ones running through ffmpeg, no files are even created.

  


  Relevant parts of the config :

  


  rtmp {
  server {
    listen 1935; # default port: 1935
    chunk_size 4096;
    allow play all;

    application live {
      allow play all;
      live on;
      # on_publish path_to_stream_key_validation.php
      record off;

      # hls
      hls on;
      hls_nested on;
      hls_path /HLS/live;
      hls_fragment 10s;

      # creates the delayed webcam stream
      exec /usr/local/nginx/hls.sh $app $name;
    }

    # creates the http-location for our delayed webcam HLS stream - "http://my-ip/mobile/my-stream-key/index.m3u8"
    application delay {
      allow play all;
      live on;
      hls on;
      hls_nested on;
      hls_path /HLS/delay;
      hls_fragment 10s;
    }
    #DELAY0
    application delay0 {
      allow play all;
      live on;
      hls on;
      hls_nested on;
      hls_path /HLS/delay0;
      hls_fragment 10s;
    }
  }
}


  


  

  


  nginx.conf

  


  #user  nobody;
worker_processes  1;

#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;

#pid        logs/nginx.pid;


events {
  worker_connections  1024;
}


http {
  include       mime.types;
  default_type  application/octet-stream;

  #log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
  #                  '$status $body_bytes_sent "$http_referer" '
  #                  '"$http_user_agent" "$http_x_forwarded_for"';

  #access_log  logs/access.log  main;

  sendfile        on;
  #tcp_nopush     on;

  #keepalive_timeout  0;
  keepalive_timeout  65;

  #gzip  on;

  server {
    listen       80;
    server_name  localhost;

    #charset koi8-r;

    #access_log  logs/host.access.log  main;

    location / {
      root   html;
      index  index.php index.html index.htm;
    }

    #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;
    }

    # proxy the PHP scripts to Apache listening on 127.0.0.1:80
    #
    #location ~ \.php$ {
    #    proxy_pass   http://127.0.0.1;
    #}

    # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000

    location ~ \.php$ {
      root           html;
      fastcgi_pass   127.0.0.1:9000;
      fastcgi_index  index.php;
      # fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;
      # fastcgi_param SCRIPT_FILENAME /usr/local/nginx/html$fastcgi_script_name;
      fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
      include        fastcgi_params;
    }
    #LIVE
    location /live {
      types {
        application/vnd.apple.mpegurl m3u8;
      }
      alias /HLS/live;
      add_header Cache-Control no-cache;
    }
    #DELAY
    location /delay {
      types {
        application/vnd.apple.mpegurl m3u8;
      }
      alias /HLS/delay;
      add_header Cache-Control no-cache;
    }
    #DELAY0
    location /delay0 {
      types {
        application/vnd.apple.mpegurl m3u8;
      }
      alias /HLS/delay0;
      add_header Cache-Control no-cache;
    }
    #DELAY1
    location /delay1 {
      types {
        application/vnd.apple.mpegurl m3u8;
      }
      alias /HLS/delay1;
      add_header Cache-Control no-cache;
    }
    #DELAY2
    location /delay2 {
      types {
        application/vnd.apple.mpegurl m3u8;
      }
      alias /HLS/delay2;
      add_header Cache-Control no-cache;
    }
    #DELAY3
    location /delay3 {
      types {
        application/vnd.apple.mpegurl m3u8;
      }
      alias /HLS/delay3;
      add_header Cache-Control no-cache;
    }

    # deny access to .htaccess files, if Apache's document root
    # concurs with nginx's one
    #
    #location ~ /\.ht {
    #    deny  all;
    #}
  }


  # another virtual host using mix of IP-, name-, and port-based configuration
  #
  #server {
  #    listen       8000;
  #    listen       somename:8080;
  #    server_name  somename  alias  another.alias;

  #    location / {
  #        root   html;
  #        index  index.html index.htm;
  #    }
  #}


  # HTTPS server
  #
  #server {
  #    listen       443 ssl;
  #    server_name  localhost;

  #    ssl_certificate      cert.pem;
  #    ssl_certificate_key  cert.key;

  #    ssl_session_cache    shared:SSL:1m;
  #    ssl_session_timeout  5m;

  #    ssl_ciphers  HIGH:!aNULL:!MD5;
  #    ssl_prefer_server_ciphers  on;

  #    location / {
  #        root   html;
  #        index  index.html index.htm;
  #    }
  #}

}

rtmp {
  server {
    listen 1935; # default port: 1935
    chunk_size 4096;
    allow play all;

    application live {
      allow play all;
      live on;
      # on_publish path_to_stream_key_validation.php
      record off;

      # hls
      hls on;
      hls_nested on;
      hls_path /HLS/live;
      hls_fragment 10s;

      # creates the delayed webcam stream
      #exec ffmpeg -i rtmp://127.0.0.1:1935/$app/$name -acodec copy -c:v libx264 -preset veryfast -profile:v baseline -b:v 400k maxrate 400k -bufsize 400k -threads 0 -r 30 -f flv  rtmp://127.0.0.1:1935/delay3/$;
     
      #exec ffmpeg -i rtmp://127.0.0.1:1935/$app/$name -acodec copy -c:v libx264 -preset veryfast -profile:v baseline -vsync cfr -s 480x360 -b:v 400k maxrate 400k -bufsize 400k -threads 0 -r 30 -f flv rtmp://127.0.0.1:1935/delay0/$;

      exec /usr/local/nginx/hls.sh $app $name;


      #  exec ffmpeg -i rtmp://127.0.0.1:1935/$app/$name -acodec copy -c:v libx264 -preset veryfast -profile:v baseline -vsync cfr -s 1920x1080 -b:v 400k maxrate 400k -bufsize 400k -threads 0 -r 30 -f flv  -filter_complex "[0:v]crop=480:270:0:0[out1];[0:v]crop=480:270:480:0[out2];[0:v]crop=480:270:960:0[out2];[0:v]crop=480:270:1440:0[out2]" -map [out1] -map 0:a rtmp://127.0.0.1:1935/delay0/$ -map [out2] -map 0:a rtmp://127.0.0.1:1935/delay1/$ -map [out3] -map 0:a rtmp://127.0.0.1:1935/delay2/$ -map [out4] -map 0:a rtmp://127.0.0.1:1935/delay3/$;
    }

    # creates the http-location for our delayed webcam HLS stream - "http://my-ip/mobile/my-stream-key/index.m3u8"
    application delay {
      allow play all;
      live on;
      hls on;
      hls_nested on;
      hls_path /HLS/delay;
      hls_fragment 10s;
    }
    #DELAY0
    application delay0 {
      allow play all;
      live on;
      hls on;
      hls_nested on;
      hls_path /HLS/delay0;
      hls_fragment 10s;
    }
    #DELAY1
    application delay1 {
      allow play all;
      live on;
      hls on;
      hls_nested on;
      hls_path /HLS/delay1;
      hls_fragment 10s;
    }
    #DELAY2
    application delay2 {
      allow play all;
      live on;
      hls on;
      hls_nested on;
      hls_path /HLS/delay2;
      hls_fragment 10s;
    }
    #DELAY3
    application delay3 {
      allow play all;
      live on;
      hls on;
      hls_nested on;
      hls_path /HLS/delay3;
      hls_fragment 10s;
    }

  }
}


  


  We just tested a shell script variant of the exec function so here is the shellscript :

  


  ffmpeg -i rtmp://127.0.0.1:1935/$app/$name -acodec copy -c:v libx264 -preset veryfast -profile:v baseline -vsync cfr -s 480x360 -b:v 400k maxrate 400k -bufsize 400k -threads 0 -r 30 -f flv rtmp://127.0.0.1:1935/delay0/$


  


  errors :