Recherche avancée

Sur d’autres sites (11530)

• configure : move ranlib -D test after setting defaults

  14 février 2022, par Adrian Ratiu

  configure : move ranlib -D test after setting defaults
  In Gentoo and ChromeOS we want to allow pure LLVM builds without
  
  using GNU tools, so we block any unwanted mixed GNU/LLVM usages
  
  (GNU tools are still kept around in our chroots for projects
  
  like glibc which cannot yet be built otherwise).
  The default $cross_prefix$ranlib_default points to GNU and
  
  fails, so move the test a bit later - after the defaults are
  
  set and the proper values get overriden - such that ffmpeg
  
  configure calls the llvm-ranlib we desire. [1]
  [1] https://gitweb.gentoo.org/repo/gentoo.git/tree/media-video/ffmpeg/ffmpeg-4.4.1-r1.ebuild?id=7a34377e3277a6a0e2eedd40e90452a44c55f1e6#n477
  Signed-off-by : Adrian Ratiu <adrian.ratiu@collabora.com>
  
  Signed-off-by : Martin Storsjö <martin@martin.st>
  

  • [DH] configure

• Merge several video files with ffmpeg and lose any track

  9 avril 2016, par AlbanMar31

  How to join two video files without losing any channel with ffmpeg ?

  Origin, we have 2 video files ts record with the TV decoder TNT.

  Destination we would have one single video file containing the same number of channels as each original file.

  Goal : The resulting video will have the same number of channels that each of the original videos.

  usual command to merge :

  ffmpeg -threads 4 -i data0001.ts -i data0002.ts -i data0003.ts -c copy -scodec copy video.ts

  Channel information video files :

  $ ffprobe data0001.ts -hide_banner

  give me this type of result :

  Stream #0:0 : Video: mpeg2video ...
  
  Stream #0:1: Audio: mp2 ...  
  
  Stream #0:2: Audio: mp2 
  
  Stream #0:3: Subtitle: dvb_subtitle 
  
  Stream #0:4: Subtitle: dvb_subtitle

• Streaming HLS with Nginx & FFMPEG : How to prevent repeating or skipping scenes (.ts) when playback ?

  31 août 2022, par Fugen

  I set up HLS streaming server using Nginx & FFMPEG, then i watch it using vlc or ffplay on another pc. The problem is sometimes it repeating scenes or skipping scenes for few seconds then it continue like normal, it happens at random but occurs occasionally and not always on the same spots.
  

  


  Here is sample of ffplay log :

  


  [http @ 000002c6e2611c00] Opening 'http://172.20.120.75:8080/hls/test-3.ts' for reading
[hls @ 000002c6e260bcc0] Skip ('#EXT-X-VERSION:3')sq=    0B f=0/0
[hls @ 000002c6e260bcc0] Skip ('#EXT-X-DISCONTINUITY')
[http @ 000002c6e2614500] Opening 'http://172.20.120.75:8080/hls/test-3.ts' for reading
[http @ 000002c6e2611c00] Opening 'http://172.20.120.75:8080/hls/test-4.ts' for reading
[http @ 000002c6e81c8140] Opening 'http://172.20.120.75:8080/hls/test.m3u8' for reading
[hls @ 000002c6e260bcc0] Skip ('#EXT-X-VERSION:3')sq=    0B f=1/1
[hls @ 000002c6e260bcc0] Skip ('#EXT-X-DISCONTINUITY')
[http @ 000002c6e2614500] Opening 'http://172.20.120.75:8080/hls/test-3.ts' for reading
[http @ 000002c6e2611c00] Opening 'http://172.20.120.75:8080/hls/test-4.ts' for reading
[http @ 000002c6e81c8140] Opening 'http://172.20.120.75:8080/hls/test.m3u8' for reading
[hls @ 000002c6e260bcc0] Skip ('#EXT-X-VERSION:3')sq=    0B f=2/2
[http @ 000002c6e2614500] Opening 'http://172.20.120.75:8080/hls/test-6.ts' for reading
[http @ 000002c6e2611c00] Opening 'http://172.20.120.75:8080/hls/test-7.ts' for reading
[http @ 000002c6e81c8140] Opening 'http://172.20.120.75:8080/hls/test.m3u8' for reading
[hls @ 000002c6e260bcc0] Skip ('#EXT-X-VERSION:3')sq=    0B f=2/2
[http @ 000002c6e2614500] Opening 'http://172.20.120.75:8080/hls/test-7.ts' for reading
[http @ 000002c6e81c8140] Opening 'http://172.20.120.75:8080/hls/test.m3u8' for reading
[hls @ 000002c6e260bcc0] Skip ('#EXT-X-VERSION:3')sq=    0B f=2/2
[http @ 000002c6e2611c00] Opening 'http://172.20.120.75:8080/hls/test-8.ts' for reading


  


  From that log, repeating scenes are : test-3.ts, test-4.ts, test-7.ts, and skipped scene : test-5.ts.
  My question is : how to prevent this ?

  


  When i checked .m3u8 playlist on server side it seems normal, no repeated or skipped .ts file. Here is .m3u8 file :

  


  #EXTM3U
#EXT-X-VERSION:3
#EXT-X-MEDIA-SEQUENCE:17
#EXT-X-TARGETDURATION:4
#EXTINF:3.600,
test-1.ts
#EXTINF:3.560,
test-2.ts
#EXTINF:3.600,
test-3.ts
#EXTINF:3.600,
test-4.ts
#EXTINF:3.600,
test-5.ts
#EXTINF:3.600,
test-6.ts
#EXTINF:3.600,
test-7.ts
#EXTINF:3.520,
test-8.ts
#EXTINF:3.600,


  


  My Nginx Configuration :

  


  worker_processes 4;
events {
        worker_connections 1024;
        use epoll;
        multi_accept on;
}

# RTMP configuration
rtmp {
    server {
        listen 1935; # Listen on standard RTMP port
        chunk_size 4096;

        application show {
            live on;
            # Turn on HLS
            hls on;
            hls_path /tmp/hls/;
            hls_fragment 3;
            hls_playlist_length 60;
            # disable consuming the stream from nginx as rtmp
            deny play all;
        }
    }
}

http {
        sendfile off;
        tcp_nopush on;
        tcp_nodelay on;
        reset_timedout_connection on;
        directio 512;
        default_type application/octet-stream;

    server {
        listen 8080;

        location /hls {
            # Disable cache
            add_header 'Cache-Control' 'no-cache';
            access_log off;
            # CORS setup
            add_header 'Access-Control-Allow-Origin' '*' always;
            add_header 'Access-Control-Expose-Headers' 'Content-Length';
            # allow CORS preflight requests
            if ($request_method = 'OPTIONS') {
                add_header 'Access-Control-Allow-Origin' '*';
                add_header 'Access-Control-Max-Age' 1728000;
                add_header 'Content-Type' 'text/plain charset=UTF-8';
                add_header 'Content-Length' 0;
                return 204;
            }

            types {
                application/dash+xml mpd;
                application/vnd.apple.mpegurl m3u8;
                video/mp2t ts;
            }

            root /tmp/;
        }
location /nginx_status {
        # Turn on stats
        stub_status on;
        allow all;
    }
}
}


  


  My FFMPEG Command :

  


  ffmpeg -re -stream_loop -1 -i 'video1.mp4' -vcodec libx264 -vprofile baseline -g 30 -acodec aac -strict -2 -f flv 'rtmp://172.20.120.75/show/test' &


  


  Thank You for Your Help.