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• Append two videos without duplicating FFMPEG

  10 septembre 2021, par Hasindu Lanka

  Let's say we have 2 video files (X,Y) in the same format, codec and dimensions.

  


  X is a longer video with several gigabytes in size. Y is a short 10 second video. I want to append Y to the end of X without creating another copy of X (Because it's big in size)

  


  I have to repeat this process for hours with many 10 second videos arriving one after another.

  


  Currently, I'm concatenating files using ffmpeg.

  


  ffmpeg -f concat -safe 0 -i chunk.list -c copy final-video.mkv

  


  chunk.list contains file names of X and several 10 second videos. After this, X will be deleted and replaced by final-video.mkv. Then, repeat.

  


  But this needs twice the storage capacity and I/O operations. How to do this without creating duplicates ?

  


  It's okay to duplicate these 10 second videos. But duplicating that bigger file X really hurts performance.

  


  Additional info :

  


  All these videos will be encoded with H264, H265, VP8 or VP9 and contained in MKV or MP4 as they are codec copy friendly. Only one of these formats will be used.

  


  This is for a special case screen recorder that's supposed to run on cloud and preemptive remote desktops (Linux).
HTML/JS browser front-end captures the screen and sends to the back-end (Golang) as chunks through HTTP. Network route is undefined and unreliable as there can be firewalls/proxies between the front-end and the back-end. Therefore, we can't use connections like UDP. So the only option is to send video chunks using HTTP.

  


  It's FOSS on https://github.com/HasinduLanka/screencorder

  


• How to display multiple rtmp streams from Gryphon nginx ?

  22 août 2018, par LoukMo

  CONTEXT :

  -I received a rtsp stream link from an onvif ip camera.

  -The camera can only host 5 streaming connection at a time (I want/need more connections).

  -I’ve been informed that a combination of ffmpeg (to convert the rtsp stream to rtmp) and nginx (to redistribute as many streams as I want) would do what I want.

  -I’m on Windows 10.

  -I downloaded ffmpeg from this source and nginx from this source (nginx 1.7.11.3 Gryphon.zip).

  -Here’s the conf file of the nginx server :

  user nobody;
  
  worker_processes 1;
  
  
  
  events {
  
    worker_connections  1024;
  
  }
  
  
  
  rtmp {
  
          server {
  
                  listen 1935;
  
                  chunk_size 4096;
  
  
  
                  application live {
  
                          live on;
  
                          record off;
  
                  }
  
          }
  
  }

  -I’m using this command to push my camera’s stream to the nginx server :

  ffmpeg -hide_banner -i "rtsp://user:password123@192.168.10.116:554/videoMain" -an -f flv -rtmp_live live "rtmp://127.0.0.1:1935/live"

  -I can then see the output stream using vlc’s open network stream tool (rtmp ://127.0.0.1:1935/live)

  QUESTION :

  Is there a way to have multiple input/outout streams at the same time ?

  I want to have multiple cameras redirected at the same time by one server...

  

• looking for Settings for FFmpeg, xTeVe, Plex [closed]

  3 août 2022, par Chris

  I am not sure if I am in the right place. But maybe someone can help me.

  


  Sorry for my bad english.

  


  I have a Qnap NAS, on this is insalled FFmepg, xTeVe and Plex.
I try to see IPTV Streams on Plex.

  


  Here the log file from xTeVe :

  


  ---

  


  2022-02-28 21:57:42 [xTeVe] Buffer : true [ffmpeg]

  


  2022-02-28 21:57:42 [xTeVe] Buffer Size : 4096 KB

  


  2022-02-28 21:57:42 [xTeVe] Channel Name : VIP SW : SRF 1 FHD

  


  2022-02-28 21:57:42 [xTeVe] Client User-Agent : Lavf/58.65.101

  


  2022-02-28 21:57:43 [xTeVe] Streaming Status : Playlist : Schweiz Neu - Tuner : 1 / 1

  


  2022-02-28 21:57:43 [xTeVe] FFMPEG path : /usr/bin/ffmpeg

  


  2022-02-28 21:57:43 [xTeVe] Streaming URL : http://tunestream.me:8080/XXXXXXX
/XXXXXXXX/9165

  


  2022-02-28 21:57:43 [xTeVe] FFMPEG : Processing data

  


  2022-02-28 21:57:43 [xTeVe] Streaming Status : Receive data from FFMPEG

  


  2022-02-28 21:57:43 [xTeVe] FFMPEG log : [mpegts @ 0x55e0732fe560] dimensions
not set

  


  2022-02-28 21:57:43 [xTeVe] [ERROR] FFMPEG error (Streaming was stopped by third party
transcoder (FFmpeg / VLC)) - EC : 1204

  


  2022-02-28 21:57:43 [xTeVe] FFMPEG log : Could not write header for output file
#0 (incorrect codec parameters ?) : Invalid argument

  


  2022-02-28 21:57:43 [xTeVe] FFMPEG log :

  


  2022-02-28 21:57:43 [xTeVe] Streaming Status : Client has terminated the connection

  


  2022-02-28 21:57:43 [xTeVe] Streaming Status : Channel : VIP SW : SRF 1 FHD (Clients : 0)

  


  2022-02-28 21:57:44 [xTeVe] Streaming Status : Channel : VIP SW : SRF 1 FHD - No client
is using this channel anymore. Streaming Server connection has ended

  


  2022-02-28 21:57:44 [xTeVe] Streaming Status : Playlist : Schweiz Neu - Tuner : 0 / 1

  


  ---

  


  on xTeVe i set this settings :

  


  Buffer Size : 5 MB

  


  Timeout for new client connections : 500

  


  FFmpeg Options : -hide_banner -loglevel error -i [URL] -c copy -f mpegts pipe:1

  


  If i put the Streaming URL on VLC is working.
But not with FFmpeg, xTeVe and Plex.

  


  Thanks for your help.

  


  Greetings
Chris