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• avformat_open_input failed at openning local rtmp stream

  3 septembre 2019, par edhu

  I’m relatively new to this workflow and this might be a simple problem to solve. However, I haven’t found answers that matched exactly with my question. I’ve set up my nginx server with rtmp module and for testing purposes I used the following command to publish my stream :

  ffmpeg -re -i  -vcodec libx264 -vprofile baseline -acodec aac -strict -2 -f flv rtmp://localhost/show/stream

  After that, I launched up my application which is supposed to read the stream from the nginx server and it failed at

  avformat_open_input(&ctx, szFilePath, NULL, NULL);

  The returned error code is -5 and it signifies I/O issue. The szFilePath I passed in is rtmp://localhost/show/stream and I assume this will automatically work since it works when I tried to play some mp4 sample files online. I also tried rtmp://localhost:1935/show/stream and vice versa. I could view the stream being played in VLC but I can’t open it in the code. I’m not really sure what happened here. I feel like this isn’t necessarily a complicated issue but I don’t know where to start looking for possibles causes. I’d appreciate the help. Thanks !

• fluent ffmpeg => how to trim and concate parts of video into one output file without writing many output files. Make a most efficient solution

  30 avril 2024, par Shreyansh Gupta

  I'm currently working on a online video website and i need to make a quick preview of videos using random timestamps and duration of the video.

  


  Suppose the video is of 15 min then i want to cut out some parts like ->

  


  1. from 00:00:40 take out next 2s 
2. from 00:01:20 take out next 2s 
3. ... and so on until the new video becomes 15s


  


  How can i do this with fluent-ffmpeg in the nodejs project

  


  Can i get the most efficient way of doing this without writing many output files and then concating them separately and removing then later

  


  Only concating the trimmed videos in one output file and save when it is done.

  


  I also came through a solution that uses complex filters but i don't know how to use it

  


     ffmpeg("video.mp4")
  .complexFilter([
    ....// some filters here

  ])
  .on('end',  function () {
    console.log('files have been merged and saved.')
  })
  .on('error',function (err){
    console.log(err)
  }
  .saveToFile("output.mp4")```


  


• FFmpeg can't access file in Dropbox on Ubuntu 12.04

  30 juin 2015, par afterglowlee

  I have installed FFmpeg on Ubuntu 12.04. When I use ffmpeg -i command to check some video file online, it works :

  ffmpeg -i http://techslides.com/demos/sample-videos/small.mp4

  However, when I check a public file hosted in my Dropbox it gives ’No such file or directory error’ :

  ffmpeg -i https://dl.dropboxusercontent.com/u/51617581/bigbuck.webm

  and the error is :

  https://dl.dropboxusercontent.com/u/51617581/bigbuck.webm : No such
  file or directory

  and here is the version info of the ffmpeg installation :

  ffmpeg version 0.8.17-4:0.8.17-0ubuntu0.12.04.1, Copyright (c)
  2000-2014 the Libav developers built on Mar 16 2015 13:26:50 with
  gcc 4.6.3

  I have also tried both files on my Mac 10.10 laptop, and both of them work fine. Could anyone suggest where is the problem ? Many thanks.