Sur d’autres sites (8412)

• Android cropping and decreasing video size

  6 octobre 2016, par hellsayenci

  we are going to start an app that captures videos or picks videos from gallery. The videos will be exactly 30 seconds, so users can crop or trim videos like video editor.

  At this point, we got 2 main problems. The first one is video size. You know the video size could be huge for uploading :) So we need to decrease video size. The other problem is when iOS device captures and uploads video to server, there are some problems when trying to play that video on android app.

  We have used “ffmpeg” library before for an another project but that library has varous problems like slow compression or library .so file’s size. And also have compatibility issues with sdk 24 (nougat)

  Anyone has an experience about that ? Or any ideas to overcome those problems ? Thank u all.

• How to play random part of mp4 file with vlc or something else ?

  13 septembre 2011, par pprzemek

  I have random part (99,9% somewhere in the middle) of the mp4 file. Problem is that it's not in any container or anything just a binary piece of the file in random offset and send to me... it will keep growing but it'll take a while and I need to play content right away.

  I can get all necessary metadata information for that file from other source before I even start receiving those binary data, but :

  1. How to do this ? I mean what headers do I need and how to get them ?
     and
  2. How to later tell vlc (or maybe some other player) that this moov atom (or some other data) that it should use for this part of the file and start playing it ?

• Play just audio (without launching a window)

  6 août 2017, par Paradise on E

  Is there a way to hide ffplay window on Windows ? I want to play audio files (some of them have video streem as well), but I don’t want a window to appear. Is there any way to hide window completelly ?

  I took a look at their documentationa and I didn’t find a way to do it. I also searched on the internet and didn’t find anything useful. Everyone are asking "Why in the world do you want to hide window..." and similar questions instead of actually posting an answer on how to do it.

  I believe ffplay doesn’t have native way to hide window. So, what are the most easiest alternative ? One of the alternatives would be to download ffplay source code, modify it and recompile it, but it is definitelly not an easy and quick way.

  Is there any way I can launch a process without showing window. It would be great if there is some way to achieve it when ffplay is launched from Node.js (becuase I am using Node.js’s module child_process to play audio files). So, how can I hide ffplay’s window ?

  My current code is following :

  var cp = require('child_process');
  
  var proc = cp.spawn('ffplay', [
  
    '-no_banner',
  
    '-loglevel', 'panic',
  
    playlist.splice(Math.random() * playlist.length | 0, 1)[0]
  
  ]);

  Question

  How to hide ffplay’s window ? If it is possible using ffplay native arguemnts (which I didn’t find in ther documentation) then what arguments to use ? If there is no native way, then is it possible to do it using Node.js’s module child_process ? If not, is there any other way I can hide ffplay’s window ? Again, I must note that some of files I play have video stream as well. So, is there any way to hide ffplay’s window ?

  Thanks in advance.