Recherche avancée

Sur d’autres sites (11715)

• How to create multi bit rate dash content using ffmpeg dash muxer

  26 août 2020, par andrii

  ffmpeg documentation says that we can use dash muxer to create dash segments and manifest file with just a single command, like :

  



  ffmpeg -re -i <input /> -map 0 -map 0 -c:a libfdk_aac -c:v libx264&#xA;-b:v:0 800k -b:v:1 300k -s:v:1 320x170 -profile:v:1 baseline&#xA;-profile:v:0 main -bf 1 -keyint_min 120 -g 120 -sc_threshold 0&#xA;-b_strategy 0 -ar:a:1 22050 -use_timeline 1 -use_template 1&#xA;-window_size 5 -adaptation_sets "id=0,streams=v id=1,streams=a"&#xA;-f dash /path/to/out.mpd&#xA;

  



  Saying I have some HD video file and I want this video to be available through DASH in different bit rates, so that clients can automatically select from the alternatives based on current network conditions. Can all these be done with a single ffmpeg command, like given above ?

  



  I know there is a solution with using ffmpeg + mp4box, but i'm interested if it could be done with ffmpeg only.

  


• Programmatically capture X11 region with ffmpeg in C/whatever

  26 février 2013, par zw0rk

  There is an input format option to ffmpeg — x11grab which allows one to capture specified region and output it to file/stream. I'm trying to do the same thing programmatically, but i haven't found any non-basic tutorials/reference for ffmpeg API.

  I wonder, how it is possible to open x11 region with avformat_input_file or something like this. Or should i do it with XCopyArea/etc ?

  (Any programming language will satisfy)

• How to make video using ffmpeg with multiple photos and audio node.js

  2 juin 2020, par Jechanka

  im trying to make a video using ffmpeg (videoshow.js), at this moment i can make video with many photos but only one audio, i can't use each audio to each image, is it possible ?

  



  
var videoshow = require('videoshow')
const ffmpegPath = require('@ffmpeg-installer/ffmpeg').path;
const ffmpeg = require('fluent-ffmpeg');
ffmpeg.setFfmpegPath(ffmpegPath);
var images = [
  '1.jpg',
  '2.jpg',
]

var videoOptions = {
  fps: 25,
  loop: 5, // seconds
  transition: true,
  transitionDuration: 1, // seconds
  videoBitrate: 1024,
  videoCodec: 'libx264',
  size: '2000x?',
  audioBitrate: '128k',
  audioChannels: 11,
  format: 'mp4',
  pixelFormat: 'yuv720p'
}

videoshow([{
    path: '1.jpg',
    audio: 'fck-corona', // NOT WORKING
    caption: 'Hello world as video subtitleHello world as video subtitlHello world as video subtitlHello world as video subtitlHello world as video subtitlHello world as video subtitlHello world as video subtitlHello world as video subtitlHello world as video subtitlHello world as video subtitlHello world as video subtitlHello world as video subtitlHello world as video subtitlHello world as video subtitlHello world as video subtitl'
  }, {
    path: '2.jpg',
    audio: 'audio.mp3', // NOT WORKING
    caption: 'This is a sample subtitle',
    loop: 10 // long caption
  }])
  .audio('audio.mp3') // WOrking but i can use only one audio
  .save('video.mp4')
  .on('error', function () {})
  .on('end', function () {})