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• avformat : Append data in fill_buffer() when possible

  30 juin 2013, par Michael Niedermayer

  avformat : Append data in fill_buffer() when possible
  Data is appended in fill_buffer() when there is sufficient space left
  
  and the data pointer only reset when needed.
  
  Previously the data pointer was more often reset, loosing more seekback
  
  space than otherwise needed.
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libavformat/aviobuf.c

• 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 () {})




  


• FFmpeg can't decode H264 stream/frame data

  31 juillet 2015, par Gediminas

  Recently I had chance to work with two devices that are streaming the H264 through RTSP.
  And I’ve ran into some problem trying to decompress this stream using FFmpeg library.

  Every time the "avcodec_decode_video2" is called - FFmpeg just says something like :

  [h264 @ 00339220] no frame !

  My raw H264 stream I frame data starts like this : "65 88 84 21 3F F8 F8 0D..."
  (as far as I understand this 0x65 indicates that it’s a IDR frame ?)

  Other frames for one device starts like : "41 9A 22 07 F3 4E 48 CC...."

  and for other device - like this : "61 9A 25 C1 1C 45 62 39...."

  • Am I missing some frame data here ?
  • Does FFmpeg needs to have some extra parameters set up ?

  I was expecting at least "00 00 00 01" bytes at the start for the frame data... but this is what I’ve got..