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• ffmpeg : Turning images/audio into video with ffmpeg

  7 mai 2018, par melanie93

  I am using ffmpeg to turn a sequence of images (img001.png, img002.png, and so on) into a video (output.mp4) using the following command :

  ffmpeg -r 1/5 -i img%03d.png  -r 25 -qscale:v 2 -shortest -codec:a copy output.mp4

  The result is a video that displays every input image for five (5) seconds.

  1. Is it possible to have ffmpeg parse the filename paths and timings from a file ? I tried the slideshow tutorial on the official ffmpeg website but the output displayed only the last image, briefly, at the end of the video.
  2. Is it possible to bundle audio files with those settings ?

  For example :

  file 'image001.png'
  
  file 'sound001.wav'
  
  duration 5
  
  file 'image002.png'
  
  file 'sound002.wav'
  
  duration 2
  
  file 'image003.png'
  
  file 'sound003.wav'
  
  duration 3

  Image001 is displayed for five(5) seconds while sound001 is being played back and so on.

• prores : Extend the padding check to 16bit

  25 février 2015, par Luca Barbato

  prores : Extend the padding check to 16bit
  Some files produced by the official encoder have up to 16bit of
  
  padding instead of the expected padding to the byte.
  Use a self-explanatory macro instead of a simple number.
  CC : libav-stable@libav.org
  Signed-off-by : Luca Barbato <lu_zero@gentoo.org>
  

  • [DBH] libavcodec/proresdec.c

• Outputting file details using ffprobe in ffmpeg AWS Lambda layer

  17 février 2021, par Gracie

  I am trying to output the details of an audio file with ffmpeg using the ffprobe option. But it is just returning 'null' at the moment ? I have added the ffmpeg layer in Lambda. can anyone spot why this is not working ?

  



  const { spawnSync } = require("child_process");
const { readFileSync, writeFileSync, unlinkSync } = require("fs");
const util = require('util');
var fs = require('fs');
let path = require("path");

exports.handler = (event, context, callback) => {

    spawnSync(
        "/opt/bin/ffprobe",
        [
            `var/task/myaudio.flac`
        ],
        { stdio: "inherit" }
        );
};


  



  This is the official AWS Lambda layer I am using, it is a great prooject but a little lacking in documentation.

  



  https://github.com/serverlesspub/ffmpeg-aws-lambda-layer