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how to spot an audio manipulation in a video?


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                On the occasion of Press and Media Week at school, the editorial staff of France 24 Observers produced a special edition of its "Info ou Intox" program.  In this program, our journalists answer questions from students from four French high schools.  Not all of the questions could be picked up on our show.  We answer six other questions posed by high school students in a series of articles.  To begin with: how do you spot an audio manipulation in a video?
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                                    <p>Spotting a sound modification in a video is very often a complicated exercise, because today there is no software to verify the sound.  However, it is often enough to rely on your observation to spot one.

Recently, the Observers editorial staff spotted a video claiming to show the President of Tunisia announcing the establishment of a military government. It was not complicated by observing the movement of his lips to identify that it did not correspond at all to what he was saying. We therefore simply searched for the video with the InVid tool and found its origin: it was a parody by a Tunisian influencer.

>> See our Info or Intox episode below on the subject:

A video of Tunisian President Kaïs Saïd toured Egyptian social networks on the anniversary of the 2011 revolution in Egypt. In reality, it is a montage taken out of context. © © FM Graphic Studio

Sometimes it’s more complex. When the Perseverance robot landed on Mars on February 18, a video created a buzz claiming to show the first exclusive images of the rover, as well as the first sound heard on the planet.

Finding the original images turned out to be quite simple: it was in fact a panorama of the Curiosity robot dating from January 2020.

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But for the sound, we had to do more research, and we finally managed, thanks to a comment from a space specialist on Twitter, to identify the origin: it was a recording made by a NASA probe in April 2019.

>> See our Info or Intox episode on the subject below:

<div data-wrapper-video-player="" data-show-hidden-video-player="WBMZ1466-OBS-FR-20210325">
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An old video and a sound added by this Internet user made believe in a video taken by Perseverance on Mars.  But it is not.
An old video and a sound added by this Internet user made believe in a video taken by Perseverance on Mars. But it is not. © FMM Graphic Studio

In general, to check a video, you have to listen to the sound. And here are some questions to ask yourself: what language is spoken, is it credible with regard to the video in question? Does the speaking person (s) seem to be pronouncing the words well? Am I sure about the translation? Could a sound be added?

>> See our special edition Info or Intox 2021 below:

<div data-wrapper-video-player="" data-show-hidden-video-player="WBMZ1443-OBS-FR-20210323">
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Maëva Poulet and Alexandre Capron answer questions from several French high school students.
Maëva Poulet and Alexandre Capron answer questions from several French high school students. © FMM Graphic Studio

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Source site observers.france24.com

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