Join the Mozilla’s Test Days event from 9–15 Jan to test the new Firefox address bar on Firefox Beta 135 and get a chance to win Mozilla swag vouchers! 🎁

Ce site disposera de fonctionnalités limitées pendant que nous effectuons des opérations de maintenance en vue de vous proposer un meilleur service. Si un article ne règle pas votre problème et que vous souhaitez poser une question, notre communauté d’assistance est prête à vous répondre via @FirefoxSupport sur Twitter, et /r/firefox sur Reddit.

Rechercher dans l’assistance

Évitez les escroqueries à l’assistance. Nous ne vous demanderons jamais d’appeler ou d’envoyer un SMS à un numéro de téléphone ou de partager des informations personnelles. Veuillez signaler toute activité suspecte en utilisant l’option « Signaler un abus ».

En savoir plus

I cannot open files downloaded with the easy youtube downloader add-on

  • 3 réponses
  • 5 ont ce problème
  • 2 vues
  • Dernière réponse par andy.portman

more options

I am trying to get video clips from youtube so i can edit them together to make my own videos. using the easy youtube downloader add-on, i saved the videos to an mp4 format, after the video is downloaded, when i attempt to open it, all the player say that it is not a comptable file format (eventhough the save says .mp4) or the codec is unsupported, what can i do to support the codec, or obtain the videos in a fashion i can use them?

I am trying to get video clips from youtube so i can edit them together to make my own videos. using the easy youtube downloader add-on, i saved the videos to an mp4 format, after the video is downloaded, when i attempt to open it, all the player say that it is not a comptable file format (eventhough the save says .mp4) or the codec is unsupported, what can i do to support the codec, or obtain the videos in a fashion i can use them?

Toutes les réponses (3)

more options

Which player are you using?

A program like VLC or MPlayer is capable of playing a lot of media files.

more options

Ive tried WMP and trying to load the files in Camtasia, regardless of what player i use, i get the same message saying file format or the codec is not supported

more options

YouTube is changing its format to DASH video and audio formats. It means you cannot play them alone. You need to download both streams and then combine them together. I know https://addons.mozilla.org/en-US/firefox/addon/youtube-video-and-audio-dow/ does this automatically. Not sure about easy youtube downloader add-on.