Someone actually stumbled upon a similar issue that required him to figure out how to build libav. I guess at this point the only way to make this youtube-dl work would be to build & install libav manually –. Weirdly, I could not find any quick way to install latest libav in Ubuntu 14.04. Ii libav-tools 6:9.20-0ubuntu0.14.04.1 amd64 Multimedia player, server, encoder and transcoder SaveFrom Video Downloader allows to download videos from the Internet in mp4 fast and free.

The reason is that youtube-dl uses libav to combine downloaded files, while libav available in the system is outdated – youtube-dl expects version at least 10.0, but the system has 9.2: dpkg -l | grep libav-tools It will only download a single part of the video, and will not proceed further. The video download now fails, however, due to another reason. Update avconv to version 10-0 or newer to fix this. WARNING: Your copy of avconv is outdated and unable to properly mux separate video and audio files, youtube-dl will download single file media. Set the LC_ALL environment variable to fix this. WARNING: Assuming -restrict-filenames since file system encoding cannot encode all characters. Choose the format of the video/audio you want to save, then click the 'Download' button. Choose 'Start' for the Facebook downloader to start converting.

To make sure you're using the latest youtube-dl available, do the following: sudo add-apt-repository ppa:nilarimogard/webupd8Īfter doing the above in Ubuntu 14.04 Trusty, I got 2018.01.07 version of youtube-dl and was able to download the video in question: youtube-dl '' Search the name of the video or paste the link of the video you want to convert. What version of Ubuntu & youtube-dl are you using?

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