I am facing a strange issue. I can heard audio from youtube and other downloaded video files from my ubuntu. I have bought some courses from udemy. Surprisingly, there is no audio when I play those videos on my browser. I have changed the browser but no help. I even downloaded the video to my pc and play from that. Video is running but there is no audio! I don't understand what's the problem as other videos is running with audio.

This is the property of the video from where I am NOT getting any sound.

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And This is the property of the video from where I am getting sound.

enter image description here

Note: videos from udemy is running correctly (with audio) at windows 10 in my other pc.

============== Update ===================

I found the problem! Cable of my headphone is so small that can't reach to my ear if I directly insert it at speaker port. That's why, I use an extension cable. But, with the cable I can't hear audio from udemy's video. Without cable, I can hear it. But, it's still strange as I can hear audio from other video's (except udemy's videos) with the extension cable! Any solution for it without changing the cable?

enter image description here

  • Please provide list of tested browsers. – mature Nov 23 '18 at 11:12
  • @S_Flash, I've tested on chrome and firefox. This is not issue with browsers. Because, I downloaded the video files on my pc (Ubuntu) and I am not getting any sound from those files. But, those video is playing with audio on my other windows pc – user1896653 Nov 23 '18 at 11:16
  • 1
    Try install run in command line: sudo apt-get install ubuntu-restricted-extras – mature Nov 23 '18 at 11:22

To install all media codecs for Ubuntu run in (Ctrl+Alt+T) Terminal:

sudo apt-get update
sudo apt-get install chromium-codecs-ffmpeg-extra

If you need play videos on desktop only, you can install VLC media player from Ubuntu Software (VLC has own codecs).

  • I have run this, still the issue exist. the download flies from udemy is mp4. I run it with vlc too. But, there is no audio. Other mp4 is running with audio in my ubuntu. – user1896653 Nov 23 '18 at 11:35
  • I found the problem. Can you please read the Update portion of my post? – user1896653 Nov 26 '18 at 8:53

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