Ubuntu: How to Convert FLV file to MP3 Using ffmpeg

We can download video in FLV format from YouTube using Flashgot Add-On on Firefox web browser.

In order to extract the MP3 from the FLV video file, please follow the following procedure.

First, install ffmpeg software:

sudo apt-get install ffmpeg

Once ffmpeg is installed, convert FLV file to MP3 using the following command:

ffmpeg -i flv_file.flv output_file.mp3

Replace y with 3 to download YouTube Video

3outube.com provides an easy way to download YouTube videos to your PC. The video could be downloaded in MP4 or FLV formats. The service is provided for free.

Figure 1: Replace letter "y" with number "3"

In order to download the video, replace the letter “y” with number “3” of the YouTube video link that you want to download as shown in Figure 1. Finally, choose the format of the video to download (Figure 2).

You can also go to their website and enter the YouTube video link directly inside a text box at the bottom of the page.

Figure 2: Choose between .MP4 or .FLV video format. 

I know there are other similar service exist, but replacing letter “y” with the number “3” to download the video is such an awesome idea.