MAKING WEBM WITH FFMPEG

FFMPEG.MD

MAKING WEBM WITH FFMPEG

Easy way out of this

For people who are afraid of the commandline https://gitgud.io/nixx/WebMConverter

Skip to the download link: http://nixx.is-fantabulo.us/WebM%20for%20Retards/latest.zip

Installation

These are the installation instructions for linux. Windows users can just download the executable and skip to the step usage.

Download ffmpeg from http://ffmpeg.org/ Extract the file tar -xf ffmpeg-3.0.1.tar.bz2

Install the dependencies. The libvpx is a library that is needed to output the webm format. And some parts to incorporate it into ffmpeg seem to be written in yasm.

aptitude install libvpx-dev yasm -y

Onto the compiling. Don't forget the --enable-libvpx flag. Adjust -j flag to rougly the amount of cores you have in your machine to speed up the compilation.

cd ffmpeg-3.0.1/
./configure --enable-libvpx
make -j5
sudo make install

Usage

How to create a simple webm from a movie.

ffmpeg -t 12.2 -ss 25.5 -movie.mp4 -vcodec libvpx -strict -2 funny.webm

Deconstruction:

• -t 12.2 take a 12.2 seconds clip
• -ss 25.5 start at the 25.5 seconds mark
• -i movie.mp4 is the input file
• -vcodec libvpx use the codec you need for webm for output
• -strict -2 use vorbis sound(which is experimental) so you also have sound
• funny.webm the output file name

This link contains a few tips to improve the quality: https://wiki.installgentoo.com/index.php/WebM

Bonus

Acquire video material from youtube by using youtube-dl. https://rg3.github.io/youtube-dl/