#videoconverter.js
videoconverter.js is a library that allows you to convert and manipulate videos inside of your web browser.
This is acheived by converting the popular FFmpeg library into JavaScript, using Emscripten.
It was originally conceived for a project called [http://nodeknockout.com/teams/devcomo](Video Funhouse) in Node Knockout 2013.
It is 24MB. For the original demo, it was around 50MB.
Sure, as long as you follow any relevant FFmpeg license terms. You can also read a copy of the LICENSE file - the ffmpeg.js file is built under the LGPL terms described on the FFmpeg site above.
The usage instructions are still in development. See the test/ directory for a very basic usage example. We are working on bringing a more robust sample app into the repository.
Call ffmpeg_run with an Module object as seen here. Note: this should be done in a worker normally to prevent browser hangs.
Want to build the ffmpeg.js file for yourself? First, make sure you have Emscripten set up:
git clone [email protected]:kripken/emscripten.git
Depending on your system may need to also get the SDK to make sure Emscripten will work. The have documentation on their site about getting this to work.
Once this is all set up and emcc is on your path, you should be able to run:
git clone [email protected]:bgrins/videoconverter.js.git
cd videoconverter.js/ffmpeg_build
./build_lgpl.sh
This is what we are doing with http://devcomo.2013.nodeknockout.com/. Obviously, this could be expanded and optimized. Quite likely to bump up against performance bottlenecks - I wrote about some of the issues we bumped into if you are interested in more information.
We are beginning to build a benchmark to compare different browser performances. It would be interesting to compare performance versus native as well.
This isn't yet compiled with any other static library support (like zlib, x264, libvpx, etc. It should be possible to do though.