FfmpegWeb

A wrapper for FFMpeg that allow you to transcode video into a web optimised format.
The transcoder provides two modes of encoding depending on your needs:

• Contant Rate Factor (CRF) which will give you the best output quality possible at the expense of potentially having a larger file size
• Two Pass which allows you to specify the desired output file size of the transcode at the expense of potentially having a lower quality

To find out more about this, take a look at FFmpeg's wiki page about it - https://trac.ffmpeg.org/wiki/x264EncodingGuide

Other things to note:

• the output file will overwrite any file with the same name without warning
• the moov atom will be moved to the beginning of the file to allow web playback to begin before the whole file has finished loading
• FFmpeg must be installed

Add this line to your application's Gemfile:

gem 'ffmpeg_web'

And then execute:

$ bundle

Or install it yourself as:

$ gem install ffmpeg_web

Initialize a transcode:

transcoder = FFmpegWeb::Transcoder.new("/path/to/file.avi", "/where/to/output/file")

You don't need to include a file extension to the output file (just a name) since .mp4 will be added by default.

Begin the transcode using default CRF mode:

transcoder.transcode

Begin the transcode using Two Pass mode:

transcoder.transcode(desired_output_size_in_mb)

The transcode method returns an IO pipe object that will stream back the progress percentage of the job.

progress_stream = transcoder.transcode(50)
while progress = progress_stream.gets
    puts progress
end

The transcode method spawns a child process and is non-blocking

1. Fork it ( http://github.com//ffmpeg_web/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request