A tool for creating HTML5-ready video
Sli Video takes a directory of high quality MP4 source videos and converts them into derivatives for use with the HTML5 video tag. Derivatives produced for each video include an MP4, using HandBrake, and WebM and PNG, using avconv. The MP4 and WebM can be used as sources for the video element and the PNG taken from the first frame can be used as the poster image.
Because some browsers do not know about HTML5 video and this script does not create an OGV for other browsers that do, the suggestion is to use a Flash fallback in conjunction with these video sources.
The script wraps other commandline tools.
- A *nix system (requires
cat) - avconv
- HandBrakeCLI
- There may be other required libraries needed to create H.264 MP4s, WebMs, and PNGs?
This is not yet ready for rubygems, so run it from source or do the following to install it.
rake build
gem install 'pkg/sli_video-0.0.1.gem'
Use the sli_video_setup.rb script to create the necessary workflow directories. Make certain that the storage volume has sufficient space for video originals, derivative PNGs, MP4s, and WebM files as well as intermediary temporary files.
mkdir ~/tmp/my_video_workflow #or whatever you want to name it
sli_video_setup.rb ~/tmp/my_video_workflow
To append a common snippet of video to the end of each video, place a file endscreen.mpg (an MPEG-1 file) at ~/tmp/my_video_workflow/endscreen.mpg. At this point the script relies on this file being present
Put some video to be processed within ~/tmp/my_video_workflow/to-process. (I use MP4 source files.) Then run the processing script.
sli_video.rb ~/tmp/my_workflow_directory /path/to_ship/videos
In my setup I have a remove volume mounted as my video workflow directory. Other folks also have access to the directory and can place videos to be processed in the to-process directory. Then there is a remote directory where the videos are served up from (known as the "ship_directory" here). I am using this script for an oral history project so all filenames start with a last name and a dash like "name-title_of_clip.mp4". When I ship (or move) the files up to the web server, they get organized by the name and then full filename. So if the original filename is "name-title_of_clip.mp4" then you get the following directory structure.
ship_directory
└── name
└── name-title_of_clip
├── name-title_of_clip.mp4
├── name-title_of_clip.png
└── name-title_of_clip.webm
Jason Ronallo
See LICENSE.