mp4ff VS sums_up

Hi, you want to produce fmp4 segments or split into multiple "progressive" mp4s? one of these examples might be useful: https://github.com/Eyevinn/mp4ff/tree/master/cmd/mp4ff-crop https://github.com/Eyevinn/mp4ff/tree/master/examples/segmenter

Part 30 of the MPEG-4 standard describes how TTML and WebVTT subtitles shall be carried in MP4 files. The approaches are very different. For TTML, the original XML structure is used, and there is typically a single sample per segment. That sample is a complete TTML XML document with internal time stamps. Beyond text, it can also provide image subtitles and carry such images as subsamples. The codecs attribute for such a file is stpp, and there is an [stpp] box that should be included in the track sample descriptor. mp4ff supports all relevant boxes.

Now with Ruby we have a few different ideas we want to express. Whereas Daggy has tagged and taggedSum we have Struct and SumsUp.define instead. You can find more info on SumsUp here, but we'll be covering the general details in this post.

Hello, r/ruby! I wrote a gem, sums_up, for defining and pattern matching against sum types at Ruby. This isn't the first attempt at porting sum types into the language, but the other implementations that I've used either didn't "feel like" traditional Ruby, or didn't "feel like" a native sum type implementation. I tried my best to bridge that gap. Code Sample: ‏‏‎ require 'sums_up' # Define a sum type for Users; they can either be anonymous or logged in. User = SumsUp.define(:anonymous, logged_in: :email) # => User anon = User.anonymous # => # logged_in = User.logged_in('[email protected]') # => # anon.anonymous? # => true anon.logged_in? # => false logged_in.anonymous? # => false logged_in.logged_in? # => true anon.email # => NoMethodError: undefined method `email' for # logged_in.email # => "[email protected]" def valid_email?(user) user.match do |m| m.anonymous false m.logged_in { |email| URI::MailTo::EMAIL_REGEXP.match?(email) } end end valid_email?(anon) # => false valid_email?(logged_in) # => true valid_email?(User.logged_in('1337h@ck3r')) # => false There are a few more thorough examples in the README. If you're interested, try it out and let me know what you think!