pbs/pycaption — pull request #28 by scribu (2014-05-15 13:21:29+00:00)
Title: Improve validation when reading WebVTT files

This is the first step in adressing ﻿OCTO-6084: ensuring that WebVTTReader catches most basic errors.

Once this is merged, library users can do something like this:

```python
# generate WebVTT
output = WebVTTWriter().write(input)

# validate generated WebVTT
WebVTTReader().read(output) # will raise errors if the output is invalid
```