On Jun 11, 2011, at 10:37, Edward Ned Harvey wrote:

>> From: David Magda [mailto:dma...@ee.ryerson.ca]
>> Sent: Saturday, June 11, 2011 9:38 AM
>> 
>> These parity files use a forward error correction-style system that can be
>> used to perform data verification, and allow recovery when data is lost or
>> corrupted.
>> 
>> http://en.wikipedia.org/wiki/Parchive
> 
> Well spotted.  But par2 seems to be intended exclusively for use on files,
> not data streams.  From a file (or files) create some par2 files...
> 
> Anyone know of a utility that allows you to layer fec code into a data
> stream, suitable for piping?

Yes; I was thinking more of the stream-on-disk use case.

A FEC pipe might be a nice undregrad software project for someone. Perhaps by 
default multiplex the data and the FEC, and then on the other end do one of two 
things: de-multiplex things into the next part of the pipe, or split the FEC 
stream into the original to one file and the original data into another.
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