Ogg changes

[Stephen Drake]

Hello all,

I'm not sure if everyone is aware of this, so I'll just put it out
there.

There has been a shift in recommended file extensions and mime types for
Ogg files over the last month and this will probably affect how we
encode the screencasts for distribution (recording is unaffected). 

Basically the change is as follows

Video -> .ogv
Audio -> .oga
other -> .ogx

The current .ogg is rendered legacy/deprecated and will only be used for
Vorbis I, i.e. existing music only files.

Now for the interesting part. It is recommended that the new files
contain a skeleton structure to allow better use of multiple streams,
seeking etc. So we can't just rename the files *.ogg -> *.ogv, for
example.

This means we are going to have to decide how we intend to change the
current encoding methods and also how we will handle the existing
screencasts i.e. do we leave them be and just start afresh or go back
and re-encode?

There is a wiki page on xiph.org detailing the changes,
http://wiki.xiph.org/index.php/MIME_Types_and_File_Extensions

and I think this bug report is also worth reading,
https://bugs.freedesktop.org/show_bug.cgi?id=12890

Thoughts?

Steve