[ogg-dev] How to fix broken ogg/theora files

[Oliver Frommel]

Hello there,

we are among the last people to actually make use of the Ogg/Theora
format. Ok, just kidding, but in fact we do live and archival streaming
of various IT conferences. You can take a look at some here if you are
interested: https://streaming.linux-magazin.de/en

We are using several tools for live streaming, recording and editing
Theora streams, among them ffmpeg2theora and oggCut from oggvideotools
(http://dev.streamnik.de/oggvideotools.html).

Now unfortunately many files are broken, either from interrupting the
recording or cutting.

Examples of error messages follow:
$ oggz-validate jnazario.ogg
jnazario.ogg: Error:
00:55:27.957: serialno 0846930886: Packet out of order (previous
00:55:27.960)
01:05:09.077: serialno 0846930886: Packet out of order (previous
01:05:09.080)

Are there any tools that can reliably fix broken Ogg/Theora files?
What's to be done to create such a tool if there is none yet?

Thanks for your help
Oliver