[FSUG-Bangalore] Can I get a tape of RMS Speech at Christ College?

[Sajith T S]

Vikram Vincent <vincentvikram at gmail.com> wrote:

> I am trying to covert the .dat file to ogg/theora, etc..
> What tool does that? ffmpeg2theora seems to support only .avi ...
> Do I have to first convert the .dat file to .avi?

.dat and .avi are container formats -- they hold together audio and
video tracks, subtitles, synchronisation information, metadata etc,
which are encoded using, umm, whatever codecs.  This isn't obvious
from file extensions, but you can find the actual coding used in the
audio/video streams from mplayer output when you play video.  So if
your .dat contains evil proprietary encoded a/v streams you are likely
to need evil proprietary decoders also.

In theory (in my theory at least!) if you can playback your stuff you
should also be able to convert to theora using ffmpeg2theora or just
ffmpeg, assuimg libtheora etc are present.  However, I'm not sure
codecs in the Windows dll bundle (stuff that are likely present in
/usr/lib/codecs) can do this bit of magic.

Could you tell what went wrong when you tried conversion?