I agree that georeferencing audio files is a Good Thing. I did some work on georeferencing the audio files from my Olympus voice recorder. They have this 'DSS' file format. It has a header that is readable so I wrote the Audio::DSS perl module to read the meta data.
Of interest is the starting time, ending time (last edited time), and track length. I then synced that up with track logs to create a continuous georeference. Having a single point for an audio recording is probably a good simplification, but it sort of bugs me. I often do sound recording while I'm moving. I would like my recordings to be represented as tracks, rather than single points. Back 'in the day' I had a number of clever names for this. I just checked and all the domains I considered are now being used to sell google ads or cell phone ring tones :-) The simplest use case is for audio travel annotations: local history, geology, etc. A person can record a commentary while traveling ( or create one after the fact to match a specific area ), add the right meta data, including locations for the track, rather than a single point, and rely on sufficiently magic technology to adjust the playback to match the actual speed of the listener. So if something was timed to be heard while travelling 60 mph, it could be adjusted with pauses, or pitch compression, to match your actual speed. The content creator can then also embed 'key frames' into the audio. For example, 'at 55 seconds in, your should be at this location' which allows the commentary to have things like 'look at the road cut into late cretaceous shale on your left, then look right at the alluvial fan into the dried lake.' (okay...the lines are not truly continuous, since they rely on a series of individual positions, but continuous enough. As the quote on electronics goes 'we don't actually know if DC current exists, since we have not been able to measure any DC source for long enough...maybe it just cycles very slowly :-) On 6/3/06, Russ Nelson <[EMAIL PROTECTED]> wrote:
http://russnelson.com/georeferencing-mp3s.html -- --my blog is at http://blog.russnelson.com | When immigration is Crynwr sells support for free software | PGPok | outlawed, only criminals 521 Pleasant Valley Rd. | +1 315-323-1241 | will immigrate. Illegal Potsdam, NY 13676-3213 | Sheepdog | immigration causes crime. _______________________________________________ Geowanking mailing list [email protected] http://lists.burri.to/mailman/listinfo/geowanking
-- Rich Gibson Chief Scientist, Locative Technologies http://mappinghacks.com http://geocoder.us _______________________________________________ Geowanking mailing list [email protected] http://lists.burri.to/mailman/listinfo/geowanking
