I should also have said that the system *does* also handle multiple files already if you modify the GPX file to refer to the relevant audio files at the correct time stamps (as described in the help file).
A preprocessor to do this automatically would be very handy for people who want to work in this way. David On 02/01/2009 12:17, David Earl wrote: > JOSM Audio is designed to sync *continuous* audio with the GPX track. > This means you don't have to fiddle with the recorder buttons every time > you want a voice note, you can just leave it in a pocket; but nor do you > have to listen to inordinate amounts of heavy breathing. > > See the JOSM help file at > http://josm.openstreetmap.de/wiki/Help/HowTo/AudioMapping for details > (or use Help while in JOSM, same thing). > > I too have an Olympus recorder. The clock on mine is about 0.15% out, > which means that a continuous sound track can be many tens of metres out > after an hour's recording, so make sure you at least check whether you > need to calibrate (as described in the help). I guess the time stamps > for multiple files will suffer from the same problem too unless the > recorder sampling rate and the time stamps run off a different clock. > > Note that in the long play mode the Olympus recorder (well, my model, so > I guess all of them) records 4 bit audio, so you'll need to convert it > to 8-bit using Audacity or similar before it is usable in JOSM. This is > quick and easy for one long file, but a bit tedious if you have to do it > for many small files. > > It would be relatively simple to extend the existing functionality to > also process a folder full of time-stamped WAV files, one for each GPX > waypoint; but really it is much easier just to record one long session - > easier to record, easier to preprocess and easier to handle in JOSM. > > Someone mentioned that someone has broken audio in a recent JOSM > version. I haven't had a chance to check yet, but I have made no changes > to the audio recently. > > On a bike, I suggest using a cheapo PC headset (with a bit of sponge > over the mic) rather than the built-in mic as it is completely hands > free then. > > David > > On 01/01/2009 16:58, Gregory wrote: >> I got a new olympus digital voice recorder for Christmas, which means I >> have to use http://code.google.com/p/odvr/ to download the recordings to >> my linux/ubuntu computer. Unfortunatly when downloading the wav files >> the recorded date gets lost, but a table of the times can be displayed >> on the command prompt. >> >> How does JOSM Audio get the date/time of the wav files? >> I tried changing the linux files atime and mtime (last accessed/modified >> time), but the location marker for the audio does not change. Is it >> using the ctime (created time)? I can not change the ctime and it gets >> set to the time the files were downloaded off the voice recorder. >> >> I have filled an issue with the odvr downloader, but I want to confirm >> that it is the ctime that needs to be right for JOSM. I was recording >> ~2sec comments as I passed a location, so I have a trip with 60 >> recordings waiting to be mapped. >> >> My final idea is maybe I could make a JOSM plugin (now I've learnt some >> Java) that takes a fixed-width txt table of time stamps and names, and >> match the times to an open gpx file to create waypoints. This would mean >> I have to open audio files outside of josm, but at least I would know >> where they were recorded. Such a plugin may help people with other media >> problems, ao I wonder has something along those lines already been done? >> >> I've been told audio mapping is more amazing than photo mapping, and it >> would be ideal cycling in these cold winter months. Sadly it's not going >> to well yet, so I hope to get this sorted. >> >> Gregory Marler >> http://www.livingwithdragons.com >> >> >> ------------------------------------------------------------------------ >> >> _______________________________________________ >> talk mailing list >> [email protected] >> http://lists.openstreetmap.org/listinfo/talk > > > _______________________________________________ > talk mailing list > [email protected] > http://lists.openstreetmap.org/listinfo/talk > _______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk
