David This sounds like it will be super cool (sorry about the pun). I'll be trying this out on my next expedition.
Etienne On Wed, Feb 20, 2008 at 6:16 PM, David Earl <[EMAIL PROTECTED]> wrote: > To augment continuous audio synchronized with waypoints that I mailed > about earlier this week, I have now also added the facility to work with > continuous audio recordings on tracks where you don't have or don't want > to use explicit GPS waypoints. This will be in tomorrow's JOSM build. > > After loading your GPX track, right click on the GPX layer and choose > the new "Make Sampled Audio Layer" option. This will ask for your WAV > file; then it will create a new layer combining the audio track with the > GPX trackpoints to produce a set of audio markers laid out along the > track. These will be at least 15 seconds and 75 metres apart, or > whatever values you choose for these in Advanced Preferences settings > for "marker.audiosampleminsecs" and "marker.audiosampleminmetres" > respectively)(*). > > You're then in a similar position to applying audio to explicit > waypoints as per my previous changes: you can synchronise to a marker > near the beginning of the track, play by reference to the visual > position on the map, jump forward and back in the commentary, pause and > resume and so on. > > The sampled markers are named according to the time offset from the > beginning of the sound track (e.g. "1:37", "1:09:07"). To facilitate > this, I've reversed the default for whether to show text for button > markers (audio, image and web), but you can turn these off as before, > transiently from the right button layer menu, or permanently by setting > marker.buttonlabels to false in Advanced Preferences. > > David > > > (*) the defaults are chosen so that they are about the same for a > cyclist travelling at 5 metres per second (about 11mph or 18km/h), so > you get a useful but not overwhelming number of samples, but if you stop > or slow down, you don't suddenly get a concentration of points close > together. Of course if you stop and then record intermittently, you'll > still find it hard to locate the bit of commentary you want - the whole > idea is it is related to landmark junctions or loops you make in the > road or whatever. If you're in a car you might want to set the sample > time a bit shorter, say 7.5 in an urban environment, though the distance > would probably be the same unless you actually want a higher or lower > density, and maybe 60 to 90 seconds apart if walking at a typical 1 m/s. > > _______________________________________________ > talk mailing list > [email protected] > http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk >
_______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk
