[OSM-talk] Continuous audio in JOSM on tracks without waypoints

[J.D. Schmidt]

David Earl skrev:
> On 24/02/2008 22:16, 80n wrote:
>> David
>> I gave it a try today.  The results were excellent.
> 
> Do you have any feeling for how accurate the timer on your audio was by 
> the end of the session?
> 
>> I have some feedback:
>> 1) I found synchronising to be a bit tricky the first time you do it.  
>> This wasn't helped by the fact that I had 20 minutes of tracks before I 
>> started the audio recorder.  I've updated the wiki with what I hope are 
>> clearer and better instructions.
> 
> That was only relevant to the non-waypoint version, so I just moved it 
> up a bit into that section. If you're using waypoints, you'd always sync 
> on a GPS-defined marker, and it is much easier.
> 
> Your instructions are spot on though for the non-waypoint case.
> 
>> 2) While audio is playing, when I clicked on an audio marker it caused 
>> JOSM to hang.
> 
> OK. I'll see if I can reproduce it. Can you be more specific?
> 
>> 3) The Open dialog for audio files does not appear to remember the last 
>> place that was used. Other open dialogs in JOSM do.
> 
> Curious. I'm not aware of doing anything different. Maybe there is an 
> extra step I missed.
> 
>> 4) It would be nice to have keyboard shortcuts for Forward and Backwards.
> 
> OK, can be arranged I'm sure. How about '[' and ']' with '{' and '}' for 
> next and last marker? Assuming the system will let me do that - it 
> wouldn't let me have the spacebar for the play /pause for reasons I 
> don't understand.
> 
>> 5) It would be nice to hide the audio markers without also hiding the 
>> orange cursor.  I don't use waypoints and found that using the orange 
>> cursor and the forward and backward buttons was all that I needed most 
>> of the time.
> 
> I'm surprised your audio was dense enough that you didn't have to jump 
> to new locations using the markers - I get minutes of "silence" when I'm 
> audio mapping. My two hour expedition on Saturday generated 140-odd 
> waypoints, roughly one a minute.
> 
> But again, I imagine that wouldn't be too hard. I hadn't actually 
> realised the play head vanished with the markers. I guess the graphics 
> context I'm given to paint with is that for the layer.
> 
>> 6) Lastly, it would be really nice if it was possible to play the audio 
>> at varying speeds. For long roads if I've made occasionals marks I don't 
>> really want to listen to the whole recording in real time, but there's 
>> not really any way of knowing where the next one will be without 
>> listening to the whole recording.  
> 
> That's why creating waypoints help, but I know from experience with my 
> Garmin, the combination of key presses makes in unfeasible while moving 
> on a bike. The single tap on my adapted version  of MaemoMapper on the 
> Nokia is much, much better in this respect.
> 
> If you're on a bike though you could mimic waypoints though - if you 
> adopt a procedure where you always either speak just after you turn into 
> a junction or when you do a loop loop in the road, then you can use the 
> artificial markers to speed up jumping through the sound track.
> 
>> Variable play speed would help with this.
> 
> I imagine I could fake the sample rate, or something like that. I'll 
> investigate. This is probably a bit more complicated than the rest.
> 
>> Overall I really like it :)
> 
> Thanks. My feeling is that it makes me safer when I'm out mapping, 
> because I don't have trailing wires and don't have to keep pressing the 
> pause on my recorder.
> 
> David
> 

Could this work with video media files ? I've invested in an Oregon 
Scientific ACT2000 solid state helmet cam ( http://tinyurl.com/22zaep )
for use when driving my cityscooter. It has audio input too, but the 
audio tends to be drowned out by the motor and wind sounds. I'm planning 
on using it when mapping, logging data for Wigle and OSM on the laptop 
and the Magellan CrossoverGPS, and filming the route as well as 
roadsigns with the helmet cam (sample movie in DivX format on 
http://www.stage6.com/user/DutchDK ).

Loading up the stream and seeing it in a seperate window in sync with 
the gpx log in JOSM could be great ;)

Dutch