Thanks a lot. I was hoping, I guess, that there was some standard for simply whacking a GPX file inside an MPEG4 container, and maybe even a viewer for such files... Would be doable to make a system that relies on parallel files, i.e. a GPX of the same name as the video file, and a viewer that would plot a marker on a map as the video progressed. The GPX could be trimmed to match the start and end of the video, thus avoiding any video timing issues.
- L On 27 Mar 2010, at 19:43, [email protected] wrote: >> Does anyone have any experience interleaving GPS traces with video? >> >> Some friends of mine are asking about it in relation to skiing and >> motor-racing, but one could also imagine it being of use to mappers. >> Ideally I'd like to look up a "time since start of shot" and find the >> location. You could also look at such a system as generating ~30 >> geo-referenced photos per second. Are there any video formats that handle >> this in one file, or standards for having a GPX alongside a video file? >> > > There is some mention of video mapping on the wiki: > http://wiki.openstreetmap.org/wiki/Video_mapping > > along with audio mapping: > http://wiki.openstreetmap.org/wiki/Audio_mapping > > There was a posting on this list a while ago (1 1/2 years or something) > where someone had overlayed a 2D barcode containing lat/long onto the > video frame. > > Personnally I think that it is a real head-ache to try and synchronise the > data track with audio/video, so would suggest that you try to do it at the > time that the video is recorded. > > Using an OpenTracker (http://www.argentdata.com/products/otplus.html) you > could encode the GPS information as audio tones as the camcorder runs. > Open tracker also collects/reports other telemetry with the same system > (temp, voltage, counts, etc). > > In post production these could be decoded (with 'multimon') and added as > an overlay, or even processed into a subtitle file. > > Let us know if you succeed in you challenge, > Simon > _______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk
