Costyn 0 #1 April 18, 2006 Hi everyone, I was messing around with my GPS data today, and with the help of some Perl code to calculate values and generate a subtitle file and MPlayer's mencoder I created this video which shows various data throughout the flight: altitude, glide ratio, heading/bearing, vertical speed, horizontal speed, time, and distance covered so far. I wanted to share it with ya'll. You can find it at SkydivingMovies.com of course. Sorry about the abrupt start and ending. No video editing software was used during the creation of this video! (well, for the capturing I used iMovie but you can hardly call that editing software ). Cheers, Costyn.Costyn van Dongen - http://www.flylikebrick.com/ - World Wide Wingsuit News Quote Share this post Link to post Share on other sites
freakydiver 0 #2 April 18, 2006 Thats cool stuff man! -- (N.DG) "If all else fails – at least try and look under control." -- Quote Share this post Link to post Share on other sites
LouDiamond 1 #3 April 18, 2006 I couldn't get the video to play for some reason. I'm glad to see that others are playing with adding this to their video. I have been doing this with video and digital stills using a SW product called RED HEN for awhile now. Its a bit of overkill for this type of application but there are a few other SW packages and options out there that offer GPS overlay onto digital stills and video and live feeds. Shoot me a PM and we can swap notes."It's just skydiving..additional drama is not required" Some people dream about flying, I live my dream SKYMONKEY PUBLISHING Quote Share this post Link to post Share on other sites
Costyn 0 #4 April 19, 2006 QuoteI couldn't get the video to play for some reason. I'm glad to see that others are playing with adding this to their video. I have been doing this with video and digital stills using a SW product called RED HEN for awhile now. Its a bit of overkill for this type of application but there are a few other SW packages and options out there that offer GPS overlay onto digital stills and video and live feeds. Shoot me a PM and we can swap notes. The video was encoded using MPEG4. So you probably need the XviD codec or alternatively you can download VLC which, unlinke Windows Media Player, will play pretty much anything you throw at it (highly recommended). As for the process: the Perl script converts a GPX track file to an SRT subtitle file, which you can then give to mencoder along with the raw DV dump (or any other format for that matter) to convert to MPEG4. I'll make the perl script available for downloading once I clean it up a little. Cheers, Costyn.Costyn van Dongen - http://www.flylikebrick.com/ - World Wide Wingsuit News Quote Share this post Link to post Share on other sites
Costyn 0 #5 April 20, 2006 QuoteI couldn't get the video to play for some reason. For everyone who couldn't get the other version to play, I've uploaded it to Google VideoCostyn van Dongen - http://www.flylikebrick.com/ - World Wide Wingsuit News Quote Share this post Link to post Share on other sites
Zoter 0 #6 April 20, 2006 Nice work....seeing the data real time too is very nice ! Quote Share this post Link to post Share on other sites
LouDiamond 1 #7 April 20, 2006 I was able to see the Google version. Good job, I know that must have taken a good deal of work to make. Here is frame grab from a video done with Paralog with several of the possible GPS data options selected."It's just skydiving..additional drama is not required" Some people dream about flying, I live my dream SKYMONKEY PUBLISHING Quote Share this post Link to post Share on other sites
KrisFlyZ 0 #8 April 20, 2006 QuoteI was able to see the Google version. Good job, I know that must have taken a good deal of work to make. Here is frame grab from a video done with Paralog with several of the possible GPS data options selected. I have not seen the video yet, but have been doing calculations using GPS coordinates and that is easy to do in Excel. Costyn, Did you use Perl for all your calculations? Kris. The paralog one looks nice. Quote Share this post Link to post Share on other sites
pilotdave 0 #9 April 20, 2006 Costyn uploaded a divx version to skydivingmovies.com too... link stays the same. Dave Quote Share this post Link to post Share on other sites
Costyn 0 #10 April 20, 2006 QuoteCostyn uploaded a divx version to skydivingmovies.com too... link stays the same. Dave Hi Dave, Thanks for replacing the broken version. Apparently I needed to give an extra option so it would place the correct DivX header in the file. I also downsampled the sound some so that it became a bit smaller. QuoteDid you use Perl for all your calculations? Yeah, everything is in Perl. I used an XML module to read in the GPX data. The rest was just searching for the right equations on the Internet. Costyn van Dongen - http://www.flylikebrick.com/ - World Wide Wingsuit News Quote Share this post Link to post Share on other sites
KrisFlyZ 0 #11 April 20, 2006 Just saw the video. Nice work!! With a bearing that changed continuously(even if it was very slight changes at times), Am I correct in assuming that you used a summation of the immediate GPS points to get the distance number? On a 15 sec flight segment I was looking at on one of my flights, even though the bearing change was subtle, the distance was off by almost 10% if calculating a to b using the end points vs...calculating for a to b using all the 15 points. Kris. Quote Share this post Link to post Share on other sites
dragon2 0 #12 April 20, 2006 Since you seem to know what you're doing, you can help me figure out my new gps toy this weekend ciel bleu, Saskia Quote Share this post Link to post Share on other sites
Costyn 0 #13 April 20, 2006 QuoteJust saw the video. Nice work!! Thanks! QuoteWith a bearing that changed continuously(even if it was very slight changes at times), Am I correct in assuming that you used a summation of the immediate GPS points to get the distance number? Yeah, the bearing is calculated between two consecutive points. I guess that might introduce a slight error. QuoteOn a 15 sec flight segment I was looking at on one of my flights, even though the bearing change was subtle, the distance was off by almost 10% if calculating a to b using the end points vs...calculating for a to b using all the 15 points. Hmm... that's a good point. I'm not sure how accurate the floating point numbers are, although I do the rounding only just before they are printed. The total distance is calculated with unrounded numbers. Anyways, as promised, so that everyone can play, a webpage where you can upload your GPX file and get a subtitle file with the calculations in return: GPX to SRT. I've included some notes on how I encoded it (the second time round ). Your mileage may vary. Quote Since you seem to know what you're doing, you can help me figure out my new gps toy this weekend Heh, sure, I'll try. Which one do you have?Costyn van Dongen - http://www.flylikebrick.com/ - World Wide Wingsuit News Quote Share this post Link to post Share on other sites
dragon2 0 #14 April 20, 2006 Garmin Etrex Vista C. Didn't have any choice about the model, I would've liked the smaller one like you have, but oh boy is this a nice toy. Comes with a usb cable too, YES! and it can run off this cable, though it can't actually charge. I need to figure out how and where to mount it and how the thing actually WORKS, besides the great gadget features like the color screen, up- and downloading pictures, welcome message, digi compass, geo caching, games (!) and various beeps (from annoying to MORE annoying LOL). This thing looks like a mobile phone! I love new gadgets ciel bleu, Saskia Quote Share this post Link to post Share on other sites
Nidez 0 #15 April 20, 2006 The video is coded as an FMP4 that is a 4CC style. this will not run using WinAMP, BSPlayer and naturally WinMediaPlayer. What to do ? take an Hex Editor like This and open the file. you will find "FMP4" two times in the first 10 rows of ASCII table. change it in "xvid" the first time and "XVID" the second time. Still expect some little problems with WinMediaPlayer. 4CC (FourCC) come FMP4, che non viene letto da tutti i player. Lo legge solo Mplayer, Totem, Xine e forse VLC, ma niente per WinAMP5, BSPlayer e naturalmente Windows Media Player. Come fare quindi? Prendete un Editor Esdecimale aprite il file, e vedrete nelle prime linee due pezzi di stringa di quattro lettere = FMP4, appunto. La numero 1 la sostituite con xvid (minuscolo), la numero 2 con XVID (maiuscolo). Ora potete aprire il file da qualunque player e vederlo com un comune XVID, ma aspettatevi ancora qualche problemino con WinMediaPlayer.Marco "Pazzo" Pistolesi pistolesi.marco(at)gmail.com Quote Share this post Link to post Share on other sites
Costyn 0 #16 April 21, 2006 QuoteGarmin Etrex Vista C. Didn't have any choice about the model, I would've liked the smaller one like you have, but oh boy is this a nice toy. Cool, that should be a fun toy. We'll take a look at it tommorow. QuoteThe video is coded as an FMP4 that is a 4CC style. this will not run using WinAMP, BSPlayer and naturally WinMediaPlayer. What to do ? take an Hex Editor like This and open the file. you will find "FMP4" two times in the first 10 rows of ASCII table. change it in "xvid" the first time and "XVID" the second time. Still expect some little problems with WinMediaPlayer. Hahaha, cool, a true hacker solution. Re-encode? Bah! Just hex edit the file. Pretty cool. I didn't know this was possible. Anyways, the original FMP4 file has been replaced with one that has the correct DX50 header ('cause it's a DivX), that people seem to be having less trouble with playing. Oh yeah btw I uploaded the same GPS track to TrackingDerby. The mileage is a little less than in the video, because TrackingDerby starts counting 15 seconds after exit. Oh and yes, it was quite windy that day. I'm not that good (yet). Cheers, Costyn.Costyn van Dongen - http://www.flylikebrick.com/ - World Wide Wingsuit News Quote Share this post Link to post Share on other sites
KrisFlyZ 0 #17 April 21, 2006 I was just stating the obvious really. If you take 15 gps points, you can get the total distance by summing the distance between point 1 and 2 and 2 and 3 and so on or by directly calculating the distance between point 1 and point 15. Both will be equal if they all lie on a straight line...if not.... Hope to get an entry into tracking derby this weekend..... Kris. Quote Share this post Link to post Share on other sites
vidiot 0 #18 April 21, 2006 Kris, I'd say except for rounding and other errors, adding up the small pieces is the proper way. If you flew a full circle, did you fly the circimference of the circle or 0?My Logbook Quote Share this post Link to post Share on other sites
KrisFlyZ 0 #19 April 21, 2006 Like I said, I was stating the obvious Kris. Quote Share this post Link to post Share on other sites
medusa 0 #20 April 23, 2006 Costyn: That was so cool I hate you! I'm trying to safe $$ and now I will have to go out and buy a GPS. Thanks YouMedusa Get Killed or Die Trying! Patent pending ATFK15456 Quote Share this post Link to post Share on other sites
Costyn 0 #21 April 23, 2006 QuoteLike I said, I was stating the obvious Kris. Ah, ok, that's what you meant. Yes, I do add up the pieces. Quote That was so cool I hate you! Mad I'm trying to safe $$ and now I will have to go out and buy a GPS. Thanks You Hehehe yeah a GPS is a fun toy to play with indeed. However, be aware that overlaying the data on a video isn't really a trivial excercise (yet), especially encoding the video with the subtitles.Costyn van Dongen - http://www.flylikebrick.com/ - World Wide Wingsuit News Quote Share this post Link to post Share on other sites
Costyn 0 #22 April 23, 2006 QuoteI've included some notes on how I encoded it (the second time round ). Your mileage may vary. I've updated the GPS to SRT page with more information on how to encode the videos under various operating systems. There was little information about doing it under Windows, but I've found out VirtualDub with the VobSub plugin does the job very nicely. See the GPS to SRT page for more information.Costyn van Dongen - http://www.flylikebrick.com/ - World Wide Wingsuit News Quote Share this post Link to post Share on other sites
unclecharlie95 3 #23 February 2, 2011 So I thought I would have a go at overlaying GPS data on a video. At the moment I am stuck converting my Flysight .csv into a .gpx that gpx2srt.exe can read. I have used Paralog to export to .gpx (nice Any ideas greatly appreciated! BASEstore.it Quote Share this post Link to post Share on other sites
Costyn 0 #24 February 2, 2011 Hey James, My gpx2srt tool was never very robust nor very compatible with the somewhat different styles of GPX that do exist (even though it's one standard). But you mention you have Paralog... afaik (never tested it myself), Paralog can embed the same exact stats in your video, just like my tool (only easier as I understand it). CheersCostyn van Dongen - http://www.flylikebrick.com/ - World Wide Wingsuit News Quote Share this post Link to post Share on other sites
mccordia 73 #25 February 2, 2011 I dont know if you have the ability to export seperate txt files for each vallue, but otherwise you can also expoprt/reformat the resulting files via Exell and some simple formulas, and just use them as subtitle overlays in any editing package (1 line, scrolling subtitle). Though the export to a subtitle file directly from paralog should also work quite okay..JC FlyLikeBrick I'm an Athlete? Quote Share this post Link to post Share on other sites
