GoPro GPX Utils
Dealing GPX data from GoPro Hero 6 / 5
Requirements
Don't ask me why there have three fork......
HOWTO
Extract GPX from GoPro Video
$ go get -u github.com/mlouielu/gopro-utils/bin/gopro2gpx
$ ffmpeg -y -i GX010211.MP4 -codec copy -map 0:2 -f rawvideo GX010211.bin
$ gopro2gpx -i GX010211.bin -o GX010211.gpx
Convert GPX to subrip (srt) file
Git clone down gpsbabel from mlouielu/gpsbabel:speed-up
$ git clone https://github.com/mlouielu/gpsbabel
$ cd gpsbabel
$ git checkout speed-up
$ ./configure
$ make -j8
$ ./gpsbabel
GPSBabel Version 1.5.4. http://www.gpsbabel.org
Usage:
./gpsbabel [options] -i INTYPE -f INFILE [filter] -o OUTTYPE -F OUTFILE
./gpsbabel [options] -i INTYPE -o OUTTYPE INFILE [filter] OUTFILE
...
Convert .gpx to .srt
$ ./gpsbabel -t -i /path/to/input.gpx -o subrip -x track,speed -F /path/to/output.srt
$ cat /path/to/output.srt
1
00:00:00,379 --> 00:00:00,654
0.0 km/h 38 m
11:50:30 Lat=24.81410 Lon=120.96907
2
00:00:00,654 --> 00:00:03,459
3.4 km/h 38 m
11:50:30 Lat=24.81411 Lon=120.96907
3
00:00:03,459 --> 00:00:04,009
1.5 km/h 37 m
11:50:33 Lat=24.81411 Lon=120.96907
4
00:00:04,009 --> 00:00:04,979
1.5 km/h 37 m
11:50:34 Lat=24.81411 Lon=120.96907
5
00:00:04,979 --> 00:00:05,439
1.4 km/h 37 m
11:50:34 Lat=24.81411 Lon=120.96907
...
Less point in GPX (GoPro have ~18Hz of GPS data)
$ ./gpsbabel -t -i gpx -f /path/to/input.gpx -o subrip -x track,speed -x simplify,count=500 -F /path/to/output.srt
SCRIPTS
sub.py
This script will auto extrat gpx data from GoPro Videos. And generate .ssa subtitle, .gpx GPS data.
Prerequirements
You should install all the stuff here metion before (3 fork version things, and ffmpeg), and asspy, gpxpy Python packages.
HOWTO Use
usage: sub.py [-h] [--inputs INPUTS [INPUTS ...]]
$ python sub.py -i GX010010.MP4
...
$ ls
GX010010.MP4 GX010010.ssa GX010010.gpx
ffmpeg
Common use (convert to 720p)
$ ffmpeg -i GX010010.MP4 -s hd720 -c:v libx264 -crf 23 -preset slow out.mp4
Merge subtitle into the video
$ ffmpeg -i GX010010.MP4 -vf 'ass=GX010010.ssa' out.mp4
Cut the video, and with subtitles (2 step)
$ ffmpeg -ss 100 -i GX010010.ssa GX010010_seek.ssa
$ ffmpeg -hwaccel vaapi -ss 100 -t 6 -i GX010010.MP4 -vf 'ass=GX010010_seek.ssa' -s hd720 -c:v libx264 -crf 23 -preset slow out.mp4