GoPro GPX Utils

Dealing GPX data from GoPro Hero 6 / 5

Requirements

• mlouielu/gopro-utils
• mlouielu/gpxgo
• mlouielu/gpsbabel

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