From c3dd96125aa1d8601b50fd77abfbc7fb8df4c452 Mon Sep 17 00:00:00 2001
From: Stefan Breunig <307954+breunigs@users.noreply.github.com>
Date: Thu, 10 Oct 2024 19:23:08 +0200
Subject: [PATCH] add gpx extraction exiftool formatter

---
 data/gpx_extended.fmt | 28 ++++++++++++++++++++++++++++
 lib/video/source.ex   |  2 +-
 2 files changed, 29 insertions(+), 1 deletion(-)
 create mode 100644 data/gpx_extended.fmt

diff --git a/data/gpx_extended.fmt b/data/gpx_extended.fmt
new file mode 100644
index 00000000..7770e762
--- /dev/null
+++ b/data/gpx_extended.fmt
@@ -0,0 +1,28 @@
+# example usage:
+# exiftool -extractEmbedded -ignoreMinorErrors -printFormat <THIS_FILE> -binary -textOut gpx <VIDEO1> <VIDEO2> …
+#
+#[HEAD]<?xml version="1.0" encoding="utf-8"?>
+#[HEAD]<gpx version="1.0"
+#[HEAD] xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+#[HEAD] xmlns="http://www.topografix.com/GPX/1/0"
+#[HEAD] xsi:schemaLocation="http://www.topografix.com/GPX/1/0 http://www.topografix.com/GPX/1/0/gpx.xsd"
+#[HEAD] creator="ExifTool $ExifToolVersion with extended veloroute.hamburg format">
+#[HEAD]<metadata>
+#[HEAD]  <name>$filename#</name>
+#[HEAD]  <desc>$duration# sec runtime @ @ $rate# real time</desc>
+#[HEAD]  <author>$model @ $firmwareversion</author>
+#[HEAD]</metadata>
+#[HEAD]<trk>
+#[HEAD]<trkseg>
+#[IF] $gpslatitude $gpslongitude $gpsdatetime
+#[BODY]<trkpt lat="$gpslatitude#" lon="$gpslongitude#">
+#[BODY]  <time>${gpsdatetime#;my ($ss)=/\.\d+/g;DateFmt("%Y-%m-%dT%H:%M:%SZ");s/Z/${ss}Z/ if $ss}</time>
+#[BODY]  <ele>$gpsaltitude#</ele>
+#[BODY]  <hdop>$GPSHPositioningError#</hdop>
+#[BODY]  <accel z="${accelerometer;$_=(split ' ')[0]}" x="${accelerometer;$_=(split ' ')[1]}" y="${accelerometer;$_=(split ' ')[2]}"/>
+#[BODY]  <gyro z="${gyroscope;$_=(split ' ')[0]}" x="${gyroscope;$_=(split ' ')[1]}" y="${gyroscope;$_=(split ' ')[2]}"/>
+#[BODY]  <speed gps2dkmh="${gpsspeed#;$_=3.6*$_}" gps3dkmh="${gpsspeed3d#;$_=3.6*$_}">$gpsspeed3d#</speed>
+#[BODY]</trkpt>
+#[TAIL]</trkseg>
+#[TAIL]</trk>
+#[TAIL]</gpx>
diff --git a/lib/video/source.ex b/lib/video/source.ex
index f02196ad..679c863c 100644
--- a/lib/video/source.ex
+++ b/lib/video/source.ex
@@ -79,7 +79,7 @@ defmodule Video.Source do
   @spec timed_points_with_gpx(t()) :: [Video.TimedPoint.t()] | {:error, binary()}
   def timed_points_with_gpx(%__MODULE__{source: source, available_gpx: false}) do
     {:error,
-     "#{Video.Path.source_base_with_ending(source)} has no GPX file available to extract time range from, try `gopro2gpx -s #{Video.Path.source(source)}`?"}
+     "#{Video.Path.source_base_with_ending(source)} has no GPX file available to extract time range from, try `exiftool -extractEmbedded -ignoreMinorErrors -printFormat data/gpx_extended.fmt -binary -textOut gpx #{Video.Path.source(source)}`?"}
   end
 
   def timed_points_with_gpx(%__MODULE__{} = self) do