feat: add csv export support

README.md

@@ -2,6 +2,12 @@
 
 A cli tool to export GoPro metadatas from video files.
 
+## Install
+
+`npm install -g gopro-telemetry-exporter`
+
+or just prefix command `npx`
+
 ## Usage
 
 `gopro-telemetry-exporter --input GPX010001.MP4 --output GPX010001.gpx --GPS5Fix 3 --preset gpx --groupTimes 200`
@@ -13,6 +19,10 @@ geojson, csv, mgjson, virb, and other format that can be supported by
 * All other options will be pass directly to [GoPro Telemetry](https://www.npmjs.com/package/gopro-telemetry), you
   can check the list
 
+### Example CSV export of GPS5 stream
+
+`gopro-telemetry-exporter --input GPX010001.MP4 --output test.csv --GPS5Fix 3 --preset csv --groupTimes 200 --stream GPS5`
+
 ## TODO
 
 * Check all the presets

bin/gopro-telemetry-exporter.js

@@ -29,9 +29,12 @@ async function main(options) {
   }
 
   goproTelemetry(res, _.omit(options, ['_', 'input', 'output']), telemetryData => {
-    if (!_.isString(telemetryData)) {
+    if (options.preset === 'csv') {
+      telemetryData = _.values(telemetryData)[0];
+    } else if (!_.isString(telemetryData)) {
       telemetryData = JSON.stringify(telemetryData);
     }
+
     fs.writeFileSync(options.output, telemetryData);
   });