update readme

README.md

@@ -333,10 +333,12 @@ To save available streams to disk, you can use the `runOnReady` parameter and _F
 paths:
   all:
   original:
-    runOnReady: ffmpeg -i rtsp://localhost:$RTSP_PORT/$RTSP_PATH -c copy -f segment -strftime 1 -segment_time 60 -segment_format mp4 saved_%Y-%m-%d_%H-%M-%S.mp4
+    runOnReady: ffmpeg -i rtsp://localhost:$RTSP_PORT/$RTSP_PATH -c copy -f segment -strftime 1 -segment_time 60 -segment_format mpegts saved_%Y-%m-%d_%H-%M-%S.ts
     runOnReadyRestart: yes
 ```
 
+In the example configuration, streams are saved into TS files, that can be read even if the system crashes, while MP4 files can't.
+
 ### On-demand publishing
 
 Edit `rtsp-simple-server.yml` and replace everything inside section `paths` with the following content: