Merge pull request #274 from jellyfin/Artiume-patch-1

add subtitle extraction tip

general/clients/codec-support.md

@@ -89,6 +89,20 @@ Subtiles can be a subtle issue for transcoding. Containers have a limited number
 
 <sup>4</sup>DVB-SUB [(SUB + IDX)](https://forum.videohelp.com/threads/261451-Difference-between-SUB-and-IDX-file) is another name for VobSub files.
 
+To extract subtitles, the following commands can be used. The section `0:s:0` means the first subtitle, so `0:s:1` would be the second subtitle.
+
+### SSA Subtitles
+
+```bash
+ffmpeg -dump_attachment:t "" -i file.mkv -map 0:s:1 -c:s ass extracted-subtitle.ass
+```
+
+### Recorded OTA Content
+
+```bash
+ffmpeg -f lavfi -i "movie=Ronin (1998).ts[out+subcc]" -map 0:1  "Ronin (1998).srt"
+```
+
 ### Forced Subtitles
 
 "Forced subtitles are common on movies and only provide subtitles when the characters speak a foreign or alien language, or a sign, flag, or other text in a scene is not translated in the localization and dubbing process. In some cases, foreign dialogue may be left untranslated if the movie is meant to be seen from the point of view of a particular character who does not speak the language in question." - [Wikipedia](https://en.wikipedia.org/wiki/Subtitles#Categories)