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--- ffmpeg:encoding:set_language [2023/11/02 09:58] – created peter
+++ ffmpeg:encoding:set_language [2023/11/02 10:24] (current) – peter
@@ Line 2: / Line 2: @@
 FFMPeg uses the [[https://en.wikipedia.org/wiki/List_of_ISO_639-2_codes|ISO 639-2]] codes.
+----
+===== Set language on a stream =====
+<code bash>
+-metadata:s:1 language=eng
+</code>
+<WRAP info>
+**NOTE:** Sets metadata language to eng on the stream id 1 (which is, in typical cases, the first audio stream).
+</WRAP>
+----
+===== Set language on first subtitle stream =====
+<code bash>
+-metadata:s:s:0 language=eng
+</code>
+<WRAP info>
+**NOTE:** Sets the metadata language to eng on the first subtitle stream.
+</WRAP>
+----
+===== Set language for specific streams =====
+<code bash>
+-map 0:v \
+-map 0:1 -metadata:s:a:0 language=zxx \
+-map 0:2 -metadata:s:a:1 language=eng \
+-map 0:3 -metadata:s:a:2 language=fra \
+-map 0:4 -metadata:s:a:3 language=kin
+</code>
+<WRAP info>
+**NOTE:**  The standard includes some codes for special situations:
+  * mis, for "uncoded languages";
+  * mul, for "multiple languages";
+  * qaa-qtz, a range reserved for local use.
+  * und, for "undetermined";
+  * zxx, for "no linguistic content, not applicable";
+</WRAP>
 ----
@@ Line 10: / Line 57: @@
 ffmpeg -i in.mkv -map 0:a -metadata:s:a:0 language="und" -metadata:s:a:0 title="Just Music" out.mkv
 </code>
+<WRAP info>
+**NOTE:**  **und** stands for Undetermined.
+The standard includes some codes for special situations:
+  * mis, for "uncoded languages";
+  * mul, for "multiple languages";
+  * qaa-qtz, a range reserved for local use.
+  * und, for "undetermined";
+  * zxx, for "no linguistic content, not applicable";
+</WRAP>
 ----