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====== ffmpeg - Encoding - Set Language ======

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>

----

===== Set language as Unknown =====

<code bash>
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>


----

===== References =====

https://en.wikipedia.org/wiki/List_of_ISO_639-2_codes