When transcoding a video file you have the option of transcoding it with multiple audio tracks, allowing your users to choose the language in which they wish to watch the video.
For the different tracks to be detected during transcoding, the metadata file must include at least 2 languages, with a non-zero attribute, and these 2 languages must be different, otherwise transcoding will not succeed and you will get one of the following error messages:
> Case n°1 "Multi audio tracks file detected without languages in metadata" :
For this error, the metadata file does not contain any language information, the audio tracks are not detected. The metadata file may look like this:
Here is an example of an audio track that includes this famous metadata (in yellow):
Attention : it is imperative that the values of the "Language" field are different between the different audio tracks, otherwise an error "Duplicate audio tracks in metadatas" will be returned by our transcoding system.
> Case n°2 "Duplicate audio tracks in metadatas" :
languages, they have the same language code and transcoding cannot be successful. Here is an example of a file with 2 audio tracks but with the same language code:
Here is an example of an audio track with 2 different language tracks: