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articles/azure-video-indexer/language-identification-model.md

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title: Use Azure AI Video Indexer to auto identify spoken languages
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description: This article describes how the Azure AI Video Indexer language identification model is used to automatically identifying the spoken language in a video.
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ms.topic: how-to
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ms.date: 04/12/2020
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ms.date: 08/28/2023
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ms.author: ellbe
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---
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# Automatically identify the spoken language with language identification model
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Azure AI Video Indexer supports automatic language identification (LID), which is the process of automatically identifying the spoken language content from audio and sending the media file to be transcribed in the dominant identified language.
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Azure AI Video Indexer supports automatic language identification (LID), which is the process of automatically identifying the spoken language from audio content. The media file is transcribed in the dominant identified language.
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See the list of supported by Azure AI Video Indexer languages in [supported langues](language-support.md).
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See the list of supported by Azure AI Video Indexer languages in [supported languages](language-support.md).
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Make sure to review the [Guidelines and limitations](#guidelines-and-limitations) section below.
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Make sure to review the [Guidelines and limitations](#guidelines-and-limitations) section.
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## Choosing auto language identification on indexing
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When indexing or [re-indexing](https://api-portal.videoindexer.ai/api-details#api=Operations&operation=Re-Index-Video) a video using the API, choose the `auto detect` option in the `sourceLanguage` parameter.
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When indexing or [reindexing](https://api-portal.videoindexer.ai/api-details#api=Operations&operation=Re-Index-Video) a video using the API, choose the `auto detect` option in the `sourceLanguage` parameter.
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When using portal, go to your **Account videos** on the [Azure AI Video Indexer](https://www.videoindexer.ai/) home page and hover over the name of the video that you want to re-index. On the right-bottom corner click the re-index button. In the **Re-index video** dialog, choose *Auto detect* from the **Video source language** drop-down box.
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When using portal, go to your **Account videos** on the [Azure AI Video Indexer](https://www.videoindexer.ai/) home page and hover over the name of the video that you want to reindex. On the right-bottom corner, select the **Re-index** button. In the **Re-index video** dialog, choose *Auto detect* from the **Video source language** drop-down box.
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![auto detect](./media/language-identification-model/auto-detect.png)
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:::image type="content" source="./media/language-identification-model/auto-detect.png" alt-text="Screenshot showing where to select auto detect.":::
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## Model output
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"transcript": [...],
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. . .
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"sourceLanguageConfidence": 0.8563
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},
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}
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```
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## Guidelines and limitations
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* Automatic language identification (LID) supports the following languages:
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Automatic language identification (LID) supports the following languages:
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See the list of supported by Azure AI Video Indexer languages in [supported langues](language-support.md).
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See the list of supported by Azure AI Video Indexer languages in [supported languages](language-support.md).
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* If the audio contains languages other than the supported list above, the result is unexpected.
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* If Azure AI Video Indexer can't identify the language with a high enough confidence (`>0.6`), the fallback language is English.
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* Currently, there isn't support for file with mixed languages audio. If the audio contains mixed languages, the result is unexpected.
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* Low-quality audio may impact the model results.
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* The model requires at least one minute of speech in the audio.
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* The model is designed to recognize a spontaneous conversational speech (not voice commands, singing, etc.).
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- If the audio contains languages other than the [supported list](language-support.md), the result is unexpected.
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- If Azure AI Video Indexer can't identify the language with a high enough confidence (greater than 0.6), the fallback language is English.
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- Currently, there isn't support for files with mixed language audio. If the audio contains mixed languages, the result is unexpected.
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- Low-quality audio may affect the model results.
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- The model requires at least one minute of speech in the audio.
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- The model is designed to recognize a spontaneous conversational speech (not voice commands, singing, and so on).
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## Next steps
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* [Overview](video-indexer-overview.md)
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* [Automatically identify and transcribe multi-language content](multi-language-identification-transcription.md)
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- [Overview](video-indexer-overview.md)
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- [Automatically identify and transcribe multi-language content](multi-language-identification-transcription.md)

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