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Imgix APIsVideo APISubtitlesSubtitle Source Language

Subtitle Source Language

video-subtitle-lang

Standard render

Beta Feature

This feature is currently in beta. To request access, please contact your account manager or email support@imgix.com.

Forces a specific source language for AI transcription instead of using automatic language detection.

By default, video-generate-subtitles automatically detects the spoken language in the audio. Use video-subtitle-lang to override this and specify the language explicitly.

video-subtitle-lang accepts a valid ISO 639-1 or ISO 639-2 language code.

https://assets.imgix.net/video.mp4?fm=hls&video-generate-subtitles=true&video-subtitle-lang=es

Forcing the source language is useful when:

  • Auto-detection produces inaccurate results for a specific language or accent
  • The audio contains a single known language and you want to skip the detection step
  • The language has limited auto-detection support in the transcription engine

This parameter requires video-generate-subtitles to be set. It controls the transcription source language, not the output language. To deliver subtitles in other languages, use video-subtitle-translations.

Subtitle GenerationSubtitle Translation