FFmpeg 7.1
Version Matrix Source
7.1 ❭ Sources ❭ Audio ❭ flite
Since* 1.0
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Synthesize a voice utterance using the libflite library.

To enable compilation of this filter you need to configure FFmpeg with --enable-libflite.

Note that versions of the flite library prior to 2.0 are not thread-safe.

The filter accepts the following options:

list_voices

If set to 1, list the names of the available voices and exit immediately. Default value is 0.

nb_samples, n

Set the maximum number of samples per frame. Default value is 512.

textfile

Set the filename containing the text to speak.

text

Set the text to speak.

voice, v

Set the voice to use for the speech synthesis. Default value is kal. See also the list_voices option.

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Examples

  • Read from file speech.txt, and synthesize the text using the standard flite voice: 

    flite=textfile=speech.txt

  • Read the specified text selecting the slt voice: 

    flite=text='So fare thee well, poor devil of a Sub-Sub, whose commentator I am':voice=slt

  • Input text to ffmpeg: 

    ffmpeg -f lavfi -i flite=text='So fare thee well, poor devil of a Sub-Sub, whose commentator I am':voice=slt

  • Make ffplay speak the specified text, using flite and the lavfi device: 

    ffplay -f lavfi flite=text='No more be grieved for which that thou hast done.'

For more information about libflite, check: http://www.festvox.org/flite/