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Mixer captions font size can be changed if necessary depending on mixer outpout output stream resolution:

• for video streams, caption font size if 20pt by default

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Since build 5.2.741 caption text colour and backgroung background colour can be changed with the following parameters

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mixer_text_background_opacity=100

Background opacity shold should be set in percents: 0 for full transparency, 100 for full opacity (text background will be coloured to defined colour). The default value is 100 (fully opaque).

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Since build 5.2.770 it is possible to set captions font using the following param,eterparameter

mixer_text_font=Serif

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If the chosen font contains no characters which are in caption text, those charecters characters will not be displayed.

Caption text autoscaling

Since build 5.2.709 caption text can be autoscaled to fit the picture. The feature is enabled by default with thr the following parameter

mixer_text_autoscale=true

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Since build 5.2.770 it is possible to disable room name displaying (which is set to sream stream name while automatically ading adding stream to mixer). This can be done with the following parameter

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Character '+' will be replaced by whitespace, i.e. in the example aboc=ve above stream can be published with label

test1#m1?label=John+Doe

Speech indicator management

Thikness and position

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Caption location

Since build 5.2.844, it is possible to change location of video participant's caption. By default, caption is located in left bottom corner of video.

It is possible to display caption above video using the following parameter

mixer_text_outside_frame=TOP

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or under video

mixer_text_outside_frame=BOTTOM

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The distance between video and its caption can be changed using the following parameter

mixer_text_outside_frame_padding=70

Speech indicator management

Thickness and position

Speech indicator frame thickness can be set (6 pixels by default)

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