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I am using wowza 4.5.0 build18676 version. Recently I am experimenting with multi-track support in wowza VOD streaming. Here are the set of files I have:

sample.mp4 - 1 video track, 2 audio tracks(English, French).
sample_english.vtt - WebVTT subtitle file
sample_french.vtt - WebVTT subtitle file

I would like to know the SMIL configuration for the following scenarios:

Streaming multilingual external VTT subtitle files along with sample.mp4 using HLS streaming protocol in wowza.

For example: I want to do HLS streaming of sample.mp4 and along with it I want to include sample_english.vtt and sample_french.vtt tracks.

I am looking for SMIL file configuration and any wowza server configuration for the above mentioned scenarios. Hope someone would have come across similar scenario. Many thanks in advance.

Raju
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1 Answers1

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Multi webVTT tracks are currently not supported in Wowza. You will need to use TTML sidecar caption files that do support multi-language, which you can then use in a single <textstream> in your SMIL file.

        <textstream src="multi.ttml" system-language="eng">
            <param name="isWowzaCaptionStream" value="true"/>
        </textstream>

SMIL files in Wowza can only have a single textstream parameter.

Michelle-B
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