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ll_hls_preloader_dir=/opt/preloader

then restart WCS

m4s container support

Since build 5.2.1626 m4s container is supported for HLS segments cut, and since build 5.2.1632 the container is enabled by default for HLS ABR too

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ll_hls_fragmented_mp4=true

You can switch back to the ts container if necessary

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ll_hls_fragmented_mp4=false

Known issues

1. Non-recoverable freeze of HLS stream played in iOS Safari through a CDN

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Solution: do not use LL HLS ABR in iOS Safari

10. HLS ABR may not be played if m4s container is used

Symptoms: HLS ABR segments are not cut with server log message

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02:18:01,957 ERROR HlsAbrStreamProvider - HLS-HTTPS-pool-5-thread-1 Failed to check stream null
java.lang.NullPointerException

Solution: use ts container

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ll_hls_fragmented_mp4=false