IMSC1 subtitles not working in a HLS stream #4350
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component: HLS
The issue involves Apple's HLS manifest format
component: TTML
The issue involves TTML subtitles specifically
priority: P1
Big impact or workaround impractical; resolve before feature release
status: archived
Archived and locked; will not be updated
type: bug
Something isn't working correctly
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The log is full of warnings like |
joeyparrish
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component: HLS
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Is there an update on this issue. We have a test stream if needed. Thanks. |
joeyparrish
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Jan 30, 2023
Fixes #4350 The current code initially parses the subtitle track as text/vtt (mimetype) since it has no codec. Subsequently, the stpp.ttml.im1t codec is assigned but the mimetype of text/vtt is not changed to application/mp4. This PR changes this so that once the codec is assigned, the mimetype is recalculated.
joeyparrish
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that referenced
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Jan 30, 2023
Fixes #4350 The current code initially parses the subtitle track as text/vtt (mimetype) since it has no codec. Subsequently, the stpp.ttml.im1t codec is assigned but the mimetype of text/vtt is not changed to application/mp4. This PR changes this so that once the codec is assigned, the mimetype is recalculated.
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Have you read the FAQ and checked for duplicate open issues?
What version of Shaka Player are you using?
4.1.1
Can you reproduce the issue with our latest release version?
yes
Can you reproduce the issue with the latest code from
main?yes
Are you using the demo app or your own custom app?
both
If custom app, can you reproduce the issue using our demo app?
yes
What browser and OS are you using?
Windows 11, Microsoft edge/chrome
For embedded devices (smart TVs, etc.), what model and firmware version are you using?
What are the manifest and license server URIs?
https://aka.ms/LowLatencyDemo.m3u8
What configuration are you using? What is the output of
player.getConfiguration()?{
streaming: {
autoLowLatencyMode: true
}
}
setTextTracksVisible(true) or select it from the UI.
What did you do?
Just play the stream
What did you expect to happen?
the captions should be downloaded and visible.
What actually happened?
The fragments of the captions are not getting downloaded and not displayed.
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