Not sure what version #667 is, but I have the same issue running on version 1.6.0-639 with M2 chip, I have tried to add **+language_name** tag, but didn't help. Someone mention a similar issue under [#659](https://github.com/axiomatic-systems/Bento4/issues/659#issuecomment-1372841466). Not sure if this is a bug after the Apple Silicon build.

Edit: I also tried on windows and got "ERROR: cannot access local variable 'language_name' where it is not associated with a value"
Subtitles (WebVTT) not added to HLS playlist when running mp4dash with --hls
This is a GitHub Issue
repo:Bento4
owner:axiomatic-systems
Title : Subtitles (WebVTT) not added to HLS playlist when running mp4dash with --hls
Issue date:

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Not sure what version #667 is, but I have the same issue running on version 1.6.0-639 with M2 chip, I have tried to add **+language_name** tag, but didn't help. Someone mention a similar issue under [#659](https://github.com/axiomatic-systems/Bento4/issues/659#issuecomment-1372841466). Not sure if this is a bug after the Apple Silicon build.

Edit: I also tried on windows and got "ERROR: cannot access local variable 'language_name' where it is not associated with a value"
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