Roku Developer Program

[jaycharles]

My HLS server implementation supports injection of SEI data for CEA608 captions, which work fine on Quicktime and VLC.

Is there a brightscript API for reading and displaying CC1 captions in Roku?

Thanks.

[TheEndless]

Currently, only SRT files are supported for captions. Roku is "planning to support closed captioning via SMPTE TimeText in a coming software update" but there's no ETA on that yet.

[jaycharles]

Hmm... sorry to hear that. Seems the rest of the industry is working with CEA608 CC1 via SEI for HLS. Since I'm dealing with live streams, Roku may be a no-go for captioned streams in my use case.

[TheEndless]

As I understand it, SMPTE is the industry standard for broadcast captions. Since most live streams are produced for broadcast (probably too general of a statement), SMPTE makes a lot of sense, as it doesn't require any extra encoding. For what it's worth, I believe Apple already support SMPTE for HLS.

Either way, here's the post with the text I quoted in my previous response: viewtopic.php?f=34&t=51113&p=346903#p346903
RokuPatrick may be able to give you more details, if necessary.