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Islandora / documentation

Contains islandora's documentation and main issue queue.
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Embed VTT into the service file #2064

Open DonRichards opened 2 years ago

DonRichards commented 2 years ago

Instead of relying on a VTT file and a MP4 file separately, we should be combining them within the media service file.

Here's a blog on how this is accomplished within FFMPEG for multiple language embedding.

https://ytmt-stag.com/post/00002_ffmpeg/

Lots more benefits than I've mentioned. This came up in a tech call and it was suggested to add a ticket here for it.

seth-shaw-unlv commented 2 years ago

I did a bit of looking and couldn't confirm that the major browsers support using the embedded caption/subtitle tracks. We should test creating a combined file and then viewing it in browsers before we put a lot of effort into automating a solution.

adam-vessey commented 2 years ago

Not... really sure this is a good idea for general use, as some may want to adjust their VTT by hand... having to extract and re-embed in order to manipulate it seems rather round-about? Otherwise, having to go rederive a service file just to change the VTT seems expensive, without a good chunk of logic avoiding re-encoding if it's just the VTT being changed... but would/should still result in a new version of the video file, wasting storage... but yeah... gets rather complex.