Allow notify subtilte to upper app through event
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- Dominant language
- C
- Stars
- 37k
- Forks
- 3.5k
- Avg merge
- 1d 10h
- Merged PRs (30d)
- 22
Description
Expected behavior of the wanted feature
Currently, on the Android platform, if -vo=mediacodec_embed is used, the subtitles feature becomes completely unavailable. Is it possible to notify the app layer via events or callbacks with the already decoded subtitle (img or text) so that the Android app layer can easily receive each frame of subtitle data (timed text or img) and display them using separate TextView or TextureView ？
If subtitles could be sent to the client as an event or callback just before rendering, apps wouldn't have to worry about synchronizing with low-level primitives. They'd only have to focus on displaying the captioned data. This wouldn't just benefit mediacodec_embed, but all other video outputs (vo) that don't support subtitles.
Alternative behavior of the wanted feature
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Log File
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Sample Files
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Contributor guide
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by tracing the Android mediacodec_embed video-output path and the existing subtitle decoding and event or callback interfaces. Done means decoded timed-text and image subtitle frames can reach the Android app layer before rendering, including for video outputs that do not render subtitles themselves.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- android, c
- Domain
- api, audio-video-rtc, mobile-dev
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100