Support rotating subtitles along with video
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- Dominant language
- C
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Description
Expected behavior of the wanted feature
Somewhat related to #6400, but I believe this is a separate concern.
Rotating video currently does not rotate subtitles. This is generally desirable for dialogue text, but for on-screen text rendered diegetically ("Typesetting" or "TS"), it would be more desirable to follow the video. Images below taken from (at time of writing, unreleased) [Kaleido-subs] Blue Archive episode 10.
Normal display
With video-rotate=180
Enabling this for all rendering schemes is probably not a good idea. However, libass has been working towards a "split rendering" system, where TS and dialogue could be rendered in different passes. This could be a good fit as a solution of sorts.
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 reviewing the existing video-rotate handling and libass's proposed split-rendering system. The intended result is for typesetting subtitles to follow video rotation while ordinary dialogue remains unaffected.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- c
- Domain
- audio-video-rtc
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 35/100