[FFmpeg-devel] GSoC 2025 - OggKate subtitles support

[FFmpeg-devel] GSoC 2025 - OggKate subtitles support

[Gianluca Cannata]

Good morning,

I have to write a karaoke solution with FFmpeg libav libraries for a
project of mine and I have found OggKate subtitles a good choice to
implement such solution and I am thinking of writing a Kate demuxer and
decoder along with a filter that will use OpenGL to render Kate subtitles
capabilities on frame.

What do you think ?

There is someone interested in mentoring this proposal project ?

Or is it too overkill ?

Sincerely

Gianluca
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Re: [FFmpeg-devel] GSoC 2025 - OggKate subtitles support

[Nicolas George]

Gianluca Cannata (HE12025-03-04):
> I have to write a karaoke solution with FFmpeg libav libraries for a
> project of mine and I have found OggKate subtitles a good choice to
> implement such solution and I am thinking of writing a Kate demuxer and
> decoder along with a filter that will use OpenGL to render Kate subtitles
> capabilities on frame.
> 
> What do you think ?

I think I have never encountered an Ogg Kate file in the wild and I do
not know of any specific software that supports them. That makes me
think Ogg Kate is one of these dead Xiph projects and supporting it
would be a waste of time.

Which features do you require for your project?

Regards,

-- 
  Nicolas George
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Re: [FFmpeg-devel] GSoC 2025 - OggKate subtitles support

[Gianluca Cannata]

Hi Nicolas,

I would like to add motion to subtitles like fading, scrolling, changing
colors and font size, eccetera.

Is it something that can be of public interest ?

If not, which mailing list is the most appropriate to ask support for
implementing such a thing ?

Sincerely

Gianluca

Il giorno mar 4 mar 2025 alle ore 11:46 Nicolas George <george@nsup.org> ha
scritto:

> Gianluca Cannata (HE12025-03-04):
> > I have to write a karaoke solution with FFmpeg libav libraries for a
> > project of mine and I have found OggKate subtitles a good choice to
> > implement such solution and I am thinking of writing a Kate demuxer and
> > decoder along with a filter that will use OpenGL to render Kate subtitles
> > capabilities on frame.
> >
> > What do you think ?
>
> I think I have never encountered an Ogg Kate file in the wild and I do
> not know of any specific software that supports them. That makes me
> think Ogg Kate is one of these dead Xiph projects and supporting it
> would be a waste of time.
>
> Which features do you require for your project?
>
> Regards,
>
> --
>   Nicolas George
> _______________________________________________
> ffmpeg-devel mailing list
> ffmpeg-devel@ffmpeg.org
> https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
>
> To unsubscribe, visit link above, or email
> ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".
>
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Re: [FFmpeg-devel] GSoC 2025 - OggKate subtitles support

[Nicolas George]

Gianluca Cannata (HE12025-03-04):
> I would like to add motion to subtitles like fading, scrolling, changing
> colors and font size, eccetera.

ASS already supports all this. Have you tried using it for your project?

> Il giorno mar 4 mar 2025 alle ore 11:46 Nicolas George <george@nsup.org> ha
> scritto:

Top-posting is forbidden on this mailing-list. If you do not know what
it means look it up.

Regards,

-- 
  Nicolas George
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Re: [FFmpeg-devel] GSoC 2025 - OggKate subtitles support

[Gianluca Cannata]

> ASS already supports all this. Have you tried using it for your project?

I have not tried yet. I will have.

> Top-posting is forbidden on this mailing-list. If you do not know what
it means look it up.

Sorry.

Thank you again for your support.

Sincerely

Gianluca
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