Re: [Audacity-devel] Add support for importing/exporting SRT subtitles as labels

[Pokechu22 <pok...@gm...>]

After looking over the recently closed pull requests, it turns out PR #170
<https://github.com/audacity/audacity/pull/170> *also* implemented the
subrip format, and that there is a wiki page about using SRT with Audacity
<https://wiki.audacityteam.org/wiki/Movie_subtitles_%28*.SRT%29> by
manually converting the label format.  Our implementations are fairly
similar, but #170 uses wxDateTime and ParseFormat, which seems a lot
simpler.  It shouldn't be too hard to reimplement it based on that.

That PR also used "|" to indicate a newline in the label editor, which is
an interesting choice.  Ideally we'd just support multiline labels
natively, but that's also a good option to consider.

--Poke

On Mon, Oct 14, 2019 at 12:58 PM Pokechu22 <
pok...@gm...> wrote:

> For me at least, I implemented this so that I could caption an audio file
> <https://commons.wikimedia.org/wiki/File:Eisenhower_farewell_address.ogg>.
> Captioning a video file would definitely also work, but that adds a bit of
> complexity regarding positions on screen (which both SubRip and WebVTT
> support to various degrees).  I don't think it's super important for the
> average user (since I don't think many people use labels as is) but I think
> people who have a use for it would benefit greatly.
>
> Barring that, one thing I did not address with SubRip is that it supports
> multiple lines in captions, which is not supported by labels in audacity.
> Beyond just editing, the current text format would not work with multiple
> lines on a single label.  With the current PR I just flattened it into one
> line when importing, but more advanced labels would allow for it.
>
> Code-wise, I would like some advice on how to improve the timestamp
> parsing, since it's rather messy.
>
> Regarding Karaoke: it probably failed to record since it's not rendered
> using the GPU.  An external screen recorder (e.g. OBS
> <https://obsproject.com/>) probably would work.  It probably also would
> be possible to render a video using FFmpeg since I believe you can pipe raw
> video to it and it can encode it, but I don't know enough about that to
> implement it.
>
> Regarding images: I don't think any subtitle format supports those, since
> it would not be machine readable.  It looks like WebVVT might support it through
> CSS <https://w3c.github.io/webvtt/#obtaining-css-boxes>, but it would be
> pretty messy.  I'm not entirely sure how it'd be used, either.
>
> --Poke
>
> On Mon, Oct 14, 2019 at 12:00 PM Robert Hänggi <aar...@gm...>
> wrote:
>
>> I'm 100 % for it.
>> While we're at video:
>> I've tried to make a lyrics video from Audacity by screen capturing
>> the Karaoke  window (with the XBox game bar, Windows+G) but it didn't
>> work for my graphics card.
>> A native way to do it would be great.
>> It would also be nice to be able to import still images into a label
>> and let Audacity export that.
>> Looking forward to your suggestions/PRs.
>> Robert
>>
>> On 14/10/2019, James Crook <cr...@in...> wrote:
>> > We're not doing too well on staying on top of pull requests.
>> > We have 26 open and 338 closed.
>> >
>> > Ideally we'd have one person responsible for ensuring every pull request
>> > got an answer and most of the time have no open pull requests.
>> >
>> > I suspect nothing happened there because no one here had worked with sub
>> > rip format, so noone had an idea of how important (or not) it was.
>> > I don't think support for WebVTT is essential to progressing/accepting
>> > srt support.  I do think if we intend WebVTT, it would be wise to plan
>> > an update to labels.
>> >
>> > --James.
>> >
>> >
>> > On 14/10/2019 18:49, Jonatã Bolzan wrote:
>> >> Hi
>> >>
>> >> I see no discussion about this PR:
>> >> https://github.com/audacity/audacity/pull/170
>> >>
>> >> What do you think? I think this is interesting as Audacity can be used
>> >> for
>> >> video-related projects. In the future, I would be interested in
>> extending
>> >> support for WebVTT if this is something you are interested in.
>> >>
>> >> Thanks for considering.
>> >> --
>> >> Jonatã Bolzan Loss
>> >>
>> >>
>> >>
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>> >
>> >
>>
>>
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