[FFmpeg-devel] [PATCH]Support linebreaks in onCaption subtitles

Carl Eugen Hoyos cehoyos at ag.or.at
Mon May 4 12:15:54 CEST 2015

Clément Bœsch <u <at> pkh.me> writes:

> > Carl Eugen Hoyos <cehoyos <at> ag.or.at> writes:
> > 
> > > Clément Bœsch <u <at> pkh.me> writes:
> > > 
> > > > > +    text->linebreaks = "<br/>";
> > > > 
> > > > i'm afraid this won't be enough to support 
> > > > "<br>", "<BR>", "<br />", ...
> > > 
> > > I only looked at the sample we have, are they 
> > > all valid line breaks?
> > 
> > Ping, I don't understand your comment.
> There is nothing to understand: is it explicit in a 
> specs somewhere that the only markup is a line return 
> expressed by the specific string "<br/>", or it's 
> just another HTML-based markup, where "<br>", "<BR>", 
> "<br />" can happen?

Why do you assume that any other tags than <br/> exist?
For how many codecs did we see specifications at the 
time they were implemented? I was testing a sample and 
this is the only feature missing that I can see.

> You are the one implementing this, don't ask me about 
> the details. I'm just wondering about the amount of 
> work it will require to remove that code before 
> implementing it correctly if necessary.

I am just testing existing samples, if you have more 
samples or know where I can find more samples, please 
tell me.

> The main point being that I'm wondering how we are 
> going to explain to our users that we support 
> subtitles with "<br/>", but supporting "<br />" will
> require large changes.

While I don't understand this argument at all, I 
don't think speculating about samples that we don't 
have any reason to believe they exist makes much sense.

> Note: there is a work in progress on the mailing list 
> about factoring out the HTML code from codecs, which 
> includes the support of "br" based tags; it might 
> make more sense then to change the codec to SubRip 
> (because it will support that tag) instead of adding 
> a half-assed codec that will be deprecated soon.

Which thread is this?

Carl Eugen

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