I s On Wed, Mar 11, 2015 at 12:04:01AM +0200, Salah-Eddin Shaban wrote: > MPlayer (and mpv) converts all text to SSA in order to use libass. > There's no other way to use libass.
I see, thanks for the explanation (I always assumed that libass can render other subtitle formats because of this). Regards, Khaled > And, again, I don't think that's the best option. The FreeType module > in VLC is very mature, it does not feel right to just dump it instead > of walking that last mile to support complex-scripts. And besides, > there's work to be done either way, but I prefer to learn about the > Bidi algorithm and complex-script shaping than converting between > subtitle formats :) > > The latter won't help me with other projects I'm currently > contemplating. Like adding complex-script support to some text > editors. > > On Tue, Mar 10, 2015 at 7:43 PM, Khaled Hosny <[email protected]> wrote: > > At least mpv seems to be using libass to render all subtitles, so it might > > be worth checking what are they doing. > > > > Regards, > > Khaled > > > > On Mar 10, 2015 12:20 PM, "Salah-Eddin Shaban" <[email protected]> > > wrote: > > > >> That's right. VLC uses libass to render SSA/ASS subtitles. But it has > >> its own text rendering modules to render other subtitle formats. > >> > >> The most common format usually found on sites like opensubtitles.org > >> is SubRip (.srt). > >> So to use libass here the user has to convert the files to SSA > >> beforehand, or VLC should convert the text to SSA at runtime, which is > >> not the best option. > >> > >> On Tue, Mar 10, 2015 at 4:35 AM, Behdad Esfahbod > >> <[email protected]> wrote: > >> > Hi there, > >> > > >> > That's very nice. Thanks for sharing. > >> > > >> > That said, I was under the impression that VLC could already use > >> HarfBuzz / > >> > FriBidi to render subtitles using libass. Is that not the case? > >> > > >> > behdad > >> > > >> > On 15-03-08 12:58 PM, Salah-Eddin Shaban wrote: > >> >> Hello, > >> >> > >> >> I would like to thank you very much for HarfBuzz. > >> >> > >> >> I'm currently trying to use it to add complex-script support to the > >> >> text renderer of VLC Media Player, mainly for Arabic subtitle files. I > >> >> tried first using Pango but was told there were compatibility issues > >> >> with GLib, so HarfBuzz is the way to go. > >> >> > >> >> I had to struggle a little with the Unicode bidirectional algorithm > >> >> and with getting to understand how Fribidi, FreeType, and HarfBuzz > >> >> work together. Documentation is rather scarce so I had to dig through > >> >> some source code, and to experiment with a test application. > >> >> > >> >> I still can't claim to understand everything about the algorithm or > >> >> the process of rendering text. When I compare my code to the source > >> >> code of Pango it seems too simple to be correct. But it's producing > >> >> correct results, as far as I can see, for all text I test it on, and > >> >> not just subtitle files. > >> >> > >> >> Anyway, I thought it might help someone get the general picture, if > >> >> you think it's appropriate as another user example on the HarfBuzz > >> >> wiki. > >> >> > >> >> Any comments or corrections are greatly appreciated. > >> >> > >> >> https://github.com/salshaaban/BidiRenderer > >> >> _______________________________________________ > >> >> HarfBuzz mailing list > >> >> [email protected] > >> >> http://lists.freedesktop.org/mailman/listinfo/harfbuzz > >> >> > >> _______________________________________________ > >> HarfBuzz mailing list > >> [email protected] > >> http://lists.freedesktop.org/mailman/listinfo/harfbuzz > >> _______________________________________________ HarfBuzz mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/harfbuzz
