[FFmpeg-devel] [PATCH] web: Add end-of-the-year news article

Alexander Strasser eclipse7 at gmx.net
Sun Dec 30 23:04:30 CET 2012


Alexander Strasser wrote:
> Nicolas George wrote:
> > (Sorry, I missed it in the first mail.)
> > 
> > Le nonidi 9 nivôse, an CCXXI, Alexander Strasser a écrit :
> > >   I have a question concerning the concat demuxer: Is it dangerous in the
> > > sense that when used incorrectly incompatible/broken files may be generated?
> > > Or is it trying hard to make sure the input movies fit together?
> > 
> > Right now, it will produce broken files. Adding a check so that it will fail
> > with a clear error message in the most common cases would be relatively
> > easy. Covering all cases would be difficult because it is codec specific:
> > you can concatenate H.264 streams with different resolutions, but not
> > rawvideo streams, or any other codec where global headers are necessary for
> > decoding.
> > 
> > At some point I intend to add more subtle tests / controls.
>   OK, in that case I added a bold warning. Other possibilities would be
> to drop the coverage of the concat demuxer. Opinions on this are welcome.
>   In case we decide to drop if from this article I would be glad to cover
> it in a later one.
> > > +<h4>
> > > +- JSON <a href="ffmpeg-formats.html#tedcaptions">captions for TED talks</a> decoding support
> > > +</h4>
> > > +<p>
> > > +<a href="http://www.ted.com/">TED</a> provides video downloads for their talks.
> > > +But these do not contain the language specific captions that can be enabled
> > 
> > Some (most?) talks can be downloaded with the captions hard-burnt in the
> > video, but not at the highest quality.
>   You are right for some there is a subtitles dropdown in the download
> dialog. I am not sure on which basis it is available or not. The Talks
> I tested previously didn't have it so I came to the wrong conclusion.
> > Mostly unrelated: maybe mention the subtitles hard-burning features?
>   I added an dedicated entry for the subtitles filter and hopefully
> corrected the TED entry. I hope I also addressed the comments by
> Clement.
>   PATCHv2 attached. Please review I will commit later if there are
> no objections.

  Pushed a slightly modified version v3:

  - dropped concat demuxer
  - shortened TED entry


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