The existing code will segfault if a closing tag shows up when there
was never an opening tag. This isn't a well formed style, but it's also
not a reason to crash.
Fixes: https://trac.ffmpeg.org/ticket/6303
This patch takes care of the secondary color changes in ASS through highlight and hilightcolor boxes.
Signed-off-by: Niklesh <niklesh.lalwani@iitb.ac.in>
This patch reorganizes the code to make it easier to add support for different text modifier boxes and other styles in the future.
Signed-off-by: Niklesh <niklesh.lalwani@iitb.ac.in>
This change introduces a basic encoder for 3GPP Timed Text subtitles,
also known as TX3G, Quicktime subtitles, or "movtext" in the existing
code.
This initial change doesn't attempt to write styling information,
and just writes the plain text of the subtitles. I intend to add
support for styles eventually, but it's challenging due to a lack
of existing players that support them.
Note that an additional change is required to the mov/mp4 muxer to
write empty subtitle packets to indicate subtitle duration.
Signed-off-by: Philip Langdale <philipl@overt.org>
Philip Langdale
Clément Bœsch
Niklesh
Reimar Döffinger
Michael Niedermayer