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3 commits

Author SHA1 Message Date
Jan Ekström
3ef5a8ba2b avcodec/ttmlenc: add initial support for regions and styles 
Attempts to utilize the TTML cell resolution as a mapping to the
reference resolution, and maps font size to cell size. Additionally
sets the display and text alignment according to the ASS alignment
number.

Signed-off-by: Jan Ekström <jan.ekstrom@24i.com>
 2021-04-26 16:40:31 +03:00
Jan Ekström
464d6ed98d avformat/ttmlenc: enable writing out additional header values 
This way the encoder may pass on the following values to the muxer:
1) Additional root "tt" element attributes, such as the subtitle
   canvas reference size.
2) Anything before the body element of the document, such as regions
   in the head element, which can configure styles.

Signed-off-by: Jan Ekström <jan.ekstrom@24i.com>
 2021-04-26 16:40:31 +03:00
Jan Ekström
18713d22a2 avcodec: add TTML encoder 
Enables encoding of other subtitle formats into TTML paragraphs.

Signed-off-by: Jan Ekström <jan.ekstrom@24i.com>
 2021-03-05 19:45:00 +02:00