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| author | Matthew Heaney <matthewjheaney@google.com> | 2013-07-08 16:25:30 -0700 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2013-07-09 03:09:12 +0200 |
| commit | 509642b4bd8411d3a6965e97cf7dacc3c45fe92a (patch) | |
| tree | d6a254a7b1013368527250a30a9a71e4ec853a10 /libavformat/matroska.h | |
| parent | a20f049c2ab5c0d6cfd4c491cb3b9a16db33b683 (diff) | |
| download | ffmpeg-509642b4bd8411d3a6965e97cf7dacc3c45fe92a.tar.gz | |
WebM muxer writes WebVTT subtitle track
The Matroska muxer now allows WebVTT subtitle tracks to be written
while in WebM muxing mode.
WebVTT subtitle tracks have four kinds: "subtitles", "captions",
"descriptions", and "metadata". Each text track kind has a distinct
Mastroska CodecID and track type, as described in the temporal
metadata guidelines here:
http://wiki.webmproject.org/webm-metadata/temporal-metadata/webvtt-in-webm
When the stream has codec id AV_CODEC_ID_WEBVTT, the stream packet is
serialized per the temporal metadata guidelines cited above. The
WebVTT cue is written as a Matroska block group. The block frame
comprises the WebVTT cue id, followed by the cue settings, followed by
the cue text. (The block timestamp is synthesized from the cue
timestamp.)
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavformat/matroska.h')
| -rw-r--r-- | libavformat/matroska.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/libavformat/matroska.h b/libavformat/matroska.h index af662bea4d..886a34636d 100644 --- a/libavformat/matroska.h +++ b/libavformat/matroska.h @@ -230,6 +230,7 @@ typedef enum { MATROSKA_TRACK_TYPE_LOGO = 0x10, MATROSKA_TRACK_TYPE_SUBTITLE = 0x11, MATROSKA_TRACK_TYPE_CONTROL = 0x20, + MATROSKA_TRACK_TYPE_METADATA = 0x21, } MatroskaTrackType; typedef enum { |