[MPlayer-users] SVCD subtitle info

[Louis Tsui]

Hi,

In case you don't know it, the following info. maybe useful to the
developers. It is copied from VCDImager manual.

P.S., does developers still need more PS2 video samples? I have some
and mplayer gives no sound when playing.

Regards,
Louis


 2.5.2.2 SVCD Subtitles

There exist two major subtitle formats for SVCD's, of which only one
is officially supported. The non-compliant one has it's origin in the
so-called CVD format, a competitor for the Video CD 2.0 successor. The
real SVCD subtitle format is part of the Super Video Specification,
wheras the CVD-style subtitle format is not. Alas the latter one is
more widely used, due to older pre-SVCD aged software only supporting
the non-compliant CVD subtitle format.

Compliant SVCD subtitles are transported in a private_stream_1 stream
with only the private_data_id 0x70(19). The sub_stream_id is used to
distinguish between the 4 available subtitle channels.

As of the time of writing, there is only a proof of concept
implementation (read hack) for creating proper SVCD subtitles. The
source code is available from the contribs download directory, but its
use is not recommended for production use. If you are searching for a
new free software project, you could take this as an idea...

(19)

While AC3 tracks use the private_data_id 0x80+, DVD subtitles 0x20
onwards and CVD subtitles 0x00 and up.