Hello Dave,
--On den 1 januari 2004 11:31 +0000 Dave Chapman <[EMAIL PROTECTED]> wrote:
I have just released the first version of a package that creates DVD subtitles (i.e. a set of PNG files for use with spumux/dvdauthor) from DVB teletext subtitles.
This is great!
It currently only works with "Transport Stream" recordings - for example, those made with dvbstream. If you record DVB teletext in a different file format (how does VDR handle this?), and would like support added to dvbtextsubs, then please let me know - it should be trivial.
VDR normally uses a somewhat non-standard PES file format with the audio and video PES packets just mixed, like as PS file without the extra header packets if you will. You can tell VDR to record other PIDs as well, like for example AC3 sound or a teletext PID. Those will get mixed in the stream as well in just the same way.
I haved written a VDR plugin that makes VDR show teletext subtitles. It finds out PIDs and page numbers from the Service Information. It can also record subtitles to the PES/PS stream and play them back.
Since there is no way to map language to page numbers in a PES/PS stream (that information is all in the Service Information), the plugin inserts a home made page 100 with a human and computer parseable index every now and then in the stream. This page is parsed at playback time to select the correct subtitle page. (I still haven't seen it on any other teletext decoder, and I guess no one else has either. :-)
You can get it here: <ftp://ftp.nada.kth.se/pub/home/ragge/vdr/vdr-ttxtsubs-0.0.4b.tgz>
It believe it should be quite easy to make dvbtextsubs eat VDR files, a ps2ts of some sort should do. With a tool to parse my index pages the entire process could be really automatic, including extracting all available languages.
Thanks for your work!
/ragge
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