> Its a multiplexer / authoring issue. > > You need to: > a) Extend the multiplexer so it can correctly chunk the SVCD subtitle > streams (not hard actually) for muxing.
This is a mplex issue, right ? I had a quick look at the mplex code. It seems Do I just have to create a SubtitleStream class that inherits from ElementaryStream ? I'm glad it seems to be "not hard actually", because the subclasses of ElementaryStream are quite complicated in mplex. > b) Find some way of telling the multiplexer *when* each subtitle image > should be muxed. Multiplexor::Multiplex searches for "the ready-to-mux stream with the most urgent DTS". It looks like the ElementaryStream subclasses carry all the needed information to tell when a packet should be muxed. Is that right ? Multiplexor::Multiplex only uses ElementaryStream::RequiredDTS and ElementaryStream::MuxPossible to find the next stream to multiplex. Do I just have to reimplement ElementaryStream::MuxPossible (RequiredDTS is not virtual) ? > c) Find some way of generating subtitles and/or translating them from DVD > to SVCD. Yes, I obviously need a subtitle stream. I'll have a look at that, but it shouldn't be too difficult. It is quite easy to extract the raw DVD subtitles, and it shouldn't be too difficult to convert them to the SVCD subtitle format. On the other hand, generating a subtitle stream from text would be more difficult, as different issues like fonts, color, size and placement have to be solved. That's a complete project in itself, and I'm not too interested in that right now (my first goal is to get mplex to handle SVCD, DVD and maybe CC subtitle streams correctly). It might be a good idea to have a look at all the subtitle-related open-source codes (decoding in mplayer and xine, extraction and conversion in transcode, ...), and create a subtitle converter that would handle most of the commonly used formats. I'm not very familiar with the different subtitle formats used by SVCDs and DVDs (SVCD, DVD and CC, are there other ones ?), so any information is welcome. Any help with the mplex code will also be very appreciated. Laurent Pinchart ------------------------------------------------------- This SF.net email is sponsored by: SF.net Giveback Program. SourceForge.net hosts over 70,000 Open Source Projects. See the people who have HELPED US provide better services: Click here: http://sourceforge.net/supporters.php _______________________________________________ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
