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MediaPortal 1
MediaPortal 1 Talk
Teletext subtitles
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<blockquote data-quote="ziphnor" data-source="post: 179529" data-attributes="member: 14215"><p>I see your point but there are several issues here:</p><p></p><p>1. The teletext implementation in MediaPortal is a bit of a mess ( almost zero comments ).</p><p>2. I don't believe it detects the DVB Service information regarding teletext pages (which contains critical language information)</p><p>3. Its unsuitable for subtitle handling because it doesnt provide a way to extract the text , or at least i couldnt find it <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> ( i dont want to render the subtitles in the normal ugly teletext manner).</p><p>4. Subtitle handling should go through one centralized place in order to automates selection and rendering of subtitles. </p><p>5. Handling(/maintaining code for) the full teletext specification is much more complicated than just the subtitle pages.</p><p></p><p>We could put the teletext TS + PES (C++) decoding into another separate directshow filter which could then callback to Mediaportal for each teletext packet it decodes(so no delays), where i by decode means it simply passes each chunk of teletext data to MP. It would then connect to TsReader on its teletext pin (not in SVN) instead of connecting the DVBSubtitle2 filter there. I can implement that without too much trouble ( its mostly copy-paste from DVBSubtitle2).</p><p></p><p>A new/modified teletext module could then receive and cache this information, but it would need to provide callbacks so it could deliver subtitles to the subtitle renderer (in text format along with meta-data on the subtitle stream). I'm not really interested in working on the teletext module as such (my interest is solely with subtitles which are a critical features in the Scandinavian countries), but i would be happy to provide the support needed if you were planning to work on it.</p><p></p><p></p><p></p><p>I am not really familiar with how the server works, so you may very well be correct. I just noted that PidInfo already contained information about being teletext or and then looked at how the DVB subtitle PIDs where handled (and i believe they are recorded/timeshifted correctly?).</p><p></p><p></p><p></p><p>That at least would be a good idea, no matter what we both need teletext data stored in the ts files <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> You could maybe record (and time shift) using TV server and then playback in say DVB viewer (if you have it) or any program capable of showing teletext (sub or not) from .ts files.</p></blockquote><p></p>
[QUOTE="ziphnor, post: 179529, member: 14215"] I see your point but there are several issues here: 1. The teletext implementation in MediaPortal is a bit of a mess ( almost zero comments ). 2. I don't believe it detects the DVB Service information regarding teletext pages (which contains critical language information) 3. Its unsuitable for subtitle handling because it doesnt provide a way to extract the text , or at least i couldnt find it :) ( i dont want to render the subtitles in the normal ugly teletext manner). 4. Subtitle handling should go through one centralized place in order to automates selection and rendering of subtitles. 5. Handling(/maintaining code for) the full teletext specification is much more complicated than just the subtitle pages. We could put the teletext TS + PES (C++) decoding into another separate directshow filter which could then callback to Mediaportal for each teletext packet it decodes(so no delays), where i by decode means it simply passes each chunk of teletext data to MP. It would then connect to TsReader on its teletext pin (not in SVN) instead of connecting the DVBSubtitle2 filter there. I can implement that without too much trouble ( its mostly copy-paste from DVBSubtitle2). A new/modified teletext module could then receive and cache this information, but it would need to provide callbacks so it could deliver subtitles to the subtitle renderer (in text format along with meta-data on the subtitle stream). I'm not really interested in working on the teletext module as such (my interest is solely with subtitles which are a critical features in the Scandinavian countries), but i would be happy to provide the support needed if you were planning to work on it. I am not really familiar with how the server works, so you may very well be correct. I just noted that PidInfo already contained information about being teletext or and then looked at how the DVB subtitle PIDs where handled (and i believe they are recorded/timeshifted correctly?). That at least would be a good idea, no matter what we both need teletext data stored in the ts files :) You could maybe record (and time shift) using TV server and then playback in say DVB viewer (if you have it) or any program capable of showing teletext (sub or not) from .ts files. [/QUOTE]
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Teletext subtitles
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