[mythtv-users] How to extract subtitles/captions from DVB-T using ProjectX?

UB40D ub40dd at googlemail.com
Sat Jan 10 22:18:25 UTC 2009


On Sat, Jan 10, 2009 at 9:40 PM, Alex Butcher <mythlist at assursys.co.uk>wrote:

> On Sat, 10 Jan 2009, UB40D wrote:
>
> > As we know, mythtranscode destroys the DVB-T subtitles/captions (which by
> > the way are in the stream as character data, not bitmaps).
>
> Are you quite sure about that? I was under the impression that they're in
> the stream as a series of bitmaps, like DVDs.


In ProjectX, the drop-down Presettings > Presettings > Subtitle > Schriftart
even lets you choose which font you want to render them in, for SUP output,
so it's obvious that those bitmaps are being generated on the fly.


> > Has anyone managed to extract the text? If so, what are the steps?
>
> I think you'll need to individually OCR those bitmaps, and concatenate the
> result. Maybe I'll go have a play with gocr.
>

Nonono... see above. If it required OCR I wouldn't even think about it.
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