[vdr] Re: teletext for vdr

["Peter Seyringer" <dvrproject@seyringer.priv.at>]

Hello!

I hope to release the next version of the teletext add this week.
There are some problems now:
1) The decoder is not fully implementet, but you can view most of the pages.
Some graphic characters are shown not correct, flash doesn't work and only
characters for german language are are showing correct now.
2) For teletext i must use an internal mpeg encoder because to save the
picture, call an external program, load the mpeg file and send them to the
card needs about 2 secounds on my P2 400 and i think it is to much when i am
zapping teletext. The routines i use are not published now so i can't them
and you can't download them. But the author Dirk Farin tells me, that he
will publish them this week, so you can download them. To view them with
mplayer isn't great because you can't use OSD to show some extra
informations.
3) To show some other information from the teletext i want to use the OSD
Display but it is very buggy (@Klaus: great work from you to handle the osd
so good in vdr)
4) driver bug (isn't realy a bug). I have found if you change the line
flush(avout....) to flush(aout...) in the drivers DISPLAY_STILLIMAGE
function, you can view a single I-Frame without any problems. The driver
authors tells me that is because i don't send any audio frames. Klaus tells
me, that it doesn't change anythink, if he patch the driver.

So please stand by this week!

Peter


----- Original Message -----
From: Gregor Molter <Gregor.Molter@chairos.com>
To: <vdr@linuxtv.org>
Sent: Tuesday, May 07, 2002 5:07 PM
Subject: [vdr] Re: teletext for vdr


> Alessio wrote:
> > Gregor Molter wrote:
> > > Peter used mpeg2encoder with a special partition file for it. Then it
> > > encodes one I-Frame only from a ppm image.
> >
> > partition file?
>
> Ups, sorry. Mpeg2encoder needs a parameter file which includes the type of
> encoding, bitrates, number of ibp-frames, etc.
>
> > > Try to display your I-Frame several times. With Peters method I have
> tocall
> > > his VIDEO_STILLPICTURE function two times to see a picture on my tv.
> >
> > so you use the plain ioctl call from the DVB API, within vdr?
>
> As mentioned above in the thread, the routine is from Peter. If I remember
> correctly he uses the plain ioctl call (I haven't the sources add my hands
> at the moment).
>
> > > May it possible to send the same I-Frame repeatly to the video-decoder
> (as a
> > > type of stream)?
> >
> > isn't this more or less the same work Klaus' routine already tries to do
> > to emulate the not-working API call?
>
> I don't know. I think so, but isn't there a VIDEO_FREEZE state in the
driver
> to pause an active video stream at an I-Frame?
> If it is so it isn't very practicable as we haven't a full stream, or not?
>
> Ciao,
>     -Gregor
>
>
>
>