Streaming of a text file

[Nuno Martins]

On 08-08-2014 11:51, Nuno Martins wrote:
>
>     ------------------------------------------------------------------------
>
>     Hi! I'm a new user and i'm trying to build a pipeline that extracts teletext
>     subtitles from a transport stream and sends the text file (with subtitles
>     and timing info) to another computer through udpsink.
>
>     I'm able to create a text file with the subtitles (and I slightly modified
>     the teletext code to print the time as well) with: gst-launch  filesrc
>     location=/(...)TransportStream.ts  ! mpegtsdemux program-number=1 name=demux
>     demux.private_0001 ! teletextdec page=100 subtitles-mode= "true"
>     subtitles-template="%s\n" ! 'text/plain' ! filesink
>     location=(...)/teletext.txt
>
>     The output file is created in real-time, as soon as the teletext decoder
>     receives data.
>     But then I fail to send this file to another computer: I tried with this
>     pipeline
>
>     gst-launch filesrc location=(...)/Transportstream.ts ! mpegtsdemux
>     program-number=1 name=demux demux.private_0001 ! teletextdec page=100
>     subtitles-mode="true" ! 'text/plain' ! udpsink port=6000 async="false" \
>     udpsrc port=6000 ! filesink location= (...)/teletext.txt
>     but, even if I can see the decoding process  working correctly in the debug
>     window, no file is created. I tried adding queues, 'text/plain' caps
>     everywhere but nothing changed.
>     Moreover, at the end the process blocks (on the last subtitle) and doesn't
>     free the pipeline.
>
>     Is there anyone that experienced the same kind of problems? Thank you very
>     much.
>
>
>     Enrico
>
>
>     --
>     View this message in context:http://gstreamer-devel.966125.n4.nabble.com/Streaming-of-a-text-file-tp4518647p4518647.html
>     Sent from the GStreamer-devel mailing list archive at Nabble.com.
>
>
> Hi Enrico,
>
> I have found your message from 2012 and I would like to be sure you 
> could extract subtitles from the teletext because I'm trying to do 
> exactly that but I'm unable to do so.
> The file is created but is empty.
>
> gst-launch-0.10 filesrc location=filename.ts  ! mpegtsdemux 
> program-number=811 name=demux demux.private_0811 ! teletextdec 
> page=887 subtitles-mode= "true" subtitles-template="%s\n" ! 
> 'text/plain' ! filesink location=teletext.txt
>
> I'm using the pipeline described above. The filename.ts was recorded 
> from a dvb and the channel is on the program-number 811 and the 
> subtitles are at the 887 teletext page.
>
> Thank you in advance,
> Nuno Martins
Hi all,

I managed to put it to work. I didn't need to use the program-number.

For me it worked using:

gst-launch-0.10 filesrc location=filename.ts  ! mpegtsdemux ! 
teletextdec page=887 subtitles-mode= "true" subtitles-template="%s" ! 
'text/plain' ! filesink location=teletext.txt

Best regards to all,
Nuno Martins
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