[gst-devel] DVB pipeline

[Nigel Sim]

Thanks Michael, new errors now.

I've simplified the pipeline to exclude the audio aspects. I have two
attempts here. One reading directly from the dvr device, and the other
reading from a file I captured from the device. Playing both with
mplayer works ok

>From the device
gst-launch-0.10 filesrc location=/dev/dvb/adapter0/dvr0  !
video/mpegts ! ffdemux_mpegts name=d  d.video_00 ! video/mpeg !
mpeg2dec ! xvimagesink
Setting pipeline to PAUSED ...
ERROR: Pipeline doesn't want to pause.
Setting pipeline to NULL ...
FREEING pipeline ...

>From the file
gst-launch-0.10 filesrc location=/tmp/out.ts  ! video/mpegts !
ffdemux_mpegts name=d  d.video_00 ! video/mpeg ! mpeg2dec ! xvimagesink
Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
ERROR: from element /pipeline0/d: GStreamer encountered a general
supporting library error.
Additional debug info:
gstffmpegdemux.c(781): gst_ffmpegdemux_open (): /pipeline0/d:
Unknown error
ERROR: pipeline doesn't want to preroll.
Setting pipeline to NULL ...
FREEING pipeline ...

Many thanks

Nigel

On Wed, 2006-07-12 at 11:19 +0200, Michael Smith wrote:
> On Wed, 2006-07-12 at 19:01 +1000, Nigel Sim wrote:
> > Some time ago I tried to put together a pipeline to decode the stream
> > from my DVB receiver. Tuning was done using tzap (or my own DVB
> > controller app), so /dev/dvb/adaptor0/dvr0 is an MPEG transport stream.
> > It doesn't work, with the error shown below. Can someone either point
> > out what I'm doing wrong, or show me a working DVB receiver stream.
> > 
> > I know there was an issue with using the filesrc, but even if I capture
> > some of the stream to a file first, and try to play that back there is
> > the same error.
> > 
> > gst-launch-0.10 filesrc location=/dev/dvb/adapter0/dvr0  !
> > video/mpegts ! ffdemux_mpegts name=d { d.video_00 ! video/mpeg !
> > mpeg2dec ! xvimagesink } { d.audio_00 ! audio/mpeg ! queue ! ffdec_mp3 !
> > alsasink }
> 
> To begin with:
>   1) gstreamer-0.10 has no { } syntax for gst-launch any more. Just
> remove them.
>   2) You probably want a queue on the video part too
>   3) Don't use ffdec_mp3 for any purpose ever, I don't think it works
> much.
>   4) After your mp3 decoder, add an audioconvert and perhaps an
> audioresample. 
>   5) If it still doesn't work, then there's something else wrong too :-)
> 
> Mike
> 
>