[gst-devel] State change issues when asking for a RTSP stream with VLC
Javier Gálvez Guerrero
javier.galvez.guerrero at gmail.com
Fri Mar 6 15:12:26 CET 2009
Thanks for your answer, Zaheer.
How can I know which plugins/elements are installed in my system? I know
I've installed the core-, base-, ugly- and bad-plugins packages, but how can
I know which elements they provide? I have looked at the GStreamer 0.10
Plugins reference manual but I don't see neither mpegpsdemux nor mpegtsdemux
in the bad plugins reference
manual<http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-bad-plugins/html/>
.
I would like to know how to find this kind of information as it may be
useful for my future development tasks (I need to start with the basic
ideas...=) )
Thank you all,
Javi
2009/3/6 Zaheer Merali <zaheerabbas at merali.org>
> On Fri, Mar 6, 2009 at 10:56 AM, Javier Gálvez Guerrero
> <javier.galvez.guerrero at gmail.com> wrote:
> > Hi,
> >
> > I solved it. I have installed the "bad" plugins compilation and now I get
> > smooth RTP/MPEG-TS playback. I suppose it is because the mplex element.
> >
> > Regards,
> > Javi
>
> It was probably one of the mpeg demuxers mpegpsdemux or mpegtsdemux
> inside gst-plugins-bad that solved your problem.
>
> Zaheer
>
> >
> > 2009/3/5 Javier Gálvez Guerrero <javier.galvez.guerrero at gmail.com>
> >>
> >> Gstreamer MPEG demuxing is in charge of ffmpeg, isn't it? I have updated
> >> ffmpeg to the latest git version but it hasn't solved anything. I have
> also
> >> uninstalled the fluendo MPEG muxers and demuxers plugins with no
> positive
> >> results.
> >>
> >> On the other hand, multicast streaming (not RTSP) MPEG over UDP is
> played
> >> back smoothly, as local files do.
> >>
> >> Has anyone any idea about why I could play properly RTSP/RTP streaming
> >> contents before and now I get choppy playback?
> >>
> >>
> >> Thank you for your time and sorry for the inconvenience,
> >> Javi
> >>
> >>
> >> 2009/3/5 Javier Gálvez Guerrero <javier.galvez.guerrero at gmail.com>
> >>>
> >>> Thanks for your answer, Wim.
> >>>
> >>> So, Gstreamer 0.8 MPEG demuxers worked but those used in 0.10 are not
> >>> working properly?
> >>>
> >>>
> >>> Regards,
> >>> Javi
> >>>
> >>> 2009/3/5 Wim Taymans <wim.taymans at gmail.com>
> >>>>
> >>>> On Thu, 2009-03-05 at 10:28 +0100, Javier Gálvez Guerrero wrote:
> >>>> > Hi,
> >>>> >
> >>>> > I managed this issue by installing the UGLY plugins. However, I
> don't
> >>>> > know if this is the proper way to solve my issue.
> >>>> >
> >>>> > Now I can get the RTSP stream (both from VLC and Live555 RTSP
> servers)
> >>>> > but the video framerate is lower than the original and not stable. I
> >>>> > have checked that all RTP packets are received (sequence numbers are
> >>>> > ok) and I get neither error nor warning messages from Gstreamer, so
> I
> >>>> > don't know what is happening and how I could get a smooth video
> >>>> > playback in RTSP streaming (the same video played locally works
> >>>> > smoothly).
> >>>> >
> >>>> > As said before, I have these problems since I updated Gstreamer from
> >>>> > 0.8 to 0.10, so I don't know if there is any related issue with
> these
> >>>> > problems or if I'm missing something. Anyway, I would like anyone to
> >>>> > help me getting things working, either downgrading to 0.8 (I don't
> >>>> > know where to find this version) or managing with the current 0.10
> >>>> > version I've just installed.
> >>>> >
> >>>>
> >>>> The mpeg demuxers don't support demuxing live streams yet and screw up
> >>>> the timestamps, which makes the result rather choppy.
> >>>>
> >>>> Wim
> >>>> >
> >>>> > Thank you all,
> >>>> > Javi
> >>>> >
> >>>> >
> >>>> > 2009/3/4 Javier Gálvez Guerrero <javier.galvez.guerrero at gmail.com>
> >>>> > Hi there,
> >>>> >
> >>>> > I was using the Gstreamer framework (version 0.8) to get
> some
> >>>> > tests. I used Gstreamer as client and VLC (0.9.4) as RTSP
> >>>> > server and it worked smoothly. The problem has arised when
> >>>> > updating Gstreamer to 0.10.21. When I launch
> "gst-launch-0.10
> >>>> > playbin uri=rtsp://IP:PORT/content it never starts playing
> the
> >>>> > media. Using VLC as a client works ok.
> >>>> >
> >>>> > I can see with Wireshark the RTSP message exchange (PAUSE
> and
> >>>> > then TEARDOWN) and I get these error messages where
> launching
> >>>> > Gstreamer:
> >>>> >
> >>>> > Estableciendo el flujo a PAUSADO ... (PAUSED)
> >>>> > El flujo es en vivo y no necesita PRECACHEADO ...
> (PRECACHED)
> >>>> > Estableciendo el flujo para REPRODUCCIÓN ... (PLAY)
> >>>> > New clock: GstSystemClock
> >>>> > ERROR: desde el
> >>>> > elemento
> >>>> >
> /GstPlayBin:playbin0/GstDecodeBin:decodebin0/ffdec_mpegvideo:ffdec_mpegvideo0:
> >>>> > Internal GStreamer error: negotiation problem. Please file a bug at
> >>>> > http://bugzilla.gnome.org/enter_bug.cgi?product=GStreamer.
> >>>> > Información adicional de depurado:
> >>>> > gstffmpegdec.c(2339): gst_ffmpegdec_chain
> >>>> > ():
> >>>> >
> /GstPlayBin:playbin0/GstDecodeBin:decodebin0/ffdec_mpegvideo:ffdec_mpegvideo0:
> >>>> > ffdec_mpegvideo: input format was not set before data start
> >>>> > Execution ended after 887032082 ns.
> >>>> > Estableciendo el flujo a PAUSADO ...
> >>>> > Estableciendo pipeline a READY...
> >>>> > Estableciendo pipeline a NULL...
> >>>> > LIBERANDO pipeline ... (FREEING)
> >>>> >
> >>>> >
> >>>> > I would like to know how I can solve this issue and, in case
> >>>> > the only solution is downgrading to gstreamer 0.8, could
> >>>> > anybody tell me where can I find it?
> >>>> >
> >>>> > By the way, as you may have noted, I am a newbie in the
> >>>> > Gstreamer framework, but I am quite interested in succeedin
> >>>> > using it. Any help would be much appreciated.
> >>>> >
> >>>> >
> >>>> > Thank you,
> >>>> > Javi
> >>>> >
> >>>> >
> >>>> >
> >>>> >
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