[gst-devel] State change issues when asking for a RTSP stream with VLC

[Javier Gálvez Guerrero]

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.


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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