ffdec_h264 failure

Jonathan Busby jonathanbusby at gmail.com
Wed Aug 31 15:42:42 PDT 2011

I'm trying to find a less bandwidth intensive way of streaming video from my
Nokia N900's main back camera to my desktop other than sending it as a
stream of jpeg frames.

I thought the following would work :

N900 :  gst-launch v4l2camsrc device=/dev/video0 ! ffmpegcolorspace !
dsph264enc  ! tcpserversink host=aleph1.clarkconnect.lan port=5000

PC : gst-launch tcpclientsrc host= port=5000  ! ffdec_h264 !
ffmpegcolorspace ! autovideosink

but on the PC side I get this error :

Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
ERROR: from element /GstPipeline:pipeline0/ffdec_h264:ffdec_h2640: Internal
GStreamer error: negotiation problem.  Please file a bug at
Additional debug info:
gstffmpegdec.c(2684): gst_ffmpegdec_chain ():
ffdec_h264: input format was not set before data start
ERROR: pipeline doesn't want to preroll.
Setting pipeline to NULL ...
Freeing pipeline ...

Might anyone know what is going on above?


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