[gst-devel] Simulating a video camera with a file

Tristan Matthews tristan at sat.qc.ca
Tue Feb 9 19:34:58 CET 2010

2010/2/9 katarina.balac at usi.ch <katarina.balac at usi.ch>

> Hello,
> I am trying to read raw video data from a file and then encode it using
> theora encoder. I would like to use standard test videos such as these:
> http://media.xiph.org/video/derf/  (uncompressed YUV4MPEG, says it is the
> format accepted by the Theora encoder tools)
> http://trace.eas.asu.edu/yuv/
> I have tried with a pipeline like this: filesrc | ffmpegcolorspace |
> theoraenc | oggmux | filesink and the videos from the links above but I am
> getting the Error: not negotiated.
filesrc ! decodebin | ffmpegcolorspace | theoraenc | oggmux | filesink

decodebin is an element to "Autoplug and decode to raw media"


> Everything works if I substitute the file source with the test source
> videotestsrc or a webcam v4l2src but this does not allow me to use standard
> test videos.
> Is something missing in my pipeline or am I using the wrong format?
> Any suggestions will be appreciated.
> Thank you in advance,
> Katarina
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Tristan Matthews
email: tristan at sat.qc.ca
web: http://tristanswork.blogspot.com
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