Encoding theora videos

[Emmanuel Seyman]

I'm trying to encode videos in Theora and Vorbis formats (to show people
it can be done).

I've ripped a chapter of a DVD to a video dump (1.4 Gb!!!!) and an audio
dump with mplayer and trasferred them to my FC3t3 installation.

I use the following command to encode to Ogg format:

theora_encode -o cowboy.ogg -a 2 -v 5 audiodump.wav stream.yuv

This generates the following output:

File audiodump.wav is 16 bit 2 channel 48000 Hz RIFF WAV audio.
File stream.yuv is 720x480 29.97 fps YUV12 video.
Compressing....
      0:01:34.56 audio: 82kbps video: 2796kbps
done.

and gives me the following file:

[manu at lora ~]$ file cowboy.ogg
cowboy.ogg: Ogg data, Theora video

but trying to play the video gives:
[manu at lora ~]$ theora_player cowboy.ogg
Ogg logical stream 6c2124cc is Theora 720x480 29.97 fps video
Encoded by Xiph.Org libTheora I 20040317 3 2 0
Ogg logical stream 46c3f72b is Vorbis 2 channel 48000 Hz audio.
X Error of failed request:  BadAlloc (insufficient resources for operation)
  Major opcode of failed request:  140 (XVideo)
  Minor opcode of failed request:  19 ()
  Serial number of failed request:  21
  Current serial number in output stream:  22

Google and Bugzilla couldn't help me. What am I doing wrong ?

Emmanuel