problem encoding webm audio content over network stream

Hi

I have built and installed ffmpeg 0.6, Libvorbis Version 1.2.0 and, VP8
(libvpx-0.9.1).

When I runn ffmpeg on the command line everything appears to work fine. I
give it an input webm file downloaded from youtube.com and generate a
different ouput webm file.

However when I try and encode the same webm input file hosted on my local
HTTP server using the ffmpeg API over a HTTP stream I get the following
errors,

ERROR org.ffmpeg - [matroska @ 0x2aab7e723b00] Read error
ERROR org.ffmpeg - [libvorbis @ 0x2aab7ea56aa0] oggvorbis_encode_init:
init_encoder failed

Anyone any ideas about whats causing this issue?

I plan to post same question on Vorbis mailing list?

Thanks

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