[Ffmpeg-devel] Broken seeking in ASF

[V]

Hi!

I found a bug when using "-t" parameter for ASF containers.
File length is 120 seconds. I try to cut part of the file with 10 seconds duration, but receive all file from 00:00:05 till the end.
It's only happens with ASF container. 

What's wrong?
Is this bug present at other versions?
Who can fix it?

ffmpeg -i input.wmv -vcodec copy -acodec copy  output.wmv -ss 00:00:05 -t 10