I think I found a glitch in oggconvert.
 

OggConvert will not allow me to set what I want to convert my file to, only what structure. I wanted to use theora, but it will not let me choose anymore. So I think something is missing, if anyone knows what is wrong please tell me. Thanks in advanced.

On my computer, in order to choose which video format your converting to, one needs to be converting an M4v, avi, mkv or ogv, however it will not let me choose the video format for mpg or for sound files. So in other words, you may be trying to convert a file format which the OggConverter doesn't support.

I was trying to convert an avi.