The VideoLAN Forums

Upload the Video into QuickTime 7. Under the "Window" Menu, select "Show Movie Info"....

VLC 0.8.5 is the only transcoding Theora Video and Vorbis Audio converter I have found for the Mac. Thank You.

The aspect ratio changes....

Any helpful hints on how to conserve the frame size and dimensions?

Thanks for VLC 0.8.5 on Mac G4 Mac OS 10.4.8:

I converted a .mov file to .ogg using VLC...aspect ratio changed. Please help because this is the only workable converter I found for the Mac.