Free video converter For Linux and/or Windows

Dear friends,

Whether it is planned to issue the free video converter for Nvidia cards, what is available for ATI (ATI AVIVO)?

For Windows and-or Linux.


Thanks for the link.
Whether there is somewhere a list of programs-converters of video, using Nvidia GPU?
Whether there are such programs for Linux?

Not that I know of. There are a lot of CUDA-using applications and scientific papers on the CUDA zone: