I have downloaded a Seinfeld series and it is in the rmvb format. When I copy to my external and try to play on the WD TV it does not recognise it. I think I need to convert it to another format?
If the answer given by @Mitch doesn't work, you can try
You can find the bitrate of the original file in the output of mplayer (command line) when it runs the file.
Only the WD Mini support RMVB. You need to convert RMVB files to AVI, MPEG2, to be playable using WD TV.
You can use Mplayer to do the conversion, Just press Ctrl+Alt+T on your keyboard to open Terminal. When it opens, run the command below.
Once installed, switch to the directory where your .rmvb file is, and do