I simply want to convert files, any format to any format (at the moment, I need to convert MKV to MP4-h264), without losing quality. I don't want to resize (scale) the video, I don't want to change its aspect ratio and I don't want it to lose quality (this is very important); all I want is "to change the format", that's all. Reason: my DVD player won't recognize any formats other than AVI or MP4. I don't care about file size, unless the difference between the input and the output files is absurdly huge. So, how do I do that?
I've already tried programs such as WinFF, Arista, Format Junkie, but their presets always change something which I don't want to be changed (size, aspec ratio, etc.). I'm not really sure, but I think the best way to get what I want is to go with the pure ffmpeg commands. But how?
By the way, Ubuntu 13.04 (64-bit), here. Thanks for your time, guys.