I have some video files of television programs in several formats: .xvid .avi and .mkv
The first two readily load into Toast Titanium in order to burn to a dvd for replay on a stand alone dvd player (it's about 10 years old, but this works well with our ancient tv).
Lately I've obtained some .mkv files that seem to have problems. They launch quicktime the screen goes black and either nothing happens (I get a blank, black screen with video controls imposed on it but no sound or audio) or I get the same blank black screen with only one: video or audio. While the occasional .mkv file loads and burns fine, lately, most of them have the problem just described. The .mkv files have better resolution, although they are often very large.
Does anyone have an opinion about what to do about this (short of buying some new hardware that I can't afford at present)? Thanks in advance.
p.s. I'm on a mac running Mountain Lion, using Toast 10.