After months of searching for a video converting app that would let me choose audio and subtitle tracks contained in the ubiquitous MKV format (which is very common for anime) and re-export it to an iPhone or PS3-ready video with or without burned in subtitles, I gave up. There simply wasn’t an app that would let me do it without undertaking at least 10 manual steps with dubious command-line software and a lot of script rummaging. Then I found MKVTools . It’s not just super-fast (my previous alternative was Perian+Quicktime, which made gorgeous subtitles, but exporting literally took hours), but it also lets me pick audio/video/subtitle tracks, and 1-click convert it to something my iPhone can play

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MKVTools icon Goodies