What is the best way to create an MP4 (.M4V) that will play with forced subtitles in iTunes, Apple TV, and all iOS devices?
I've begun ripping my blu rays to digital format so I can store them on my NAS and access them from any device. Movies without subtitles work great, I simply use MP4 passthrough and all is well. I'm having issues with videos that have forced subtitles. I'm assuming I need to mux the video, audo and subtitle streams into an .M4V. I'm not sure how to do this. What format must the subtitle be in? SRT, AAS? Will Subler work?
My intention is that have the subtitles show no matter what. I don't want to fiddle with enabling them and disabling them. I want to watch the movie in itunes or an iOS device and have the subtitles show up without doing anything.