Will container formats check a/v runtime?

[880]

I have been adding different audio tracks to a video. I created the audio myself, and made sure it was the same length of the video. But it is probably not the exact same runtime as the video; there may be a fraction of a second difference.

I tried muxing it with my MPEG2 video with VOBEdit, and it seemed to work fine. How? Does VOBEdit know to pad or delete some samples from my audio to match the video?

:stupid:

Also, what if I want to put it in a different container like AVI? Would it break?

[foxyshadis]

In general, nothing actually cares whether your streams match or are in any way related. (Some old players have restrictions like they can't have two different audio formats or sample rates in one file, that's the player's problem, and the format's.) Tools are more than happy to mux them, and players happy to play them, up until the end of the last stream, whether or not there's included padding. You'd be surprised how badly stream lengths in the real world actually match up.