Depending on the streaming protocol (eg WARP), you can specify that the tracks (audio vs video) need to be time-aligned, so each group (chunk of video or audio)

Depending on the streaming protocol (eg WARP), you can specify that the tracks (audio vs video) need to be time-aligned, so each group (chunk of video or audio) starts at the same time and lasts the same length. I think this means you'll get resync'd at the start of the next group.