This one's been quite elusive, and I hope its common enough I just missed something. I've got choppy VOD (not choppy as in poor performance, but choppy like something is wrong) from HLS using iPhone 4, iPad1, and Safari 4 on 10.7. Its like a constant stuttering but only with specifically compressed files. Files also play fine through Quicktime directly and through RTMP/Flash, but through Wowza and HLS stutters.
It sounds related to this:
I also verified this (on v2 and v3 of Wowza)
90 key frames @30fps = 3000ms for the cupertinoChunkDurationTarget.
I've got the issue down to one difference being Main level 3.0 being OK and level 3.1+ has the issue (creating out of Compressor or Squeeze). Even when the above chunking is different I don't have the problem on level 3.0 and down.
I'll stop there hoping there's a quick fix for this. iPhone 4S handles High now, so jumping at that would be cool to play with. What did I miss?