HTML 5 <Video> markup not working with iPhone, but works with Safari / iPad

<video controls="controls" width="720" 开发者_运维问答height="406"> <source src="test/kws.mp4" type='video/mp4; codecs="avc1.42E01E, mp4a.40.2"' /> Your browser does not support the video tag. </video>

Any reason this markup doesn't work with iPhone?

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Have you tried removing the codecs part? If no codecs are specified, they will be autodetected.

Also, did you use the baseline format for the encoding? The iPhone does not support any part of h.264 other than baseline.