MP4 pseudostreaming - seek delay

Igor Sysoev igor at
Wed Apr 18 06:38:12 UTC 2012

On Tue, Apr 17, 2012 at 09:23:13PM -0400, ragivan wrote:
> That was back in 2008, they didn't have 2 hour long videos. But what I
> was talking about what regarding the technology, lighttpd and nginx both
> do pseudo streaming. The moov atom is about 5 MB so it takes about 10
> seconds to download that before playing the video. Is there some
> technique to start playing the video after partial download of the moov
> atom? Or is it possible to cache the moov atom into memory for faster
> retrieval?

I've just tried to watch 3 YouTube movies in Firefox 11 with Flash installed
and discovered using LiveHTTPHeaders that these movies are in FLV format.
Using this format player is smart enough to request just a file offset
but not movie time and it does not need movie metadata such as MOOV atom.
It need just a small static 13-bytes FLV header:

Igor Sysoev

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