VOD Cupertino Streaming - Seek problem

[igra__]

I have problem with mp4 files that encoded with on2 encoder .
Video plays correctly (Cupertino HTTP stream) , but there is a problem with seek - after seeking - audio continues to work properly but video frozen .

I checked same files in the same vod application instance with Flash and Silverlight - seek works fine !

Can anyone explain what the problem ?

example file : download file

[rrlanham]

It played on my IPhone 3GS v 3.13, using Wowza 2.0.0.12

Richard

[igra__]

Wowza 2.0.0.12 ?!

in http://wowzamedia.com/devbuild.html i see only patch11 (that we use) -Version: 2.0.0.11 build23886

Note that the file is playing well , the problem only after seek ! You tested this file with seek ?!

[rrlanham]

Sorry, you're right. Seek is a problem for me with this video on IPhone too. I don't know why.

Richard

[igra__]

May be it wowza bug ? Charlie can you check it ?

[charlie]

It seems to be a problem with the encode. Not sure what it is. If I use the Apple segmenter I see the same problem. Seems like there might a problem with how On2 is marking key frames but hard to tell.

Charlie

[Punkley]

anyone found a solution to this issue, im facing it now.

[igra__]

from devforums.apple.com :

IDR frames are basically the H.264 equivalent of I frames. They are synchronization points in the video; you can seek to that point and play the video.

What that encoder is most likely doing is not putting any IDR frames in other than at the very beginning; we require that IDR frames occur in each segment, so you can seek to them. That's typical of video conferencing, or I've seen it in AVCHD.

You can find settings on that engine to force IDR frames, or you can encode using Quicktime or some other encoder.

and here answer that I received from Google On2 Support

Flix Engine's H264 encoder sets the IDR interval such that no IDR frames are produced. This is not available to change in the Flix Engine API, so I'm afraid that Flix Engine can't produce the kind of video you need.