DV + Headset = AV Drift ?

[tom.barrett]

Using a Panasonic professional cam and a Logitech headset. After about an hour of recording, the audio is ahead of the video by a good three seconds. That can really take the suspense out of a basketball game... Is this due to the time it takes to process the video stream as opposed to the time it takes to process the audio? Would it be better to use the DV audio source as well? Or, should a DV video source and a Logitech headset work fine?

Thanks

[admin]

The hardware is OK.
It is likely an issue in our mp4 recording module; we can reproduce the problem and will try to fix it in the next release.

[tom.barrett]

Thanks for the info. Any chance that moving the "MOOV Atom" to the start of the file could be done in the next release too? Just bought the license for the server and now that we've started using it in production we find out that the files have weird MOOV locations and they don't start playing out until the file has completely downloaded... that's a serious problem when each file can be as large as 500MB. Any ballpark on a release date?

[admin]

they don't start playing out until the file has completely downloaded

Using what player/server?

[tom.barrett]

I've been using JWPLAYER doing regular old HTTP progressive download. I want to use a Flash player for archived content so clients don't have to load any third party codecs on their machines. As far as I can tell (based on the examples in the SDK and numerous iterations I've tried) Umedia Flash player won't play archived .mp4 files. Though, when I use the ums streaming media player and the media server it works fine (UMS-TCP).

So I believe the issue is:
1. You can't RTMP (Flash) for archived content with UMedia Server
2. UMedia FLASH doesn't support .mp4 playback via UMedia server
3. Progressive download fails to parse the "moov atom" correctly for immediate streaming in the files generated by UArchive Server.

*Please tell me I'm doing something wrong and the Media server will RTMP the mp4 files to flash player

[admin]

Nope, you are doing everything right and your observations are correct.
Thanks for the input on MOOV issue that causes progressive download problem with flash players. We will try to fix it.

The good news are - our next version will support RTMP (and RTMPT) of mp4 files to Flash player - works fine now in our lab.

V9.0 release is April-May 2012.