I know the DSS has a 10 second buffer.
- Brian
Heiko Recktenwald wrote:
> Peter,
>
>>Date: Fri, 25 Nov 2005 00:45:56 +0100
>>From: Peter Maersk-Moller <email@hidden>
>>Subject: Sync issues for continous connections
>>To: email@hidden
>>Message-ID: <email@hidden>
>>Content-Type: text/plain; charset=us-ascii; format=flowed
>>
>>Hi
>>
>>I have an annoying sync issue when udp-relaying through DSS.
>>
>>I have a system that can be broken down to the following
>>componets
>>
>> mp4live-------->DSS1------>DSS2
>>
>>DSS1 and DSS2 are DSS-5.0.1.
>>
>>mp4live encodes continously MPEG-4 streams and sends it
>>as unicast UDP to DSS1.
>>
>>On DSS1 I have set up a continous running
>>relay of the stream from mp4live to DSS2.
>>
>>mp4live occasionally core dumps and restarts within
>>1-4 seconds.
>>
>>Over time, between 1-20 hours depending on the stream,
>>audio/video gets out of sync when playing the stream
>>from either DSS1 or DSS2 with both Quicktime and VLC.
>>
>>Restarting the mp4live wont correct this. To get audio and
>>video in sync again, I have to either
>>
>> a) restart DSS1 or
>>
>> b) shut down the continously UDP relaying from DSS1 to DSS2
>>
>>Sometimes, if anybody is connected to the stream on DSS1, I have to
>>cut their connection as well to get DSS1 (and subsequently DSS2)
>>to stream with audio and video in sync again. It doesn't help
>>to shutdown the stream from mp4live for 60 seconds before restarting
>>the encoder (mp4live).
>>
>>Why is this time drift occuring and can I somehow reset it
>>without having to restart the DSS1 and DSS2 ? Is it a RTCP
>>issue ?
>>
>>
>>
> Dont have experiences with such a relay and such long time, but two
> questions:
>
> Have you tried to reduce the DSS buffer size? Ask google. I think there
> is no buffer in mp4live,
> allthough there is some in mp4player etc, mplayer is faster.
>
> Have you tried it with QT Broadcaster?
>
> Can somebody confirm it?
>
>
> H.
>
>
>
> mpegurl.blog.de
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