[streaming] Re: How to stream high-def video over a LAN?

[Benjamin PRACHT]

On Tue, Mar 01, 2005, Chhaya, Harshal wrote :
> 
> Hi,
> 
> I am trying to stream a high-definition file (MPEG2 transport
> stream @ ~19 Mbps) over a LAN and would like your advice on
> the best way to do this.
> 
> I can stream using vlc (over unicast UDP) and play it on the 
> other PC using vlc but the video is choppy. I suspect that 
> this is because the CPU is fully utilized (100% usage) and
> vlc cannot decode all the frames in time. If I dump the 
> received video stream to file and play it layer, it plays 
> back smoothly which confirms the 'not enough CPU' hypothesis. 
> This is a 2.4 Ghz Pentium 4 and I don't have a faster PC.
> 
> So I assumed that I could buy one of the DxVA (DirectX video
> acceleration) enabled MPEG decoders and offload some of the
> video decoding to the video card (ATI Radeon 9000). I know 
> that VLC cannot use these decoders but Windows Media Player 
> can. However, from what I have read streaming from vlc to WMP 
> means that I have to transcode the file to a lower bitrate 
> which defeats the purpose. 
> 
> Is there a way to stream to WMP without transcoding? I read 
> some mentions of a plug-in that allows WMP to decode MPEG-TS 
> over UDP but I can't find any such plugin. Does such a plugin
> exist?
> 
> Is there any other way I can stream these high-definition
> files? Are there other players that can decode MPEG-TS over
> UDP?
> 

Well, the fact the file can be read from a file leads either to think of
packet loss related to issues in the network, or in the ethernel card /
ethernet card drivers. How is the CPU usage when reading from network,
compared to from file, what are the error messages given by VLC ?

-- 
BigBen

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