[vlc] Re: MPEG streaming OK with opie-vlc and WLAN but not Bluetooth

[Andrew leung]

Dear joelja,


Thank you for your opinion, I agree. this is a good example to show Bluetooth is targetting at different market. What I have tried is in fact my school's project. Thank you very much for your opinion.


Andrew 


----- Original Message -----
From: Joel Jaeggli <joelja at darkwing.uoregon.edu>
Date: Sat, 29 Mar 2003 05:18:23 -0800 (PST)
To: vlc at videolan.org
Subject: [vlc] Re: MPEG streaming OK with opie-vlc and WLAN but not Bluetooth

> I would conclude that bluetooth isn't really a serious transport for 
> multimedia. As a low speed perhipheral interconnect it's acceptable, ie my 
> headset talks to my phone ok and my phone talks to my laptop, but it's 
> just painfully slow for lots of other things it could be useful for, like 
> tranfering data off digital cameras or laptop to laptop file transfers.
> 
> I suspect that the biggest issues were simply that time to market was too 
> long and that ericsson was aiming for something to replace serial ports 
> and ir ports. not to build a high-performance network transport.
> 
> joelja
> 
>  On Sat, 29 Mar 2003, Andrew 
> leung wrote:
> 
> > Dear Jean - Paul (and ALL),
> > 
> > Hello, Jean - Paul. After working for a few months and with your value advices so far, now  Iam quite sure to say it is really not ok to receive MPEG - 1 or other high - BW - required video streaming with bluetooth.
> > 
> > 
> > My testing result is, using WLAN 802.11b, D - Link WLAN card on both iPAQ(client) amd server(a simple linux PC), a MPEG - 1 video and audio UDP streaming has no problem , provided that the client is running opie-vlc and the server is running vlc.
> > 
> > 
> > keep whole set up unchange except replacing WLAN with a bluetooth PCMCIA card (Sunderland), NO movies anymore, opie-vlc gives many dropping buffer error and PTS out of range warnings
> > 
> > 
> > I think these results let us to conclude, quite sure, the bandwidth is the main factor.
> > 
> > 
> > I also have to raise that this bluetooth card is implemented with UART limition to gives max bitrate ~ 120kbps, not theoretical 700 kbps, this is the info from bluez mailing lists.
> > 
> > finally I have to add tha tthe movie I used for the test is a 352 X 240 MPEG-1 file.
> > 
> > 
> > 
> > 
> > 
> > Jean - Paul, would you mind kindly tell me again your testing's video 's info provided that THAT VIDEO is OK in opie-vlc? say, the resolution and encoding? :) 
> > 
> > 
> > Thank you very much,
> > Andrew
> > 
> > 
> > 
> 
> -- 
> -------------------------------------------------------------------------- 
> Joel Jaeggli	      Academic User Services   joelja at darkwing.uoregon.edu    
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