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

[Joel Jaeggli]

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
> 
> 
> 

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Joel Jaeggli	      Academic User Services   joelja at darkwing.uoregon.edu    
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