Re: mpeg2 transport stream adquisition
From: FLY135 (fly_135_at_hotmail.com)
Date: 11/21/05
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Date: 21 Nov 2005 07:03:02 -0800
basuratomica wrote:
> Hi,
> i am working with a ep9302 micro (cirrus edb9302 board, where i
> mounted a Linux embedded 2.6 kernel.) and it is very important for me
> to know if this board can menage data transfer of 4 Mbit/s.
> My target is to adquire from a tipical digital video source (for
> example satellite) a mpeg2 signal (transport stream format) and then
> do the incapsulation of this stream in a LAN.
> Every test i did showed me that it can easily menage a 1 Mbit/s
> bitrate (tipically from a file source) but when i try to adquire the
> signal from satellite (4 ore 5 Mbit/s) the system crashes. It seems
> that the board cannot read and demux such a quantity of data even if
> i am using the DMA (so that the stream is directly available in the
> SDRAM nearly without cpu menagement).
>
> Anyone did some test on it?
>
> Any help you can give me would be greatly appreciated.
Crashing is an indication of programming error. I can move 6Mbps of
MPEG-2 transport stream from the encoder chip to the network (UDP
multicast) with a 73Mhz ARM. However, I'm not using Linux. But I
don't see why a 200Mhz processor can't handle that.
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