any recommendations for SD/SDI cards under linux?

any recommendations for SD/SDI cards under linux?

[Limin Wang]

Hi,

I am a newbie to the list and can't find how to search on the archive, so
had to ask the question here.
If you have any recommendations for SDI cards under linux, would you mind
telling me? 


Thanks,
Limin

--
video4linux-list mailing list
Unsubscribe mailto:video4linux-list-request@redhat.com?subject=unsubscribe
https://www.redhat.com/mailman/listinfo/video4linux-list

Re: any recommendations for SD/SDI cards under linux?

[Andrea Venturi]

Limin Wang wrote:
> Hi,
> 
> I am a newbie to the list and can't find how to search on the archive, so
> had to ask the question here.
> If you have any recommendations for SDI cards under linux, would you mind
> telling me? 

hi,

we are using Dektec card as ASI ports (for DVB transport stream), under
linux, and they do have quite a good linux driver, fully open source and
more than GPL (public domain?) albeit not linux-dvb compliant, but it's
just a character device.

the SDI link is the same physical stuff of ASI so for example this card
shoud work for your task too:

  http://www.dektec.com/Products/DTA-145/index.asp

YMMV, i don't have a direct experience about SDI usage, but i had a good
experience with Dektec stuff so i suggest them quite wholeheartedly
(btw, don't have any economic interest.. :-)

bye

andrea venturi

--
video4linux-list mailing list
Unsubscribe mailto:video4linux-list-request@redhat.com?subject=unsubscribe
https://www.redhat.com/mailman/listinfo/video4linux-list

Re: any recommendations for SD/SDI cards under linux?

[Limin Wang]

Hi,


* Andrea Venturi <a.venturi@cineca.it> [2008-03-12 10:19:08 +0100]:

> Limin Wang wrote:
> > Hi,
> > 
> > I am a newbie to the list and can't find how to search on the archive, so
> > had to ask the question here.
> > If you have any recommendations for SDI cards under linux, would you mind
> > telling me? 
> 
> hi,
> 
> we are using Dektec card as ASI ports (for DVB transport stream), under
> linux, and they do have quite a good linux driver, fully open source and
> more than GPL (public domain?) albeit not linux-dvb compliant, but it's
> just a character device.
> 
> the SDI link is the same physical stuff of ASI so for example this card
> shoud work for your task too:
> 
>   http://www.dektec.com/Products/DTA-145/index.asp
> 
> YMMV, i don't have a direct experience about SDI usage, but i had a good
> experience with Dektec stuff so i suggest them quite wholeheartedly
> (btw, don't have any economic interest.. :-)

Thanks for your comments, I have look at their SDK. It seems that they save
the orignal SDI data into file and haven't any interface to demux the video and
audio of the raw SDI stream. I need to transcode the SDI to other compress
format h264/aac etc to save disk space.


Thanks,
Limin

--
video4linux-list mailing list
Unsubscribe mailto:video4linux-list-request@redhat.com?subject=unsubscribe
https://www.redhat.com/mailman/listinfo/video4linux-list

Re: any recommendations for SD/SDI cards under linux?

[Daniel Glöckner]

On 12 Mar 08 18:16, Limin Wang wrote:
> Thanks for your comments, I have look at their SDK. It seems that they save
> the orignal SDI data into file and haven't any interface to demux the video 
> and audio of the raw SDI stream. I need to transcode the SDI to other compress
> format h264/aac etc to save disk space.

You shouldn't make your decision to buy a card depend on the SDK.
When I look at the "SDK", I see a complete open source public domain driver
that gives access to all aspects of the SDI stream.

As SDI is uncompressed, it should be a matter of hours to write a
demultiplexer and feed the streams to x264 and faac or any other compresser.

I found the Ingex software suite that deals with SDI data on Sourceforge.
Maybe it includes a demultiplexer you can use.

Btw., the PCIe version is 5% cheaper.

  Daniel

--
video4linux-list mailing list
Unsubscribe mailto:video4linux-list-request@redhat.com?subject=unsubscribe
https://www.redhat.com/mailman/listinfo/video4linux-list

Re: any recommendations for SD/SDI cards under linux?

[Limin Wang]

Hi,

* Daniel Glöckner <daniel-gl@gmx.net> [2008-03-12 12:38:07 +0100]:

> On 12 Mar 08 18:16, Limin Wang wrote:
> > Thanks for your comments, I have look at their SDK. It seems that they save
> > the orignal SDI data into file and haven't any interface to demux the video 
> > and audio of the raw SDI stream. I need to transcode the SDI to other compress
> > format h264/aac etc to save disk space.
> 
> You shouldn't make your decision to buy a card depend on the SDK.
> When I look at the "SDK", I see a complete open source public domain driver
> that gives access to all aspects of the SDI stream.
> 
> As SDI is uncompressed, it should be a matter of hours to write a
> demultiplexer and feed the streams to x264 and faac or any other compresser.
> 
> I found the Ingex software suite that deals with SDI data on Sourceforge.
> Maybe it includes a demultiplexer you can use.
> 
> Btw., the PCIe version is 5% cheaper.

thanks to all for your information. I haven't look at SDI format in detail. To
my knowledge, it can embedded audio with uncompress or compress format, so any
idea about it? Any question for audio/video sync? If I had to write SDI
de-muxer, what's the specs to process all SDI format so that I can demux it by
the definition of standard.


Thanks,
Limin

--
video4linux-list mailing list
Unsubscribe mailto:video4linux-list-request@redhat.com?subject=unsubscribe
https://www.redhat.com/mailman/listinfo/video4linux-list

Re: any recommendations for SD/SDI cards under linux?

[Daniel Glöckner]

On Wed, Mar 12, 2008 at 09:42:47PM +0800, Limin Wang wrote:
> thanks to all for your information. I haven't look at SDI format in detail. To
> my knowledge, it can embedded audio with uncompress or compress format, so any
> idea about it? Any question for audio/video sync? If I had to write SDI
> de-muxer, what's the specs to process all SDI format so that I can demux it by
> the definition of standard.

http://en.wikipedia.org/wiki/Serial_Digital_Interface
looks like a good starting point

  Daniel

--
video4linux-list mailing list
Unsubscribe mailto:video4linux-list-request@redhat.com?subject=unsubscribe
https://www.redhat.com/mailman/listinfo/video4linux-list

Re: any recommendations for SD/SDI cards under linux?

[Limin Wang]

Hi,

* Daniel Gl?ckner <daniel-gl@gmx.net> [2008-03-12 22:21:58 +0100]:

> On Wed, Mar 12, 2008 at 09:42:47PM +0800, Limin Wang wrote:
> > thanks to all for your information. I haven't look at SDI format in detail. To
> > my knowledge, it can embedded audio with uncompress or compress format, so any
> > idea about it? Any question for audio/video sync? If I had to write SDI
> > de-muxer, what's the specs to process all SDI format so that I can demux it by
> > the definition of standard.
> 
> http://en.wikipedia.org/wiki/Serial_Digital_Interface
> looks like a good starting point

I have no clue about the SDI file format by the wiki, even I have reviewed
SMPTE 259M document, it's described from hardware level. So any expert know
which document describe the detailed format?

By the way, I google this thread for about osprey560 which support v4l:
http://lists-archives.org/video4linux/12385-.html

What's the conclusion about the card? can the latest kernel support the SDI input?


Thanks,
Limin

--
video4linux-list mailing list
Unsubscribe mailto:video4linux-list-request@redhat.com?subject=unsubscribe
https://www.redhat.com/mailman/listinfo/video4linux-list

Re: any recommendations for SD/SDI cards under linux?

[Daniel Glöckner]

On Thu, Mar 13, 2008 at 11:02:09AM +0800, Limin Wang wrote:
> I have no clue about the SDI file format by the wiki, even I have reviewed
> SMPTE 259M document, it's described from hardware level. So any expert know
> which document describe the detailed format?

I think for SD-SDI it's like this:
143 Mb/s = Composite NTSC sampled at 14,3 MHz, SMPTE 244M
177 Mb/s = Composite PAL sampled at 17,7 MHz, IEC 61179-5
270 Mb/s = 4:2:2 Video sampled at 13,5 MHz, SMPTE 125M
360 Mb/s = 4:2:2 Video sampled at 18 MHz, SMPTE 267M

The first two require signal processing to separate luma and chroma.
The last one exceeds the bitrate of the DekTec card.
I doubt the last two standards will tell you a lot more than
"each line consists of {space for ANC} {SAV} {Cb Y Cr Y}+ {EAV}".

SMPTE 291M = How to add ancillary data
SMPTE 272M = How to pack uncompressed audio into ancillary frames
SMPTE 337M = How to pack compressed instead of uncompressed audio

  Daniel

--
video4linux-list mailing list
Unsubscribe mailto:video4linux-list-request@redhat.com?subject=unsubscribe
https://www.redhat.com/mailman/listinfo/video4linux-list