SUGGESTION FOR A Linux based Card

SUGGESTION FOR A Linux based Card

[Akhilesh Soni]

Hello,

I am looking for a linux based card for 4 composite input with unbalanced
audio for full D1 resolution. The idea is to capture live stream and encode
using vlc-ffmpeg for http streaming. It is better to have availability of
these cards in India.

Thanks,
Akhilesh
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RE: SUGGESTION FOR A Linux based Card

[Charlie X. Liu]

Sensoray Company has Model 811 (a 4-channel PCI-Express Capture Card:
http://www.sensoray.com/products/811.htm ) and Model 911 (a 4-channel
PCI/104-Express Capture Card: http://www.sensoray.com/products/911.htm ).
Both have 4 Composite/S-Video inputs, plus 4 channel of stereo audio inputs.
They all work well under Linux.

Charlie X. Liu @ Sensoray Co.


-----Original Message-----
From: video4linux-list-bounces@redhat.com
[mailto:video4linux-list-bounces@redhat.com] On Behalf Of Akhilesh Soni
Sent: Thursday, July 08, 2010 6:14 AM
To: video4linux-list@redhat.com
Subject: SUGGESTION FOR A Linux based Card

Hello,

I am looking for a linux based card for 4 composite input with unbalanced
audio for full D1 resolution. The idea is to capture live stream and encode
using vlc-ffmpeg for http streaming. It is better to have availability of
these cards in India.

Thanks,
Akhilesh
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RE: SUGGESTION FOR A Linux based Card

[Roger Oberholtzer]

On Thu, 2010-07-08 at 12:37 -0700, Charlie X. Liu wrote: 
> Sensoray Company has Model 811 (a 4-channel PCI-Express Capture Card:
> http://www.sensoray.com/products/811.htm ) and Model 911 (a 4-channel
> PCI/104-Express Capture Card: http://www.sensoray.com/products/911.htm ).
> Both have 4 Composite/S-Video inputs, plus 4 channel of stereo audio inputs.
> They all work well under Linux.

We have used 4-channel cards from Linux Media Labs (LML). They have
worked out of the box. Never a problem.


-- 
Roger Oberholtzer

OPQ Systems / Ramböll RST

Ramböll Sverige AB
Krukmakargatan 21
P.O. Box 17009
SE-104 62 Stockholm, Sweden

Office: Int +46 10-615 60 20
Mobile: Int +46 70-815 1696

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RE: SUGGESTION FOR A Linux based Card

[Charlie X. Liu]

Is it a BT878-based or SAA7134-based? If you are looking for a better quality capture card, considering a SAA7134-based is very important, since BT878 is too old and SAA713x is a newer generation one that uses more advanced technologies including using the adaptive comb filter and adaptive anti-alias filtering techniques which make big difference on image/video quality.

We had side-by-side comparison and decided using SAA7135HL (full version of SAA7134) for the Sensoray Model 811 ( http://www.sensoray.com/products/811.htm, 4-channel PCIe) and Model 911 (http://www.sensoray.com/products/911.htm
, 4-channel PCIe/104).

Best regards,

Charlie X. Liu @ Sensoray Co.


-----Original Message-----
From: video4linux-list-bounces@redhat.com [mailto:video4linux-list-bounces@redhat.com] On Behalf Of Roger Oberholtzer
Sent: Thursday, July 08, 2010 11:26 PM
To: video4linux-list@redhat.com
Subject: RE: SUGGESTION FOR A Linux based Card

On Thu, 2010-07-08 at 12:37 -0700, Charlie X. Liu wrote: 
> Sensoray Company has Model 811 (a 4-channel PCI-Express Capture Card:
> http://www.sensoray.com/products/811.htm ) and Model 911 (a 4-channel
> PCI/104-Express Capture Card: http://www.sensoray.com/products/911.htm ).
> Both have 4 Composite/S-Video inputs, plus 4 channel of stereo audio inputs.
> They all work well under Linux.

We have used 4-channel cards from Linux Media Labs (LML). They have
worked out of the box. Never a problem.


-- 
Roger Oberholtzer

OPQ Systems / Ramböll RST

Ramböll Sverige AB
Krukmakargatan 21
P.O. Box 17009
SE-104 62 Stockholm, Sweden

Office: Int +46 10-615 60 20
Mobile: Int +46 70-815 1696

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RE: SUGGESTION FOR A Linux based Card

[Roger Oberholtzer]

On Fri, 2010-07-09 at 09:30 -0700, Charlie X. Liu wrote: 
> Is it a BT878-based or SAA7134-based? If you are looking for a better quality capture card, considering a SAA7134-based is very important, since BT878 is too old and SAA713x is a newer generation one that uses more advanced technologies including using the adaptive comb filter and adaptive anti-alias filtering techniques which make big difference on image/video quality.

They have a few different cards. BT878 is not lower quality (in my
opinion when using these cards in systems to capture images for
high-speed image processing). The difference is that it does no
compression in hardware. But I thought the original poster mentioned
using ffmpeg.

We also use a 4-channel card that compresses to jpeg-2000 in hardware.
Great linux support.

It is a mistake to confuse age with quality. In this area, new sometimes
means cheaper to make, or additional features (like compression) that do
not effect the basic image capture quality.

YMMV. 


-- 
Roger Oberholtzer

Ramböll RST/OPQ

Ramböll Sverige AB
Krukmakargatan 21
P.O. Box 17009
SE-104 62 Stockholm, Sweden

Office: Int +46 10-615 60 20
Mobile: Int +46 70-815 1696

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RE: SUGGESTION FOR A Linux based Card

[Charlie X. Liu]

I could not all agree with your opinion, Roger. if you do a side-by-side image/video quality comparison, especially using a resolution chart as object in front of your video camera, you will see the big difference. Pay attention to aliasing artifacts.

Best regards,

Charlie X. Liu, Ph.D.

Dept. of Engineering
Sensoray Company
7313 SW Tech Center Dr.
Tigard, OR 97223, USA
Phone:  (503) 684-8073
Fax:    (503) 684-8164
Web:    http://www.sensoray.com


-----Original Message-----
From: Roger Oberholtzer [mailto:roger@opq.se] 
Sent: Friday, July 09, 2010 2:55 PM
To: Charlie X. Liu
Cc: video4linux-list@redhat.com
Subject: RE: SUGGESTION FOR A Linux based Card

On Fri, 2010-07-09 at 09:30 -0700, Charlie X. Liu wrote: 
> Is it a BT878-based or SAA7134-based? If you are looking for a better quality capture card, considering a SAA7134-based is very important, since BT878 is too old and SAA713x is a newer generation one that uses more advanced technologies including using the adaptive comb filter and adaptive anti-alias filtering techniques which make big difference on image/video quality.

They have a few different cards. BT878 is not lower quality (in my
opinion when using these cards in systems to capture images for
high-speed image processing). The difference is that it does no
compression in hardware. But I thought the original poster mentioned
using ffmpeg.

We also use a 4-channel card that compresses to jpeg-2000 in hardware.
Great linux support.

It is a mistake to confuse age with quality. In this area, new sometimes
means cheaper to make, or additional features (like compression) that do
not effect the basic image capture quality.

YMMV. 


-- 
Roger Oberholtzer

Ramböll RST/OPQ

Ramböll Sverige AB
Krukmakargatan 21
P.O. Box 17009
SE-104 62 Stockholm, Sweden

Office: Int +46 10-615 60 20
Mobile: Int +46 70-815 1696



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Re: SUGGESTION FOR A Linux based Card

[Daniel Glöckner]

On Fri, Jul 09, 2010 at 11:54:48PM +0200, Roger Oberholtzer wrote:
> BT878 is not lower quality (in my
> opinion when using these cards in systems to capture images for
> high-speed image processing).

The BT878 has an 8 bit ADC with gain controlled so that the back porch
samples as 0x38. The successor CX23880 already uses a 10 bit ADC.

  Daniel

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