How Many Streams Can DM8168 Capture?

John Stuart

I realize that this may be a simple question but I've been unable to find the answer.

We're considering the DM8168 for a video capture device. We'd like to be able to capture 3 1080p30 streams and encode to H.264. The literature claims that this processor supports:

-Up to 3 HD video accelerators each capable of up to 1080p60 display

But in looking at the TRM, the HDVPSS has only 2 capture devices.

Is it possible to capture multiple streams with one capture device of the DM8168, and if so, how? We're also looking at having to capture other formats like VGA, Composite, etc. How does that change the capture? If It's not possible, is there a TI device that could be used to capture and feed the 3rd HDVICP, say thru PCIe?

All links would be appreciated.

Thanks, John

over 13 years ago

0 HardikShah over 13 years ago

TI__Mastermind 20245 points

Hi,

Answers inline,

John Stuart said:
We'd like to be able to capture 3 1080p30 streams and encode to H.264

Capture device supports 16-bit capture on one port and 24-bit capture on other port. Both of these ports can be used as 2 independent 8-bit ports so you can have 4 8-bit capture. All ports can take upto 165MHz clock. So for 1080P30 you can convert from 16-bit to 8-bit using FPGA and can have 4 1080P30 capture. But with 16-bit only 2 capture is possible.

John Stuart said:
Is it possible to capture multiple streams with one capture device of the DM8168, and if so, how?

As mentioned above you will be able to capture 4 1080P30

John Stuart said:
We're also looking at having to capture other formats like VGA, Composite, etc. How does that change the capture?

Capture port can support any arbitrary resolution upto 165MHz provided input adheres to BT656, BT1120 standards.

Regards,

Hardik Shah

0 John Stuart over 13 years ago in reply to HardikShah

Prodigy 140 points

Thanks for the reply. It is exactly what I needed to know.

Is anyone aware of an OTS device that can perform the step-down in width, 16-to-8 bits? We are trying to avoid using an FPGA. If we use an FPGA, we'd probably just skip the SoC altogether.

0 HardikShah over 13 years ago in reply to John Stuart

TI__Mastermind 20245 points

Hi,

Let me find out the device from our portfolio and get back to you.

Regards,

Hardik Shah

0 HardikShah over 13 years ago in reply to HardikShah

TI__Mastermind 20245 points

Hi,

Current solution is to use FPGA only. We dont have that chip as on now.

Regards,

Hardik Shah

0 John Stuart over 13 years ago in reply to HardikShah

Prodigy 140 points

Thank you for the effort Hardik. Maybe we'll just add a second DM816x.

0 SuitJune Young over 13 years ago in reply to John Stuart

Genius 3985 points

Hello John.We have a similar case.

And I have a solution without FPGA.

I think we could have a communication.

My mail: youngsuitjune@gmail.com

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How Many Streams Can DM8168 Capture?