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Bridgehead upload speed question

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ccyoung
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Joined: 2008-08-13
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Hi,

With PS3 connected via Gigabit Ethernet with my workstation, it took about 6 minutes to upload a 156 MB BD image. For regular BD images over 20 GB, it takes very long hours for the transfer and one would rather burn a BD-RE instead. I wonder if there is anything wrong with my setup or is its speed typical for others who have used it?

I do not know who authored these scripts in the code base but any advice would be very much appreciated.

chris

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chihiro_saito
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Thanks Joe, this is good to know. I guess doing video streaming with disc-unbound xlet is hard in reality, then.

Joe Rice

Well, per spec it's impossible to play video if the disc isn't in the player. The PCE is shut down when the disc is ejected. (Playback Control Engine).

Joe

----- Original Message -----
From: bd-j-dev@mobileandembedded.org
To: bd-j-dev@hdcookbook.dev.java.net
Sent: Thursday, November 5, 2009 5:36:14 PM GMT -08:00 US/Canada Pacific
Subject: Re: [BD-J-DEV] Re: Bridgehead upload speed question

Thanks Joe, this is good to know. I guess doing video streaming with disc-unbound xlet is hard in reality, then.
[Message sent by forum member 'chihiro_saito' (chihiro.saito@sun.com)]

http://forums.java.net/jive/thread.jspa?messageID=370776

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jianjeffzhong
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Joined: 2006-07-26
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Thanks Chihiro. I did some research and it appears most chips for blu-ray players are made by SigmaDesigns and Broadcom. Here is an architecture diagram from sigma - http://www.sigmadesigns.com/Products/SMP8640/pdf_files/bluray8642odm-1_b....
As the chips use Linux, do you know if there is anyway to login to the player to see what's inside? I can ping my player.

jianjeffzhong
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Joined: 2006-07-26
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Hi Chihiro,

I have a LG BD 370 and want load the Bridgehead Xlet into it so that I don't need to use BD-RE to start any Xlet anymore. In another word, after loading, if I remove the BD-RE disc and restart the BD player, will the Bridgehead Xlet still resides in my player? What I want is to add my Xlet and make it just like youtube and Netflix.

Thanks,
Jeff

chihiro_saito
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Hi Jeff,

I believe that BridgeHead is currently a disc-bound xlet, so when the disc is ejected, the xlet should terminate. It shouldn't be that hard to make it to disc unbound - just need to modify it's bdjo, application_binding section.

However, I remember hearing about various restrictions regarding keeping the disc-unbound xlets alive. For example, if you insert a new disc, then that disc also need to signal the xlet to keep it alive. I don't know if it lives through power off/on of the BD player. I haven't played with it much, but perhaps others on the forum might have.

Chihiro

Joe Rice

Hi Jeff & Chihiro -

It won't live through power off/on, and video playback isn't available while the disc is ejected, even if the assets are on the BUDA.

Cheers,
Joe

On 31 Oct 2009, at 6:10 PM, bd-j-dev@mobileandembedded.org wrote:

> Hi Jeff,
>
> I believe that BridgeHead is currently a disc-bound xlet, so when the disc is ejected, the xlet should terminate. It shouldn't be that hard to make it to disc unbound - just need to modify it's bdjo, application_binding section.
>
> However, I remember hearing about various restrictions regarding keeping the disc-unbound xlets alive. For example, if you insert a new disc, then that disc also need to signal the xlet to keep it alive. I don't know if it lives through power off/on of the BD player. I haven't played with it much, but perhaps others on the forum might have.
>
> Chihiro
> [Message sent by forum member 'chihiro_saito' (chihiro.saito@sun.com)]
>
> http://forums.java.net/jive/thread.jspa?messageID=370087
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: bd-j-dev-unsubscribe@hdcookbook.dev.java.net
> For additional commands, e-mail: bd-j-dev-help@hdcookbook.dev.java.net
>

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jianjeffzhong
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Joined: 2006-07-26
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Thanks Joe.

chihiro_saito
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Joined: 2006-11-08
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Hi Chris,

I did those scripts, and I did see that uploading the entire hdcookbook sample disc image takes a while on PS/3 as well. One can make progressive playlist and upload that instead, which apparently works like a streaming video, but that has to be done manually.

I think currently Bridgehead helps more in the everyday application development of a given disc, where the video assets are either dummy or fixed and one needs to check the code change rapidly. If the testing needs to be done with large video asset, it's better to burn those into the BD-RE together with the bridgehead xlet. I'm open to making the tool more suitable for other purposes too, of course.

Chihiro

ccyoung
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Joined: 2008-08-13
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Hi Chihiro,

Thanks for your kind explanation to my question and your cool contributions to the BD-J open source project.

Best,

chris