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by dom
Sun Jan 15, 2012 4:35 pm
Forum: General discussion
Topic: Raspberry Pi playing 1080p video and AirPlay
Replies: 13
Views: 5733

Re: Raspberry Pi playing 1080p video and AirPlay

<t>mr_molez said: <br/> <br/> <br/> I would be more interested to see videos showing how fast the pi works with the browser and whether at all they have managed to use flash or gnash. basically i would like to see how fast the pi is at doing everyday things.<br/> <br/> <br/> The videos tend to show ...
by dom
Sat Jan 14, 2012 11:25 pm
Forum: General discussion
Topic: Pal or NTSC?
Replies: 4
Views: 4980

Re: Pal or NTSC?

There"s no way of detecting whether the TV supports PAL or NTSC.
Most TVs will display a picture even if you get it wrong.
You can force PAL or NTSC in a "config.txt" file on boot partition.
by dom
Sun Jan 08, 2012 11:56 pm
Forum: General discussion
Topic: Simultaneous HDMI video and 3.5mm audio output?
Replies: 1
Views: 1092

Re: Simultaneous HDMI video and 3.5mm audio output?

HDMI with analogue audio is fine. That will be a common configuration for DVI monitor users.
by dom
Wed Jan 04, 2012 10:40 pm
Forum: General discussion
Topic: Audio and HDMI?
Replies: 9
Views: 3201

Re: Audio and HDMI?

Audio sync is a feature of the media player.

But, sure, the openMAX API we use allows an offset to be specified between audio and video to compensate for the delay in, for example, the receiver.
by dom
Wed Jan 04, 2012 10:31 pm
Forum: General discussion
Topic: R-Pi as a media player?
Replies: 40
Views: 9996

Re: R-Pi as a media player?

10 bit H.264 is not supported by us, or any hardware decoder (as far as I know).

If you need this ability, you have to go for a software decoder (e.g. a high specced PC).
by dom
Wed Jan 04, 2012 10:07 pm
Forum: General discussion
Topic: Audio and HDMI?
Replies: 9
Views: 3201

Re: Audio and HDMI?

<t>The headphone jack is stereo.<br/> <br/> Mobile phones would use an external audio codec (e.g. Wolfson), which is very high quality.<br/> <br/> Raspberry Pi uses PWM on a GPIO pin with some filtering. It's not so high quality.<br/> <br/> If you are playing through speakers built into the monitor,...
by dom
Wed Jan 04, 2012 8:35 pm
Forum: General discussion
Topic: Audio and HDMI?
Replies: 9
Views: 3201

Re: Audio and HDMI?

There is analogue audio out (headphone socket) that can be fed to an amplifier, but the quality is lower than HDMI audio.

Ideally you would want to use an AV receiver that takes audio from HDMI and feeds it to speakers.
by dom
Tue Jan 03, 2012 9:29 pm
Forum: General discussion
Topic: Can It handle Blu-ray playback ?
Replies: 42
Views: 22478

Re: Can It handle Blu-ray playback ?

<t>The GPU can decode and display main profile level 4.1 H.264 1080p30 content with ease.<br/> <br/> However that's probably not what you are asking.<br/> <br/> Keeping the GPU fed with content at 40Mbit/s is tricky. It's got to come from sdcard, USB, or network.<br/> <br/> Due to licensing issues, ...
by dom
Thu Dec 29, 2011 11:30 am
Forum: General discussion
Topic: will the pi have a proper mac address?
Replies: 2
Views: 2081

Re: will the pi have a proper mac address?

The GPU will have a unique number programmed into OTP bits.

We have a range of MAC addresses assigned. The OTP bits will deterine the specific MAC address you get.

So yes, you will have a globally unique MAC address.
by dom
Tue Dec 27, 2011 3:18 pm
Forum: Other projects
Topic: Down to the metal?
Replies: 10
Views: 2561

Re: Down to the metal?

<t>dburton said: <br/> <br/> <br/> FB access?<br/> <br/> <br/> <br/> The FB access is quite simple. You poke the address of a structure to a mailbox register. The structure defines width/height/bpp etc of framebuffer. The GPU allocates the memory and returns you the address through the mailbox.<br/>...
by dom
Wed Dec 21, 2011 12:26 am
Forum: General discussion
Topic: Which version of HDMI ?
Replies: 12
Views: 1967

Re: Which version of HDMI ?

<t>Quote from tufty on October 2, 2011, 14:19<br/> Quick question for those who might know : With an HDMI connection, is there any way of telling when a screen has been unplugged, turned off, or switched to another source? <br/> <br/> I believe all this, and more is handled through CEC. It can also ...
by dom
Mon Dec 19, 2011 11:04 pm
Forum: Add-ons
Topic: gertboard accessibility
Replies: 16
Views: 5481

Re: gertboard accessibility

<r>[quote]<B><s>[b]</s>Quote from Gert van Loo on December 19, 2011, 12:37<e>[/b]</e></B><br/> Our SW guru has made a <I><s>[i]</s><B><s>[b]</s>temporary <e>[/b]</e></B><e>[/i]</e></I>solution where you can access the GPIO through file access. (open file, write file, read file). It may be a bit slow...
by dom
Sat Dec 17, 2011 12:19 am
Forum: General discussion
Topic: Hardware Watchdog
Replies: 16
Views: 2603

Re: Hardware Watchdog

Actually there is a hardware watchdog and a Linux driver for it. Not tested it yet, but I\'ll enable it in the kernel and check it works.

Edit: Yes it works.
by dom
Tue Nov 22, 2011 11:13 pm
Forum: General discussion
Topic: overclocking
Replies: 92
Views: 14421

Re: overclocking

<t>No, I've never done any permanent damage to a chip through overclocking.<br/> I've never experienced any failure at 800MHz (and I've ran several devices for many days at high and low temperatures).<br/> My board seemed okay at 900MHz with limited testing.<br/> My board crashed during boot up at 9...
by dom
Tue Nov 22, 2011 10:55 pm
Forum: General discussion
Topic: Preinstalled kernel modules
Replies: 16
Views: 2313

Re: Preinstalled kernel modules

<t>Yes, this is up for negiotiation.<br/> <br/> If there are features or drivers you think are important to enable, then please post.<br/> These should be supported in the .config file of 2.6.35 kernel.<br/> <br/> Obviously you can build your own kernel (or ask nicely) if you have unusual requiremen...
by dom
Wed Nov 16, 2011 2:28 pm
Forum: General discussion
Topic: Easy GPIO Hardware & Software
Replies: 133
Views: 45807

Re: Easy GPIO Hardware & Software

<r>GPIO driver will be standard linux. See here:<br/> <URL url="http://www.mjmwired.net/kernel.....n/gpio.txt">http://www.mjmwired.net/kernel.....n/gpio.txt</URL><br/> <br/> You can control it by reading/writing files in /sys/class/gpio/ from linux console and bash scripts.<br/> I'm sure there also ...
by dom
Thu Nov 03, 2011 11:13 am
Forum: General discussion
Topic: Should I be able to boot off a 16GB SDHC?
Replies: 20
Views: 2735

Re: Should I be able to boot off a 16GB SDHC?

<t>I think we can only definitively say a card will work if we have tested it.<br/> The number of sdcards in existance is greater than we can test ouselves.<br/> <br/> A wiki seems like a suitable place where cards that have been tested to work or not work can be documented.<br/> <br/> Personally, I...
by dom
Wed Sep 28, 2011 8:19 pm
Forum: General discussion
Topic: Floating point performance?
Replies: 50
Views: 11809

Re: Floating point performance?

<t>The key option is -mfpu=vfp, but you get that as standard if you use the cross-compiler (bcm2708-gcc).<br/> That improves the results to:<br/> ./whetstone<br/> Loops: 1000, Iterations: 100, Duration: 106 sec.<br/> C Converted Double Precision Whetstones: 94.3 MIPS<br/> <br/> but most of the time ...

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