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by st599
Fri Dec 27, 2019 9:45 am
Forum: Troubleshooting
Topic: Gawk Error on Lite
Replies: 4
Views: 248

Re: Gawk Error on Lite

Hi No Windows machines involved, it was SCP'd from a Linux Laptop (where it works). I can post the full code, but it's 5348 lines of BASH script which autogenerates the AWK on the fly, so I'd rather not. The troublesome function looks like: # Evaluate in AWK. Intended for arithmetic operations. #+Ke...
by st599
Thu Dec 26, 2019 2:34 pm
Forum: Troubleshooting
Topic: Gawk Error on Lite
Replies: 4
Views: 248

Gawk Error on Lite

Hi, I've been playing with the Video Contact Sheet script from https://outlyer.net/2019-11-26:vcs-1-13-4-released/ It runs well, if slowly, on a Raspberry Pi 0 with the full version of Raspbian Buster. However, to cut down on boot times, I've moved to Raspbian Lite. The script no longer runs, throwi...
by st599
Tue May 08, 2012 1:17 pm
Forum: Other projects
Topic: radio conversion
Replies: 9
Views: 4145

Re: radio conversion

<t>apk5hw said: <br/> <br/> <br/> Like I say, it'll need to read two potentiometers, a couple of buttons (i'd like to use the MW and LW buttons to switch between local tunes and internet radio stations) as well as reading the old radio signal (mixing it in software is easier for me as I'm no pro wit...
by st599
Thu Mar 08, 2012 11:01 am
Forum: Other projects
Topic: FishPi - automated surface vessel.
Replies: 39
Views: 11627

Re: FishPi - automated surface vessel.

by st599
Wed Mar 07, 2012 2:05 pm
Forum: Staffroom, classroom and projects
Topic: Best first language
Replies: 160
Views: 48848

Re: Best first language

What's wrong with OCCAM or ADA95?
by st599
Wed Mar 07, 2012 12:10 pm
Forum: Other projects
Topic: FishPi - automated surface vessel.
Replies: 39
Views: 11627

Re: FishPi - automated surface vessel.

http://www.gcmap.com/mapui?P=JFK-LHR

You'll see that the shortest route is not a straight line and requires a course change every X days/hours.
by st599
Wed Mar 07, 2012 11:04 am
Forum: Other projects
Topic: FishPi - automated surface vessel.
Replies: 39
Views: 11627

Re: FishPi - automated surface vessel.

<t>What sort of distances are you thinking about?  Across the bay, the navigation is relatively easy.  Across the Atlantic, you'll probably need o work out Great Circles and such.<br/> <br/> Either way, you'll need a PID controller to maintain COG and SOG.  Will you need knowledge of currents/tides ...
by st599
Tue Mar 06, 2012 8:32 am
Forum: Other projects
Topic: The AutoPlane Project
Replies: 40
Views: 35127

Re: The AutoPlane Project

You could use a Kalman filter and PID controller in the main code.

Why have lots of individual programs?

How is system redundancy achieved?
by st599
Mon Mar 05, 2012 12:30 pm
Forum: Other projects
Topic: FishPi - automated surface vessel.
Replies: 39
Views: 11627

Re: FishPi - automated surface vessel.

<t>viciouspenguin said: <br/> <br/> <br/> I"ve hit upon the idea of an autonomous trans oceanic surface vessel.<br/> <br/> the barebones idea revolves around a solar powered model boat, controlled and navigated using the RPi.<br/> <br/> I understand there maybe other guidance systems around but they...
by st599
Mon Mar 05, 2012 11:24 am
Forum: General discussion
Topic: A plea to the Foundation re. MPEG-2
Replies: 153
Views: 47104

Re: A plea to the Foundation re. MPEG-2

welshblob said:

Also to boarsblood you do not need a mpeg2 license for handbrake as that uses a software codec for decode. Typically licenses are only needed for embedded devices such as the Pi. 

Utter tosh.  Where on Earth did you get that idea from?
by st599
Wed Feb 15, 2012 10:44 am
Forum: General discussion
Topic: What kind of HDMI cable? Is 1600x900 OK? Hi10P?
Replies: 26
Views: 8647

Re: What kind of HDMI cable? Is 1600x900 OK? Hi10P?

<t>JamesH said: <br/> <br/> <br/> ReimuHakurei said: <br/> <br/> <br/> <br/> I have a 22" 1600x900 LCD monitor. Will the R-Pi work with this monitor at it's native resolution?<br/> The R-Pi foundation said on Twitter that the GPU is very flexible. Is it possible that Hi10P H.264 video decoding could...
by st599
Thu Feb 09, 2012 11:43 am
Forum: General discussion
Topic: "Clive", Gove, teaching and "ICT" in UK Schools
Replies: 17
Views: 4548

Re: "Clive", Gove, teaching and "ICT" in UK Schools

<t>Garacesh said: <br/> <br/> <br/> I'm currently an Apprentice IT Technician at a public secondary school in the UK and I'd love some kind of afterschool class with Pi's (even though I don't know how much use I'd be there - I know naff all about Linux). Unfortunately, I doubt the kids here really h...
by st599
Mon Jan 09, 2012 2:01 pm
Forum: Other projects
Topic: film/movie conversion.
Replies: 7
Views: 2636

Re: film/movie conversion.

DivX, XviD are both MPEG4 part 2.  H.264 is MPEG4 part 10, a superset of part 2.  All should be fine.
by st599
Sun Dec 25, 2011 1:29 pm
Forum: General discussion
Topic: warranty
Replies: 31
Views: 8471

Re: warranty

<t>You'll be covered by the EU Distance Selling Directive and EU Sale of Goods and Guaruntees Directive if you're buying in the EU.<br/> <br/> Device has to be compliant and fit for purpose when broaught to market.  Fit for purpose for Electronics is usually 2 years.  I'd have to check what it says ...
by st599
Sat Dec 17, 2011 9:33 am
Forum: General discussion
Topic: HDMI input?
Replies: 10
Views: 4471

Re: HDMI input?

<t>Presumably the film industry would be using HDSDI rather than HDMI.<br/> <br/> If the OP really wants a RAIDed HDSDI recorder, I'm sure that someone could provide one with a little bit of change from £10k.<br/> <br/> If the RasPi has say 16 GB of spare storage, that's slightly more than a minute ...
by st599
Mon Nov 28, 2011 10:28 am
Forum: General programming discussion
Topic: Educational Programming Language
Replies: 73
Views: 25359

Re: Educational Programming Language

Occam or Ada.
by st599
Wed Nov 23, 2011 2:43 pm
Forum: Staffroom, classroom and projects
Topic: Inspirational people in Computer Science
Replies: 99
Views: 20736

Re: Inspirational people in Computer Science

<t>Quote from jamesh on November 22, 2011, 22:30<br/> Quote from st599 on November 15, 2011, 14:32<br/> Obviously we'd have to get Hugh Laurie away from that God-awful remake of Sherlock Holmes based in a hospital with his dodgy accent.<br/> <br/> <br/> Just saw this - might be difficult getting him...
by st599
Mon Nov 21, 2011 3:40 pm
Forum: Staffroom, classroom and projects
Topic: Inspirational people in Computer Science
Replies: 99
Views: 20736

Re: Inspirational people in Computer Science

Quote from MDC on November 18, 2011, 18:56
If only Johnny Ball was still presenting TV for children

Or Professor Heinz Wolff
by st599
Wed Nov 16, 2011 11:33 am
Forum: General discussion
Topic: sdk?
Replies: 11
Views: 8309

Re: sdk?

Not sure he wants an SDK. More a \"How to decode H.264 using the RaspberryPi GPU\" Tutorial.
by st599
Tue Nov 15, 2011 2:32 pm
Forum: Staffroom, classroom and projects
Topic: Inspirational people in Computer Science
Replies: 99
Views: 20736

Re: Inspirational people in Computer Science

<t>Quote from psergiu on November 7, 2011, 09:02<br/> 1) I'm not from the UK and from all the names of UK personalities i have read from the last pages, i recognized only Stephen Fry - and all i know about him is that he's a comedian and drives a cab. And i am a bit more knowledgeable in UK personal...
by st599
Mon Nov 14, 2011 10:49 am
Forum: Other projects
Topic: Techniques to use GPU for Decoding
Replies: 2
Views: 1481

Re: Techniques to use GPU for Decoding

Can someone provide the command line required to use the on-board GPU acceleration for H.264 decoding?

Thanks
by st599
Mon Nov 14, 2011 9:48 am
Forum: General discussion
Topic: Version C?
Replies: 32
Views: 7159

Re: Version C?

Surely it would be a Raspberry Pi Master next. Otherwise your naming convention is screwed.
by st599
Fri Nov 11, 2011 2:49 pm
Forum: General discussion
Topic: Idea on Media Transcoding
Replies: 3
Views: 1239

Re: Idea on Media Transcoding

Uncompressed P50 HD is around 3Gb/s and uncompressed SD is 270 Mb/s. You\'ll need a very good network to do that.
by st599
Thu Nov 10, 2011 12:30 am
Forum: General discussion
Topic: Composite output: resolution and overscan
Replies: 11
Views: 3342

Re: Composite output: resolution and overscan

Tufty: before who invented PAL.

Secam was a nightmare, it was only really used in transmission.
by st599
Mon Nov 07, 2011 2:10 pm
Forum: General discussion
Topic: Schools and networks
Replies: 4
Views: 1294

Re: Schools and networks

Nope, Models should be
Model A
Model B
Model B+64
Model B+128
and Master

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