[Swansea Hackspace] Hackspace Digest, Vol 25, Issue 7
Debi Withers
debiwithers at yahoo.co.uk
Mon Jan 5 17:31:13 GMT 2015
in answer to the question of how the video needs to be displayed, there is no manipulation it just needs to be selected and played back, possibly paused or rewound.
Video will only be one of the channels, the other 3 will be jpeg or pdf; 4 audio (mp3s I expect)
would this still make the raspberry pi the best option?
thanks again everyone for this amazing input and ideas,
debi www.debi-rah.net
Publishing - http://www.hammeronpress.net
Create-Ahh - http://create-ahh.org.ukPublic History - http://feministarchivesouth.org.uk
Great Bear Analogue & Digital Media Tape Blog- http://www.thegreatbear.net/blog/
https://twitter.com/deborahmwithers
On Monday, 5 January 2015, 9:24, "hackspace-request at swansea.hackspace.org.uk" <hackspace-request at swansea.hackspace.org.uk> wrote:
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Today's Topics:
1. Tap (Ceri Clatworthy)
2. Re: New Member and project Question (jon lilley)
3. Re: New Member and project Question (Debi Withers)
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Message: 1
Date: Mon, 5 Jan 2015 16:39:35 +0000
From: Ceri Clatworthy <ceri.clatworthy at gmail.com>
To: Hackers <hackspace at swansea.hackspace.org.uk>, Justin Mitchell
<justin at discordia.org.uk>
Subject: [Swansea Hackspace] Tap
Message-ID:
<CAO=DJn-x1Ed5C9+d0Nv3vr1aV9LR98iJTWonJz3-s6UUMvGbzw at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Do you still need to re tap the thread? ??
Got work tools I could bring. .
What size M8 ??
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Message: 2
Date: Mon, 5 Jan 2015 16:41:56 +0000
From: jon lilley <jon.j.lilley at gmail.com>
To: Swansea Hackspace <hackspace at swansea.hackspace.org.uk>
Subject: Re: [Swansea Hackspace] New Member and project Question
Message-ID:
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Hope you don't mind my popping in my two penn'orth here. :)
Depending on how the video & images need to be mixed and controlled, I'd be
thinking of something like a Raspberry Pi to control each screen (with any
needed video files duplicated on each machine) and have them controlled by
the laptop and/or a "control surface" with the knobs & dials
required...easy enough to do with Arduino and a bit of coding, I'd think?
I think it really depends on how much processing you're going to need to do
with the video.. The Pi is good at displaying, but a little underpowered
for manipulation.
Jon
On 5 Jan 2015 16:28, "Ceri Clatworthy" <ceri.clatworthy at gmail.com> wrote:
> If you could cope with a slideshow (cartoon like graphics)
>
> then 2344115
> <http://uk.farnell.com/mikroelektronika/mikroe-1429/ft800-connect-eve-add-on-board/dp/2344115> from
> Farnell,
>
> http://www.ftdichip.com/EVE.htm
>
> at ?53, each, not the cheapest solution, but amazingly modular.
> Keeping your code over head very low.
>
> Also it can (if i remember correctly) play wav files, and do graphs charts
> etc.
>
> additionally for ?26, there is VM800C43A-N
> <http://uk.farnell.com/ftdi/vm800c43a-n/ft800-eve-module-fpc-ffc-40-lcd/dp/2355186>
> ,
> But you will need a PSP screen (or comparable)
>
> One of our other members has used an Ardweeno version, intended for
> creating 80's style video game consoles.
>
> Ceri
>
> On Mon, Jan 5, 2015 at 3:36 PM, Ceri Clatworthy <ceri.clatworthy at gmail.com
> > wrote:
>
>> What have you in mind for the screens,
>> are you thinking of 4 PC like monitors,
>>
>> because, just driving 4 (additional) monitors from a laptop could be very
>> expensive !!
>>
>> or something a little more basic, may be not as good as a Nintendo DS /
>> Sony PlayStation Portable screen
>>
>> perhaps 280*320 pixels (lots of flavors available from china)
>>
>>
>> If you only need to faid the back-light up/down, - giving appearance of
>> screen on/off,
>> Then that is potentially VERY simple.
>>
>> As always,
>> More Info,
>> More Help :)
>>
>> Ceri
>>
>> On Thu, Jan 1, 2015 at 3:53 PM, Debi Withers <debiwithers at yahoo.co.uk>
>> wrote:
>>
>>>
>>> Hello there,
>>>
>>>
>>>
>>> I am a new member to this list and am considering joining the Swansea
>>> Hackspace fir 6 months next year to realise a project.
>>>
>>> I am writing initially here to get some advice and some indication of
>>> how difficult it would be.
>>>
>>> So here is the project:
>>>
>>> I want to make a 'transmission machine' which can simultaneously play
>>> back up to 8 channels of digitised media - video, images and audio.
>>>
>>> Ideally the levels will be controlled by an external device, like a
>>> mixing desk/ interface, because it is important that people using the
>>> machine have the physical experience of controlling the levels - i.e., how
>>> loud the audio can played, the clarity of the image. The selections of the
>>> digitised files will be made via a laptop.
>>>
>>> Attached to the 8 outputs will be four screens and 1-4 speakers -
>>> although all the audio channels will probably be played through one speaker
>>> - so comparable to a live mix which plays back multiple audio channels.
>>>
>>> The one complicated thing perhaps is ideally to separate the audio and
>>> moving image of the video file so that the audio and image levels can be
>>> controlled separately, i.e., turn down the sound but still play the image;
>>> turn down the image, still hear the sound.
>>>
>>> I've asked a friend of mine who seems to think this would be possible
>>> through Arduino, but I wanted to check in with a local hackspace for advice
>>> to flesh out the idea.
>>>
>>> I've attached a diagram if this helps to explain the idea better.
>>>
>>> I live in Drefach Felindre but could travel to Swansea to work on the
>>> circuit if people could help me. I don't quite have the technical expertise
>>> to manage it myself!
>>>
>>> I see there is a workshop on 8 Jan but sadly I cannot make this date...
>>>
>>> Many many thanks in advance for your help -
>>>
>>> debi
>>>
>>>
>>> _______________________________________________
>>> Hackspace mailing list
>>> Hackspace at swansea.hackspace.org.uk
>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>
>>>
>>
>
> _______________________________________________
> Hackspace mailing list
> Hackspace at swansea.hackspace.org.uk
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>
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Message: 3
Date: Mon, 5 Jan 2015 17:21:46 +0000 (UTC)
From: Debi Withers <debiwithers at yahoo.co.uk>
To: Emyr Morris <em at preseli.com>, Swansea Hackspace
<hackspace at swansea.hackspace.org.uk>
Subject: Re: [Swansea Hackspace] New Member and project Question
Message-ID:
<1333146619.4808762.1420478506238.JavaMail.yahoo at jws11134.mail.ir2.yahoo.com>
Content-Type: text/plain; charset="utf-8"
hi Emyr,?
I've been conversing with Ceri (I think off list)...
something I didn't make clear in previous email was this:?
The channels being played back will comprise of
4 audio (most likely mp3s, because I want file sizes to be as small as possible)
3 image (so either pdfs OR JPEGS - which might need to be scrolled in order to read a document)
1 video (I say this because apparently the size of video files might pose a problem if I was to stream more than one video file from a laptop)
I think this will make a difference to the set up as video files are big....
SD video is also fine, it doesn't have to be great quality - the project is about transmission so the processes through which this occurs (the qualities/ mutations of the signal, etc), are an important part of the configuration.?
When the image is clear, it is important that JPEGs, etc are not pixelated.?
Once I figure out what equipment is required, enquiries at the BB list would be great...
thank you all so much
debi
?www.debi-rah.net
Publishing -?http://www.hammeronpress.net?
Create-Ahh - http://create-ahh.org.ukPublic History -?http://feministarchivesouth.org.uk
Great Bear Analogue & Digital Media Tape Blog-?http://www.thegreatbear.net/blog/
https://twitter.com/deborahmwithers
On Monday, 5 January 2015, 7:27, Emyr Morris <em at preseli.com> wrote:
I very doubt you will manage that with an Arduino... there is a shield that will overlay graphics (rudimentary) over composite video.
Composite video is pretty much a no-no these days, between their artefacts and very low res (575 lines ish)
If you are working to a low budget then your best place to start would probably be an existing computer (needs to be decent) and spend your bucks on a very good graphics card that has 8 outputs (or two graphics cards with four (quad) outputs)
This is how we put the score screens on podiums on TV quiz shows.
You would then write code in something like Visual Basic that would then populate the screens
I say 8 outputs as you will need one screen for control and then the other 4 display screens
The audio out would come via your sound card / amps / speakers etc
This way you will be able to use existing video libs to open your various AVI/MPEG files and send them to the correct destination.
This then goes back to your computer - to play four different videos at the same time will require some pretty good hardware, while your graphics cards will do most of the donkey work the computer will have to be fairly decent with plenty of RAM to be able to cope with the data throughput. So fast processors and fast RAM and plenty of it.
An ambitious project.
On the other hand, depending on the quality required, there is a lot of non HD equipment now coming on the market as old SD studios and OB trucks are closing down.
There is a lot of kit that can do this sort of thing available on BB List. I have to do the school run now so I don't have time to search for a suitable piece of kit for you right now. http://www.bblist.co.uk/
I can make enquiries for you if you like.
Emyr
On 1 January 2015 at 15:53, Debi Withers <debiwithers at yahoo.co.uk> wrote:
Hello there,
I am a new member to this list and am considering joining the Swansea Hackspace fir 6 months next year to realise a project.
I am writing initially here to get some advice and some indication of how difficult it would be.
So here is the project:
I want to make a 'transmission machine' which can simultaneously play back up to 8 channels of digitised media - video, images and audio.
Ideally the levels will be controlled by an external device, like a mixing desk/ interface, because it is important that people using the machine have the physical experience of controlling the levels - i.e., how loud the audio can played, the clarity of the image. The selections of the digitised files will be made via a laptop.
Attached to the 8 outputs will be four screens and 1-4 speakers - although all the audio channels will probably be played through one speaker - so comparable to a live mix which plays back multiple audio channels.
The one complicated thing perhaps is ideally to separate the audio and moving image of the video file so that the audio and image levels can be controlled separately, i.e., turn down the sound but still play the image; turn down the image, still hear the sound.
I've asked a friend of mine who seems to think this would be possible through Arduino, but I wanted to check in with a local hackspace for advice to flesh out the idea.??
I've attached a diagram if this helps to explain the idea better.
I live in Drefach Felindre but could travel to Swansea to work on the circuit if people could help me. I don't quite have the technical expertise to manage it myself!
I see there is a workshop on 8 Jan but sadly I cannot make this date...
Many many thanks in advance for your help -
debi
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