Raspberry Pi video out. A good source of video?

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G4GUO
Posts: 629
Joined: Tue Feb 16, 2010 12:51 pm

Re: Raspberry Pi video out. A good source of video?

Post by G4GUO » Fri Aug 24, 2012 4:42 pm

Here is some good news for us all on the PI front!

http://www.raspberrypi.org/archives/1839

pa3bwe
Posts: 3
Joined: Fri Jan 18, 2013 1:36 pm

Re: Raspberry Pi video out. A good source of video?

Post by pa3bwe » Fri Jan 18, 2013 1:46 pm

Ls,

I've been using my RPI as a video- and audiosource for my ATV station, have a look here : http://tinyurl.com/asue3xu

73's, Antoon / pa3bwe

g4bbh
Posts: 72
Joined: Thu Mar 13, 2008 7:19 pm

Re: Raspberry Pi video out. A good source of video?

Post by g4bbh » Mon Jan 21, 2013 11:58 pm

Hi Antoon
I wonder why you use the resolution 640 x 480. The PAL composite output is capable of accepting 720x576.
Dick G4BBH

pa3bwe
Posts: 3
Joined: Fri Jan 18, 2013 1:36 pm

Re: Raspberry Pi video out. A good source of video?

Post by pa3bwe » Fri Jan 25, 2013 12:21 pm

Hi Dick,

What would be the advantage ? PAL has only 625 lines, or do I miss something ?

-antoon

g4bbh
Posts: 72
Joined: Thu Mar 13, 2008 7:19 pm

Re: Raspberry Pi video out. A good source of video?

Post by g4bbh » Fri Jan 25, 2013 11:19 pm

There are 625 li8nes yes but normally only 576 are used. 720 pixels is the horizontal resolution. Using 720 x 576 allows the highest resolution that can be reasonably converted to composite video and gives the best possible results with test cards which use the full display area. On some televisions this will not all be visible.
Note that 480 vertical pixels will not fill all the active lines unless upconverted to 576 lines and this intruduces loss.
Dick G4BBH

pa3bwe
Posts: 3
Joined: Fri Jan 18, 2013 1:36 pm

Re: Raspberry Pi video out. A good source of video?

Post by pa3bwe » Thu Jan 31, 2013 10:30 am

Hi Dick,

You're right :D , I mixed the X (640) with the number of lines (625) !

I'll correct it !

-antoon

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