video player

vicos

Hi all, and welcome me to the forum

I'm just wondering if the propeller chip could be capable of doing video play back or streaming , playing a simple video , it could be great to make a cheap set-up box....

Thanks a lot

Viox

Mike Green

Video streaming might work because of the lower data rates. Keep in mind that the Propeller's video output is limited in the resolution and number of colors. Some people have played with running multiple cogs to increase the number of colors available with VGA output, but the Propeller has only 32K bytes of main memory to use for buffering and the program itself. Have a look at the Hydra forum for some of the work done with the Hydra's 512K RAM expansion card to try to get more colors for the display.

TV output is also limited by the constraints of the NTSC/PAL color format.

Rayman

Just displaying decent quality photos with the Prop is nearly impossible (although Baggers seems to have made some heroic efforts to do so). So, I wouldn't even consider this for a "set top box".

Baggers

Vicos:

You're images have to be either low resolution/quality, as feeding data to it from SD you get ~5K per frame NTSC ~6K per frame PAL so that's 10/12K per 25/30 fps
That's 3 cogs used up without any decoding, 1 for spin handler, one for Rokiki's FSRW and one for a basic TV driver, you would then have 5 cogs ( if you don't have audio ) to generate scanlines from your data.
the Hydra's 512K would give you more ram, but you can only access it with one cog at a time.


Rayman:

thanks [noparse]:)[/noparse]