[PD] Fwd: raspberry pi and logitech c920 webcam

Csaba Láng langcsaba at gmail.com
Thu Feb 5 13:26:32 CET 2015


Simon,

finger crossed for your efforts.
Basically, I planned to use a webcam with fullHD and a simple mask in it,
should not be too CPU consuming, but I will try an other solution.
Anyway, I am totally interested in your progress, please let me inform your
achievements.

Good luck!


On Wed, Feb 4, 2015 at 4:07 PM, Simon Wise <simonzwise at gmail.com> wrote:

> On 04/02/15 21:20, Julian Brooks wrote:
>
>> Hello,
>>
>> RPi currently cannot run opengl (only opengl es) which is required for
>> GEM,
>> so afaict no GEM on the RPi currently.
>>
>
> you can't get video into GEM (yet), I have managed to control playback,
> overlays and mapping from within pd with some very messy scripting and
> mucking around with the sample programs in C, but so far it is all one-off
> hacks for particular tasks. The first more generally useful outcome is a pd
> external that talks to omxplayer via dbus, allowing much better timing and
> volume control, it is working for an exhibition that opens shortly ... and
> I am currently trying to get the player rendering to a texture as my next
> step... which will then be able to be moved around, layered etc, and
> properly wrapped up as an external.
>
> A big limitation is the resolution ... 1080p can have one layer (only
> just), but it is looking like once I get rid of as much of the overhead as
> possible, putting as much as possible into pd externals, then two layers of
> 720p (which is plenty good enough for most projectors) should be possible.
> Dropping the resolution further will give much more flexibility, and is
> fine for lots of material.
>
> But it is slow work for me, I'm learning a lot in the process.
>
>
> Simon
>
>
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