Question about framegrabbing/video effect chains ..

Zachris Trolin zachris.trolin at
Fri Mar 5 07:12:09 GMT 2010

Thanks. Quasar/Phonon looks promising, even if it is not working or maintained it is interesting as an example of how to go about the wiring. 

/Zachris Trolin

3 mar 2010 kl. 15.58 skrev Martin Sandsmark:

> On Wednesday 3. March 2010 12.48.52 Zachris Trolin wrote:
>> I'm new to QT and would like some pointers of how and what can be done in
>> the way of video manipulation.
>> I'm very interested in how to grab frames, or perform manipulation on
>> framedata using QT and preferable phonon (although any other suggestion is
>> welcome).
>> I would like to give it a try to implement a VJ:ing application, I have
>> used pd, keyworx, grid etc, and they all have some problems.
>> The very first step would be to implement a variable rate videoplayer, but
>> soon after comes frame manipulation: preferably done in QT  (something
>> like the composition demo, but with videostreams. ).
>> Any suggestions?
> There is some API in Phonon for video frame manipulation, but it isn't stable 
> nor supported in all backends yet.
> You can see a demonstration of it here:
> The code for Quasar is here (although unmaintained and probably not working):
> -- 
> Martin T. Sandsmark
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