[PD] Re: [GEM-dev] Gem: the nVidia bug with pix_film

Etienne Desautels titi at sat.qc.ca
Sat Aug 7 03:51:31 CEST 2004

Thanks for your answer. I did more tests with RGB and non-rectangle 
textures. Here are my findings:

For the RGB, it works but as we all know, that hit the performance a 

For the non-rectangle texture, when I set pix_texture to non-rectangle, 
the video appears OK but the playback is jerky (1 frame/sec). I had the 
same problem when trying the last version of gem4mac, the default 
should be non-rectangle.

But I found a way to go around the bug: I set the pix_texture to 
non-rectangle just before I load the clip and after a small delay (the 
time it take to load the clip) I switch the pix_texture back to a 
rectangle texture and all is well!

I'm not sure if pix_movie works with non-rectangle texture because the 
bug of the jerky playback is not there. But anyway...


On 04-08-04, at 17:22, chris clepper wrote:

> Try using non-rectangle textures and/or RGB textures.  This will work, 
> but
> introduce a performance hit.  My guess is that pix_movie is defaulting 
> to one
> of these settings for some reason.
> cgc
> Quoting Etienne Desautels <titi at sat.qc.ca>:
>> Hello list,
>> a few weeks ago, I ask you about the bug with pix_film and the nVidia
>> cards. Cgc told me that it was a know bug and suggest me to buy an ati
>> card. It could be an option but I would really prefer if I can use my
>> nvidia card.
>> As I say before, I don't have the bug with pix_movie and I can correct
>> it with pix_film by turning off an on the rendering of the gemwin 
>> after
>> the movie is loaded. Also, I don't have the bug with the 0.87 version
>> of gem.
>> In view of this facts I was thinking that it could be surely be
>> possible to find a way to avoid the bug. I did a few test by modifying
>> gem and recompile it but without any success. But I'm far from a
>> C++/openGL/carbon guru.
>> I would really appreciate some help on this subject!
>> Maybe I'm wrong but I feel it's probably just a small difference in 
>> the
>> way the video is transfer to a texture between pix_movie and pix_film
>> that avoid the bug in pix_movie and when I think about it I start
>> having problem sleeping!
>> Thanks
>> Etienne
>> _______________________________________________
>> GEM-dev mailing list
>> GEM-dev at iem.at
>> http://iem.at/cgi-bin/mailman/listinfo/gem-dev
> ----------------------------------------------------------------
> This message was sent using IMP, the Internet Messaging Program.

More information about the Pd-list mailing list