Gideon Kiers

When using quicktimes in an openGL environment, for instance with 

videoplane or imageunit objects, would you recommend Quicktimes DV- 

PAL format (and uyvy) or PhotoJPeg 640x480 format for optimal speed ?

When using quicktimes in an openGL environment, for instance with  
videoplane or imageunit objects, would you recommend Quicktimes DV- 
PAL format (and uyvy) or PhotoJPeg 640x480 format for optimal speed ?

photjpeg-vs-uyvy

On Jul 19, 2006, at 4:17 AM, Gideon Kiers wrote:

> When using quicktimes in an openGL environment, for instance with 

> videoplane or imageunit objects, would you recommend Quicktimes DV- 

> PAL format (and uyvy) or PhotoJPeg 640x480 format for optimal speed ?

Either one works as UYVY, which is definitely faster for texture 

transfer to the GPU than ARGB. Test on your system for whether DV or 

PhotoJPEG is faster for your pruposes. I've typically found PhotoJPEG 

to decompress faster and be of higher quality (the latter of which is 

unimportant if it's DV source to begin with, however). Note that this 

is of course sensitive to the compression settings, and other things 

like disk and bus speed of the computer you are using, so run some 

empirical tests with your setup and material.

> When using quicktimes in an openGL environment, for instance with  
> videoplane or imageunit objects, would you recommend Quicktimes DV- 
> PAL format (and uyvy) or PhotoJPeg 640x480 format for optimal speed ?

Either one works as UYVY, which is definitely faster for texture  
transfer to the GPU than ARGB. Test on your system for whether DV or  
PhotoJPEG is faster for your pruposes. I've typically found PhotoJPEG  
to decompress faster and be of higher quality (the latter of which is  
unimportant if it's DV source to begin with, however). Note that this  
is of course sensitive to the compression settings, and other things  
like disk and bus speed of the computer you are using, so run some  
empirical tests with your setup and material.

On 19-jul-2006, at 21:20, Joshua Kit Clayton wrote:

> Either one works as UYVY, which is definitely faster for texture 

> transfer to the GPU than ARGB. Test on your system for whether DV 

> or PhotoJPEG is faster for your pruposes. I've typically found 

> PhotoJPEG to decompress faster and be of higher quality (the latter 

> of which is unimportant if it's DV source to begin with, however). 

> Note that this is of course sensitive to the compression settings, 

> and other things like disk and bus speed of the computer you are 

> using, so run some empirical tests with your setup and material.

> Either one works as UYVY, which is definitely faster for texture  
> transfer to the GPU than ARGB. Test on your system for whether DV  
> or PhotoJPEG is faster for your pruposes. I've typically found  
> PhotoJPEG to decompress faster and be of higher quality (the latter  
> of which is unimportant if it's DV source to begin with, however).  
> Note that this is of course sensitive to the compression settings,  
> and other things like disk and bus speed of the computer you are  
> using, so run some empirical tests with your setup and material.
>
> -Joshua


photjpeg vs uyvy