Re: Saving opengl material to disk

hey adam. there’s an object in max5/jit1.7 called [jit.gl.asyncread]
that is a big helper in getting stuff out of opengl land
efficiently… no matter what, though, the usual things apply that
will result in a reduction of frame rate: your gpu is designed to get
a ton of information from the cpu, not pass tons of information back
to it, and [jit.qt.record]/[jit.vcr] is streaming lots of information
to disk. so your mileage may vary.

recording a smaller size context (i.e. setting your [jit.window] and
[jit.qt.record] to 640×480 or 320×240 rather than fullscreen) will
help quite a bit, as will using a video compression setting that
doesn’t put a huge load on the cpu or the disk (something like
photojpeg). you can always re-compress the movie later.

best.

/luke

On Tue, Dec 23, 2008 at 6:23 PM, Adam Rokhsar wrote:
>
>
> I am new to using Jitter, and can’t find any information about this in the documentation. I have made several patches that extract audio features and use them as parameters for opengl material. Now I am trying to save the video work to disk, and have run into problems.
>
> So far I have sent the opengl information to a matrix so I could use jit.qt.record or jit.qt.vcr, but the results are very poor — slow, many missing frames, etc. I understand the benefits of using opengl, and it doesn’t make sense to me to then force all that intensive graphics processing back onto my machine just to save it to disk. I must be missing something — surely people are saving their opengl work!
>
> Does anyone know a better way? Thanks very much.
>
>

Dec 24, 2008 at 12:34am #147575