Cycling 74 » Topic: How to Record GL video + MSP audio in Hidef?

How to Record GL video + MSP audio in Hidef?

sabo — Fri, 26 Aug 2011 21:53:31 +0000

Hi C74 aficionados – I would like to record live jitter manipulation to music in OpenGL to have promotional videos for my art. Every time I have tried using the lackluster jit.vcr, by first rendering to a matrix then sending that matrix to jit.vcr, the result has been disgusting. The video is very pixelated and of terrible quality. This is at 1080×720 resolution. How can I record directly from OpenGL rendering?

If there is not a way to record directly from OpenGL, what is the best resolution and codec to use for the highest quality of GL rendering?

Thanks for any help :-)

Re: How to Record GL video + MSP audio in Hidef?

David Beaudry — Sat, 27 Aug 2011 03:18:52 +0000

There’s an amazing duo that I’ve been using to capture at 720p (1080p, too). It uses Syphon, so mac only: Syphon Recorder & Syphon Screen Capture.

http://syphon.v002.info/recorder/

it does record audio, but you have to loop output to input (i.e. connect a cable from your audio output to audio input). a bit kludgy, but it does work.

David

Re: How to Record GL video + MSP audio in Hidef?

hons — Fri, 02 Sep 2011 12:24:05 +0000

i usually use a combination of jit.gl.asyncread and jit.qt.record -
set the jit.qt.record dim to the same dim as your jit.window (the one you render to, (message getsize to your window dumps out the current size).

apple_prores_422 is a high quality codec that does not need too much cpu power (large files, but fast), so i usually take this one.
use the “getcodeclist” message to jit.qt.record (or vcr) to see if it´s installed.

i never used jit.vcr, but shouldn´t it work similarily? maybe you just did not set the dim of jit.vcr – just guessing..

hons

Re: How to Record GL video + MSP audio in Hidef?

tada — Fri, 02 Sep 2011 13:30:35 +0000

there is a program called fraps for windows which does excellent job on openGL graphics on windows…and is also very easy in ude…

Re: How to Record GL video + MSP audio in Hidef?

Garrett — Fri, 02 Sep 2011 18:23:25 +0000

Seperate app on a mac, I use IShowU HD, very reliable, can compress to h.264.

Re: How to Record GL video + MSP audio in Hidef?

zhiwan — Mon, 05 Sep 2011 09:34:43 +0000

hello. i set up a jit.gl.asyncread and jit.qt.record patch to record but i noticed that my recordings are always recorded at twice the speed. so for instance, if i record for a minute, the movie will be 30sec long and played at 2x speed. does this happen to anyone else?

Re: How to Record GL video + MSP audio in Hidef?

jhdkfj39929 — Thu, 08 Sep 2011 11:50:45 +0000

@hons and others. I am also interested. I cannot write prores on Windows but can do DNxHD (an equivalent) or Cinepack (better). But how can I control the settings? Or choose one of the codecs from the overall family (all three above have multiple family members)? All of these codecs have many different options and I do not see them exposed within MAX interface. “lossless, max, min, low, normal, or high” is not enough.

Thanks for sharing the experience.