Not sure what all that means :) but I tried a test where I already have the qtz comp up & running in QC and then I run the program with the -renderAtTime:. Same result, blank images, only difference is that the camera light is on because of QC. The program works well with other compositions that don't use the camera, so maybe there's some sort of underlying incompatibility with -renderAtTime: and the VIP.
On Nov 19, 2010, at 4:35 PM, George Toledo wrote: > What happens if the video object is triggered to enable by another object, > like a one shot interpolate, after the comp is loaded instead of the video > object being left in enable by default when it's loaded? > > (A stab in the dark for sure...) > > -GT > > > > On Fri, Nov 19, 2010 at 7:30 PM, Jonathon Kuo > <[email protected]> wrote: > > On Nov 19, 2010, at 4:22 PM, Christopher Wright wrote: > > >> Alas, adding a runloop and sleeps don't help. It seems the problem is > >> internal to the -renderAtTime: method. It doesn't check if the comp uses > >> the Video Input Patch, and so doesn't wait for the camera to come on. If > >> the video patch had a synchronous flag, that might fix it. Guess I'll try > >> to find another route... > > > > What if you do a -renderAtTime:, then sleep a few seconds, then another > > -renderAtTime:? > > I tried that, and a lot of other crazy things, but it seems that the qtz > composition isn't open/running until -renderAtTime: hits it, and when it's > got the image, it closes/stops the comp, no matter how many times or how fast > you ask it to render. It does some fancy legwork to simulate "offsetting" > itself so many seconds into the composition, but even setting the 'start > time' to 10000 seconds or so, -renderAtTime: doesn't let the camera come on, > it just takes quick snapshots and returns blank images. I also tried very > closely spaced hits, like .001, but no go. Very frustrating! > > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Quartzcomposer-dev mailing list ([email protected]) > Help/Unsubscribe/Update your Subscription: > http://lists.apple.com/mailman/options/quartzcomposer-dev/gtoledo3%40gmail.com > > This email sent to [email protected] > > > > -- > George Toledo > [email protected] > www.georgetoledo.com > > The information contained in this E-mail and any attachments may be > confidential. > If you have received this E-mail in error, please notify us immediately by > telephone or return E-mail. > You should not use or disclose the contents of this E-mail or any of the > attachments for any purpose or to any persons. >
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