Driftnote

Since I install Max 7.2 my camera no longer works.

jit.grab loads the camera. the green light on my laptop turns on but there is no image on the jit.window not jit.pwindow.

I am using the jit.grab reference example to run the test.

MacBook Pro (Retina, Mid 2012)
2.7 GHz Intel Core i7
NVIDIA GeForce GT 650M 1024 M
16 GB 1600 MHz DDR3


jit-grab-not-working

I have the same problem with Max 6.1.5...

Just try to open an old patch and it doesn't seems to reach any signal. Tried with the jit.qt.grab reference as well and no luck...

I've tried with photo booth, isadora, quarz composer and they are able to use the built-in camera..

I have the same problem with Max 6.1.5...
Just try to open an old patch and it doesn't seems to reach any signal. Tried with the jit.qt.grab  reference as well and no luck...
I've tried with photo booth, isadora, quarz composer and they are able to use the built-in  camera..

MacBook Pro (15-inch, Mid 2012)
2,7 GHz Intel Core i7
16 GB 1600 MHz DDR3
NVIDIA GeForce GT 650M 1024 MB


I realized that you have to send the "getvdevlist" and parse the right out put of jit.grab just like in the help file. Then in the umenu select the camera and it should work. It's annoying to have to do this extra steps since it wasn't necessary in the past.

Thanks Drifnote. By the way that was the image of the help file..

In every case you were right. After starting the q-metro and opening the camera. Clicking to get device list and then select the right one in the umenu it works.

this below is a simple patch that does the work as soon as you click the open message

Thanks Drifnote. By the way that was the image of the help file..
In every case you were right. After starting the q-metro and opening the camera. Clicking to get device list and then select the right one in the umenu it works.

this below is a simple patch that does the work as soon as you click the open message
Hope that it could help


Awesome! that does the trick and i saved it as a snippet for future use!

Awesome thanks dude, this worked with my new Touchbar Macbook and latest Max. It was so annoying!

Today I tried yo run my webcam patches but my camera is not viewed by Max properly. Tried QT and VIDDLL options on Jitter. It is detected on the umenu, but black screen when turning on and the messages:

With Vizzie the same. Tried with dx.grab, qt.grab and grab objects.

I have Win7, directx and quick time installed, the webcam is working ok with another software both viewing and recording, 32bits of resolution on the screen. Any idea?

system and max version : Max 7.3, Windows 7, GPU Intel.

 Today I tried yo run my webcam patches but my camera is not viewed by Max properly.   Tried QT and VIDDLL options on Jitter. It is detected on the umenu, but black screen when turning on and the messages:
                               COULD NOT BIND MONIKER TO FILTER
                               COULD NOT FIND VIDEO CAPTURE DEVICE
With Vizzie the same. Tried with dx.grab, qt.grab and grab  objects.
I have Win7, directx and quick time installed, the webcam is working ok with another software both viewing and recording, 32bits of resolution on the screen. Any idea?
                               Thanks very much!

system and max version : Max                               7.3, Windows 7, GPU Intel.

what changed on your system? are your camera drivers up to date?

Hi and thanks. Nothing changed. Do you think it is a driver problem from the camera, not from Max? Thanks again.

i would check out camera drivers, maybe uninstall and reinstall.

you could also try deleting or moving your Max preferences:

Delete your Preferences files in the folder: 'c:\Users\[Your username]\AppData\Roaming\Cycling 74'. Note that 'Application Data' is an invisible folder and may need to be made viewable.

i would check out camera drivers, maybe uninstall and reinstall. 

you could also try deleting or moving your Max preferences:
Delete your Preferences files in the folder: 'c:\Users\[Your username]\AppData\Roaming\Cycling 74'. Note that 'Application Data' is an invisible folder and may need to be made viewable.

I'm using the Max 7.3.5 Mac version. jit.grab not working :< 

jit.grab: jit.qt.grab: could not create video channel -9405

jit.grab: jit.qt.grab: error opening device for grab.

I'm using the Max 7.3.5 Mac version. jit.grab not working :< 
it shows error message like these:
jit.grab: jit.qt.grab: could not create video channel -9405
jit.grab: jit.qt.grab: error opening device for grab.

did you set your video engine to qt? if so, and you want to keep it that way, try [ jit.grab @engine avf ]

otherwise change your video engine preference back to avf.

did you set your video engine to qt? if so, and you want to keep it that way, try [ jit.grab @engine avf ]
otherwise change your video engine preference back to avf.

I use the logitech small camera to get video in, it works in max 7.0.1, but not working in max7.3.5 anymore, also max can't find apple built-in isight camera anymore in 7.3.5. The name of logitech camera is not showing in the umenu.

Screen Shot 2018-04-20 at 12.54.44 AM.png

Hi Rob,
Thanks for replying! 
I use the logitech small camera to get video in, it works in max 7.0.1, but not working in max7.3.5 anymore, also max can't find apple built-in isight camera anymore in 7.3.5. The name of logitech camera is not showing in the umenu.

open your Max application preferences window, make sure All is selected, scroll down to find "Video Engine" and change it to "avf". restart Max.

Woow~~Thanks alot Rob, I just tried and it works! Really appreaciate! (Also, do you know any online community to learn more about maxmsp?

Hi, I'm receiving the same error messages:

jit.grab: jit.qt.grab: error opening device for grab

I'm running an earlier version of Max - 5.1.9, and "Video Engine" isn't listed under preferences. Anyone know where I can find it to try the "avf" adjustment?

jit.grab: jit.qt.grab: could not create video channel -9405 

 I'm running an earlier version of Max - 5.1.9, and "Video Engine"  isn't listed under preferences.  Anyone know where I can find it to try the "avf" adjustment?

in max 6 we introduced qtkit drivers to support facetime cameras for jit.grab.

i don't believe max 5 has any support for facetime cameras.

the avf engine was introduced in max 7.
in max 6 we introduced qtkit drivers to support facetime cameras for jit.grab.
i don't believe max 5 has any support for facetime cameras.