Jason Kim

I saw web to find reference. and I found one, that is Live Video Delay.

It was good and satisfied me But it's fault was no Video out.

Actually, I need Delayed SDI Video Output.

during a few days, I've study MSP and Max7.

Now I've complete all difference to development.

To get SDI video In, usually we use jit.grab or jit.qt.grab,

To present SDI Video out, usually we use jit.qt.videoout.

But, when open blackmagic device with "open" message, the device present SDI Video OUT automatically.

In order to make delay software, sdi video must wait during delayed timing.

Finally I knew that I can't control SDI Video OUT with jit.grab Function.

so I've look up jit.qt.videoin, But there are no like function.

I want control each Video IN and Video OUT.

If there's no option this problem, I am considering buy one more Blackmagic device with thunderbolt hub.

If I have two device, can I make delay software successfully?

ps. I had MacBook and Connect with blackmagic capture device.

hi. everyone. I'm happy to meet you.
Now I'm develop my new project.
That is making simple delay software.
I saw web to find reference. and I found one, that is Live Video Delay.
It was good and satisfied me But it's fault was no Video out.
Actually, I need Delayed SDI Video Output.

during a few days, I've study MSP and Max7.
Now I've complete all difference to development.
there's remain one question.

To get SDI video In, usually we use jit.grab or jit.qt.grab,
To present SDI Video out, usually we use jit.qt.videoout.

But, when open blackmagic device with "open" message, the device present SDI Video OUT automatically.
In order to make delay software, sdi video must wait during delayed timing.
Finally I knew that I can't control SDI Video OUT with jit.grab Function.

so I've look up jit.qt.videoin, But there are no like function.
I want control each Video IN and Video OUT.
is there any good idea?

If there's no option this problem, I am considering buy one more Blackmagic device with thunderbolt hub.
If I have two device, can I make delay software successfully?
thank's for reading.
have a nice day

jit-grab-jit-qt-videoout-blackmagic-ultra-studio-express-problem

i'm not entirely sure what you are asking. jit.qt.videout can be used with blackmagic devices to send Jitter video out. you can do whatever you want to that video prior to sending out, including delay your input signal.

jit.grab works with blackmagic capture devices to get video in to Jitter.

some blackmagic devices only allow you to either capture video in, or send video out, but not both. check the specs of your blackmagic device to determine if this limitation is present.

so I will upload my patchers text with explained picture in this thread.

this picture is reference for explain of my question.

And If you paste my patches text and run it, it looks like run well.

number 1 Red Box area is Video Input with Blackmagic Express Studio.

number 2 Green Box area is Video Output with same device.

actually, this window shows delayed video form input video.

if you have soem video device, I recommand test it.

Output Video form device is not delayed Video.

ps. I don't know how to add my paches text.

so I've paste my patches text below, sorry ^^

Thanks for your reading and Have a nice evening.

Thanks for your greate reply!!!.
when I waken up, I read your reply.
my question hasn't a exact point.
so I will upload my patchers text with explained picture in this thread.
this picture is reference for explain of my question.
And If you paste my patches text and run it, it looks like run well.
but there are some problem.
please, see below.

number 1 Red Box area is Video Input with Blackmagic Express Studio.
Input Video area is work well.

number 2 Green Box area is Video Output with same device.
can you see after delay window?
actually, this window shows delayed video form input video.
Delay window works file.
But jit.qt.videoout do not works fine.
if you have soem video device, I recommand test it.
Output Video form device is not delayed Video.
my problem is it.

ps. I don't know how to add my paches text.
so I've paste my patches text below, sorry ^^
Drag and Press Ctrl C & V
Thanks for your reading and Have a nice evening.


you are not plugging the delayed video output (the output of the jit.matrixset) into the input of the jit.qt.videoout.

yes, It's my fault, my last patch wasn't connected to jit.qt.videoout.

as your recommand, I've connect it in this morning. and tested it.

I've add one more jit.pwindow for confirming at jit.qt.videoout object

confirming window and after delay window works fine.

But, SDI Video OUT is not dealyed SDI Video.

I think that jit.qt.videoout obejct & jit.grab object looks like fight together to get control of device .

because when I connect open message to jit.grab & jit.qt.videoout at sametime, jit.grab didn't work right.

I think they can't use at same time in one device. is right?

this is my new patch , could you please see my new patch what's wrong?

as your recommand, I've connect it in this morning. and tested it.
 I've add one more jit.pwindow for confirming at jit.qt.videoout object

confirming window and after delay window works fine.
But, SDI Video OUT is not dealyed SDI Video.

I think that jit.qt.videoout obejct & jit.grab object looks like fight together to get control of device .
because when I connect open message to jit.grab & jit.qt.videoout at sametime, jit.grab didn't work right.

this is my new patch , could you please see my new patch what's wrong?


Hi, Im having problem running the patch. It seems Max cant find jit.qt.videoout object. Ive tried reinstalling max and quicktime. Ive tried max 6 and max 7, and it still cant find the object. I was trying only 32bit versions on 64bit windows. Any idea why the object cant be loaded ?

have you named a patch "jit.qt.videoout" ? that's usually the culprit when Max can't find built in externals.

jit.grab & jit.qt.videoout with blackmagic Ultra Studio Express Problem...