# Manipulating 4k input

**URL:** <https://casparcgforum.org/t/manipulating-4k-input/3460>\
**Category:** General\
**Created:** [September 2, 2020, 10:27am UTC](https://casparcgforum.org/t/manipulating-4k-input/3460 "2020-09-02T10:27:59Z")\
**Posts on this page:** 20\
**Page:** 1

<div class="post-metadata">

**Author:** ![miha.markovic](https://casparcgforum.org/letter_avatar_proxy/v4/letter/m/c4cdca/32.png) [@miha.markovic](https://casparcgforum.org/u/miha.markovic)\
**Post date:** [September 2, 2020, 10:27am UTC](https://casparcgforum.org/t/manipulating-4k-input/3460/1 "2020-09-02T10:27:59Z")

</div>

Hi!

Have few questions about capabilities of caspar.

Can caspar downscale from 4k input to hd output?

I want manipulate 4k input:  
crop HD from 4k input and put it on output.

Is this possible?

---

<div class="post-metadata">

**Author:** ![didikunz](https://casparcgforum.org/user_avatar/casparcgforum.org/didikunz/32/7_2.png) [@didikunz](https://casparcgforum.org/u/didikunz)\
**Post date:** [September 2, 2020, 1:36pm UTC](https://casparcgforum.org/t/manipulating-4k-input/3460/2 "2020-09-02T13:36:03Z")

</div>

Sure, you need a 4k capable Decklink card to input the video and play in on a layer on a HD output channel.

---

<div class="post-metadata">

**Author:** ![miha.markovic](https://casparcgforum.org/letter_avatar_proxy/v4/letter/m/c4cdca/32.png) [@miha.markovic](https://casparcgforum.org/u/miha.markovic)\
**Post date:** [September 2, 2020, 2:21pm UTC](https://casparcgforum.org/t/manipulating-4k-input/3460/3 "2020-09-02T14:21:59Z")

</div>

Hi, thank you for answer.

I try this but i get nothing on output. Have Decklink 4k monitor and 4K recorder in computer.  
Is this right settings?

 ![1](https://casparcgforum.org/uploads/default/original/2X/c/c1323d9eafc7caa7923cc360a4c39de86745c663.jpeg)

---

<div class="post-metadata">

**Author:** ![didikunz](https://casparcgforum.org/user_avatar/casparcgforum.org/didikunz/32/7_2.png) [@didikunz](https://casparcgforum.org/u/didikunz)\
**Post date:** [September 2, 2020, 6:01pm UTC](https://casparcgforum.org/t/manipulating-4k-input/3460/4 "2020-09-02T18:01:06Z")

</div>

I don’t know, is the 4k monitor the device 2 in your system? And then it depends on the input format that you send it. Probably 50i and not 25p or something like that. Its not easy to say from here.

---

<div class="post-metadata">

**Author:** ![miha.markovic](https://casparcgforum.org/letter_avatar_proxy/v4/letter/m/c4cdca/32.png) [@miha.markovic](https://casparcgforum.org/u/miha.markovic)\
**Post date:** [September 3, 2020, 10:09am UTC](https://casparcgforum.org/t/manipulating-4k-input/3460/5 "2020-09-03T10:09:35Z")

</div>

Hi,

Now i try with only 1 card in system (decklink 4k extreme 12g)

Input format is 2160p25. If i output same format 2160p25 everything is ok.  
If i output 1080p25 i get nothing and this is from log:

```auto
[2020-09-03 12:05:52.321] [info] Received message from 127.0.0.1: PLAY 1-10 DECKLINK DEVICE 1 FORMAT 2160p2500\r\n
[2020-09-03 12:05:52.337] [error] Exception: C:\Program Files (x86)\Jenkins\workspace\casparcg-server-dep\2.2.x\src\modules\decklink\producer\decklink_producer.cpp(350): Throw in function __cdecl caspar::decklink::decklink_producer::decklink_producer(const struct caspar::core::video_format_desc &,int,const class caspar::spl::shared_ptr<class caspar::core::frame_factory> &,const class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > &,const class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > &,bool)
[2020-09-03 12:05:52.337] [error] Dynamic exception type: class boost::exception_detail::clone_impl<struct caspar::caspar_exception>
[2020-09-03 12:05:52.337] [error] [struct boost::errinfo_api_function_ * __ptr64] = EnableVideoInput
[2020-09-03 12:05:52.337] [error] [struct caspar::tag_msg_info * __ptr64] = DeckLink 4K Extreme 12G [1|1080p2500] Could not enable video input.
[2020-09-03 12:05:52.337] [error] [struct caspar::tag_stacktrace_info * __ptr64] = 0# 0x00007FF6AD3B98AE in casparcg
[2020-09-03 12:05:52.337] [error] 1# 0x00007FF6AD3E8C50 in casparcg
[2020-09-03 12:05:52.337] [error] 2# 0x00007FF6AD5E9905 in casparcg
[2020-09-03 12:05:52.337] [error] 3# 0x00007FF6AD5EB213 in casparcg
[2020-09-03 12:05:52.337] [error] 4# 0x00007FF6AD422438 in casparcg
[2020-09-03 12:05:52.337] [error] 5# 0x00007FF6AD49DF5F in casparcg
[2020-09-03 12:05:52.337] [error] 6# 0x00007FF6AD49B0E0 in casparcg
[2020-09-03 12:05:52.337] [error] 7# 0x00007FF6AD3B45C9 in casparcg
[2020-09-03 12:05:52.337] [error] 8# configthreadlocale in ucrtbase
[2020-09-03 12:05:52.337] [error] 9# BaseThreadInitThunk in KERNEL32
[2020-09-03 12:05:52.337] [error] 10# RtlUserThreadStart in ntdll
[2020-09-03 12:05:52.337] [error]   
[2020-09-03 12:05:52.337] [error]   

[2020-09-03 12:05:52.337] [error] 0# 0x00007FF6AD3B98AE in casparcg
[2020-09-03 12:05:52.337] [error] 1# 0x00007FF6AD3B91DF in casparcg
[2020-09-03 12:05:52.337] [error] 2# 0x00007FF6AD88CC3B in casparcg
[2020-09-03 12:05:52.337] [error] 3# _C_specific_handler in VCRUNTIME140
[2020-09-03 12:05:52.337] [error] 4# _TypeMatch in VCRUNTIME140
[2020-09-03 12:05:52.337] [error] 5# RtlCaptureContext2 in ntdll
[2020-09-03 12:05:52.337] [error] 6# 0x00007FF6AD499968 in casparcg
[2020-09-03 12:05:52.337] [error] 7# 0x00007FF6AD49D1AC in casparcg
[2020-09-03 12:05:52.337] [error] 8# 0x00007FF6AD49C0F3 in casparcg
[2020-09-03 12:05:52.337] [error] 9# 0x00007FF6AD52D145 in casparcg
[2020-09-03 12:05:52.337] [error] 10# 0x00007FF6AD53A8AE in casparcg
[2020-09-03 12:05:52.337] [error] 11# 0x00007FF6AD51DAAC in casparcg
[2020-09-03 12:05:52.337] [error] 12# 0x00007FF6AD5690FD in casparcg
[2020-09-03 12:05:52.337] [error] 13# 0x00007FF6AD56810B in casparcg
[2020-09-03 12:05:52.337] [error] 14# 0x00007FF6AD422438 in casparcg
[2020-09-03 12:05:52.337] [error] 15# 0x00007FF6AD49DF5F in casparcg
[2020-09-03 12:05:52.337] [error] 16# 0x00007FF6AD49B0E0 in casparcg
[2020-09-03 12:05:52.337] [error] 17# 0x00007FF6AD3B45C9 in casparcg
[2020-09-03 12:05:52.337] [error] 18# configthreadlocale in ucrtbase
[2020-09-03 12:05:52.337] [error] 19# BaseThreadInitThunk in KERNEL32
[2020-09-03 12:05:52.337] [error] 20# RtlUserThreadStart in ntdll
[2020-09-03 12:05:52.337] [error]   
[2020-09-03 12:05:52.381] [error] Turn on log level debug for stacktrace.
[2020-09-03 12:05:52.381] [info] Sent message to 127.0.0.1:404 PLAY FAILED\r\n

```

Any idea?

---

<div class="post-metadata">

**Author:** ![didikunz](https://casparcgforum.org/user_avatar/casparcgforum.org/didikunz/32/7_2.png) [@didikunz](https://casparcgforum.org/u/didikunz)\
**Post date:** [September 3, 2020, 10:31am UTC](https://casparcgforum.org/t/manipulating-4k-input/3460/6 "2020-09-03T10:31:12Z")

</div>

> [@miha.markovic](#):
>
> Any idea?

Yes, you can not use the 4k Extreme 12G for input and output in different formats. So use one card as input and another as output.

---

<div class="post-metadata">

**Author:** ![miha.markovic](https://casparcgforum.org/letter_avatar_proxy/v4/letter/m/c4cdca/32.png) [@miha.markovic](https://casparcgforum.org/u/miha.markovic)\
**Post date:** [September 3, 2020, 1:52pm UTC](https://casparcgforum.org/t/manipulating-4k-input/3460/7 "2020-09-03T13:52:21Z")

</div>

same result ☹  
Input: decklink 4k extreme  
Output decklink monitor 4k

---

<div class="post-metadata">

**Author:** ![didikunz](https://casparcgforum.org/user_avatar/casparcgforum.org/didikunz/32/7_2.png) [@didikunz](https://casparcgforum.org/u/didikunz)\
**Post date:** [September 3, 2020, 1:57pm UTC](https://casparcgforum.org/t/manipulating-4k-input/3460/8 "2020-09-03T13:57:44Z")

</div>

What version pf Caspar do you use?

---

<div class="post-metadata">

**Author:** ![miha.markovic](https://casparcgforum.org/letter_avatar_proxy/v4/letter/m/c4cdca/32.png) [@miha.markovic](https://casparcgforum.org/u/miha.markovic)\
**Post date:** [September 3, 2020, 2:16pm UTC](https://casparcgforum.org/t/manipulating-4k-input/3460/9 "2020-09-03T14:16:43Z")

</div>

2.2.0 stable

---

<div class="post-metadata">

**Author:** ![Julusian](https://casparcgforum.org/user_avatar/casparcgforum.org/julusian/32/12_2.png) [@Julusian](https://casparcgforum.org/u/Julusian)\
**Post date:** [September 3, 2020, 3:17pm UTC](https://casparcgforum.org/t/manipulating-4k-input/3460/10 "2020-09-03T15:17:27Z")

</div>

2.2 requires the input format to match that of the channel  
This was fixed in 2.3

---

<div class="post-metadata">

**Author:** ![miha.markovic](https://casparcgforum.org/letter_avatar_proxy/v4/letter/m/c4cdca/32.png) [@miha.markovic](https://casparcgforum.org/u/miha.markovic)\
**Post date:** [September 4, 2020, 6:14am UTC](https://casparcgforum.org/t/manipulating-4k-input/3460/11 "2020-09-04T06:14:40Z")

</div>

Thank you! Its working on 2.3!

Only one think audio is out of sync on ouput. Any solution?

---

<div class="post-metadata">

**Author:** ![didikunz](https://casparcgforum.org/user_avatar/casparcgforum.org/didikunz/32/7_2.png) [@didikunz](https://casparcgforum.org/u/didikunz)\
**Post date:** [September 4, 2020, 8:14am UTC](https://casparcgforum.org/t/manipulating-4k-input/3460/12 "2020-09-04T08:14:10Z")

</div>

That is weird. Do you play the audio on the layer and take the audio from the output?

---

<div class="post-metadata">

**Author:** ![miha.markovic](https://casparcgforum.org/letter_avatar_proxy/v4/letter/m/c4cdca/32.png) [@miha.markovic](https://casparcgforum.org/u/miha.markovic)\
**Post date:** [September 4, 2020, 12:34pm UTC](https://casparcgforum.org/t/manipulating-4k-input/3460/13 "2020-09-04T12:34:31Z")

</div>

Sorry my mistake. Bed file on 4k playout. Everythink is ok now! Thank you!  
One more question  
I have 4K input and i want to zoom this input to HD resolution and move across 4k resloutiin with mixer transform and put it on HD output. For easy understanding is picture:  
 ![Capture](https://casparcgforum.org/uploads/default/original/2X/8/81251dc971f1de9d414d1f6946774d7d5df6c8b9.jpeg)

is this possible?

---

<div class="post-metadata">

**Author:** ![didikunz](https://casparcgforum.org/user_avatar/casparcgforum.org/didikunz/32/7_2.png) [@didikunz](https://casparcgforum.org/u/didikunz)\
**Post date:** [September 4, 2020, 5:02pm UTC](https://casparcgforum.org/t/manipulating-4k-input/3460/14 "2020-09-04T17:02:35Z")

</div>

Sure, dependent if you build your own control client for that see the wiki [here](https://github.com/CasparCG/help/wiki/AMCP-Protocol#mixer-fill) or check the mixer effects in the official client.

---

<div class="post-metadata">

**Author:** ![miha.markovic](https://casparcgforum.org/letter_avatar_proxy/v4/letter/m/c4cdca/32.png) [@miha.markovic](https://casparcgforum.org/u/miha.markovic)\
**Post date:** [September 4, 2020, 6:20pm UTC](https://casparcgforum.org/t/manipulating-4k-input/3460/15 "2020-09-04T18:20:33Z")

</div>

Thank you very much!

---

<div class="post-metadata">

**Author:** ![miha.markovic](https://casparcgforum.org/letter_avatar_proxy/v4/letter/m/c4cdca/32.png) [@miha.markovic](https://casparcgforum.org/u/miha.markovic)\
**Post date:** [December 29, 2020, 1:36pm UTC](https://casparcgforum.org/t/manipulating-4k-input/3460/16 "2020-12-29T13:36:52Z")

</div>

Hi, again,  
I have one problem with this. If i input 2160p25 or p30 everything is ok. If i input 2160p50 then from time to time output blinks (like refresh).

Any idea?

Thank you!

---

<div class="post-metadata">

**Author:** ![hreinnbeck](https://casparcgforum.org/user_avatar/casparcgforum.org/hreinnbeck/32/154_2.png) [@hreinnbeck](https://casparcgforum.org/u/hreinnbeck)\
**Post date:** [December 29, 2020, 1:43pm UTC](https://casparcgforum.org/t/manipulating-4k-input/3460/17 "2020-12-29T13:43:13Z")

</div>

Does only the decklink output blink (not screen consumer)? Does it blink if you play the file out to decklink with other software? Might be your cables can’t handle 2160p50.

Noticed you are talking about decklink in and out. That might be PCI bandwidth issues.

---

<div class="post-metadata">

**Author:** ![miha.markovic](https://casparcgforum.org/letter_avatar_proxy/v4/letter/m/c4cdca/32.png) [@miha.markovic](https://casparcgforum.org/u/miha.markovic)\
**Post date:** [December 29, 2020, 2:15pm UTC](https://casparcgforum.org/t/manipulating-4k-input/3460/18 "2020-12-29T14:15:53Z")

</div>

Hi,

Thank you for your answer.

It blinks on output and consumer screen. My input is camera and i play input in caspar clinet.  
If i log input in bm media express its ok, so i asume cable is ok.  
This is my configuation:  
RYZEN 9 3950X 4.7GHz  
KINGSTON 64GB 3000 DDR4  
SSD SAMSUNG 970 EVO PLUS 1TB M.2 PCIE  
BM DECKLINK EXTREME 4K 12G  
NVIDIA QUADRO P2200

I think computer is fine.

---

<div class="post-metadata">

**Author:** ![hreinnbeck](https://casparcgforum.org/user_avatar/casparcgforum.org/hreinnbeck/32/154_2.png) [@hreinnbeck](https://casparcgforum.org/u/hreinnbeck)\
**Post date:** [December 29, 2020, 2:25pm UTC](https://casparcgforum.org/t/manipulating-4k-input/3460/19 "2020-12-29T14:25:45Z")

</div>

Is your decklink in a x4, x8 or x16 slot?

---

<div class="post-metadata">

**Author:** ![miha.markovic](https://casparcgforum.org/letter_avatar_proxy/v4/letter/m/c4cdca/32.png) [@miha.markovic](https://casparcgforum.org/u/miha.markovic)\
**Post date:** [December 29, 2020, 2:47pm UTC](https://casparcgforum.org/t/manipulating-4k-input/3460/20 "2020-12-29T14:47:33Z")

</div>

its on X16, but i think its working in dual x8 because of graphic card.  
Do you think that can be a problem?

[Next page](https://casparcgforum.org/t/manipulating-4k-input/3460.md?page=2)