GoMax Electronics CAP-50CI User manual

CAP-50CI
USB-C 4K Video Capture Box with Scaler
User Manual
rev: 210118
Made in Taiwan
TABLE OF CONTENTS
INTRODUCTION.....................................................................................................................1
FEATURES.............................................................................................................................1
PACKAGE CONTENTS..........................................................................................................1
SPECIFICATIONS..................................................................................................................2
PANEL DESCRIPTIONS.........................................................................................................3
CONNECTION DIAGRAM.......................................................................................................3
VIDEO STREAMING...............................................................................................................4
TROUBLESHOOTING..........................................................................................................12
USB PIN DEFINITION...........................................................................................................13
WARRANTY .........................................................................................................................14

-1-
INTRODUCTION
The CAP-50CI USB-C 4K Video Capture Box with Scaler provides a professional way to capture
HDMI video signals. It adopts USB 3.1 Type-C Gen 1 (USB 3.0) interface, which can realize high-speed
transmission. Users can capture Ultra HD(4K2K@30) video by this capture device. Besides, CAP-50CI
can capture and display original uncompressed HDMI video with more realistic color rendition.
CAP-50CI also uses large volume image buffer technology which effectively avoids the video tearing.
The high sampling rate and high sampling accuracy assure images with high sharpness, rich details,
and less color edges.
FEATURES
HDMI video and audio streams over USB 3.1 Type-C Gen 1
Supports UVC1.0/1.1/1.5
Supports video resolution up to 4K2K@30
Supports deinterlace & scaler*
Auto-detection on video format to ensure plug-play operations
Recording Video Format: Software Compression
Works on multiple operating system platforms (Windows 7/8.1/10, Mac and Linux OS)
Compatible with most 3rd party software such as OBS Studio and AMCap
Supports USB 3.1 Gen 1 (RGB/YUY2/NV12) (capture up to 4K2K@30) and USB 2.0 (YUY2/NV12)
(capture up to 720P@30)
Low Latency (3~4ms at 1080P)
USB-C reversible
System Requirements (Recommanded)
- Windows® 7(SP1) / Windows 8.1 / Windows 10
- PC: Intel® CoreTM i5-4440 3.10GHz + NVIDIA® GeForce® GTX 660 or higher
- Laptop: Intel® Core i7-4810MQ + NVIDIA GeForce GTX 870M or higher
- 4GB RAM or higher
PACKAGE CONTENTS
1x CAP-50CI
1x USB 3.0 A to C Cable (host to device)
1x User Manual
1. Video quality is apparently related to the capability of computer and software setting.
2. Please use the included USB 3.0 cable in the box to protect the device and avoid further
compatible issues.
3. Video resolution change may require to restart software.
!
* Scale-up supports up to 1080P@60
!
-2-
SPECIFICATIONS
Model Name
CAP-50CI
Technical
Role of usage
Video Capture Device
Input Video bandwidth
297MHz
Output bandwidth
Up to 350Mbps (USB-C)
Video support(USB-C)
Up to 4K2K@30
Audio Input
HDMI Embedded Audio
Audio Format
2CH 16bit PCM
Recording Mode
Software Compression
Recording Video Format
RGB/YUY2/NV12 (USB3.1 Gen 1), YUY2/NV12 (USB2.0)
ESD protection
Human body model —±15kV [air-gap discharge] &
±8kV [contact discharge]
PCB stack-up
4-layer board [impedance control —differential 100Ω; single 50Ω]
Firmware update
Feasible via USB-C Port
Input
1x HDMI
Output
1x USB-C
HDMI connector
Type A [19-pin female]
USB connector
USB 3.1 Type C (SuperSpeed USB)
Software compatibility
(not complete list)
OBS Studio (Windows, Linux, MAC), AMCap (Windows), Potplayer
(Windows)¸ VLC (OS X, Linux), XSplit Boardcast (Windows), Skype
(Windows, OS X), Zoom (Windows), Hangout (Windows), TeamViewer
(Windows)
OS Support
Windows 7 /8.1 /10, Mac and Linux OS
Mechanical
Housing
Metal enclosure
Dimensions
[L x W x H]
Model
77 x 38 x 19mm [3" x 1.5" x 0.7"]
Package
165 x 111 x 42mm [6.4" x 4.4" x 1.7"]
Carton
490 x 426 x 352mm [1'6" x 1'4" x 13.8"]
Weight
Model
58g[2 oz]
Package
142 g[5 oz]
Power supply
Via USB-C
Power consumption
3 Watts [max]
Operation temperature
0~40°C [32~104°F]
Storage temperature
-20~60°C [-4~140°F]
Relative humidity
20~90% RH [no condensation]

-3-
PANEL DESCRIPTIONS
1. USB-C OUT: Connect to a USB host (PC, NB, MAC…)
2. LED INDICATOR: Power & input signal indicator LED
[Blue] Device power on
[Green] Input detects HDMI signal
[Red]* Input source is HDCP protected
3. HDMI IN: Connect to a HDMI source
CONNECTION DIAGRAM
*When the input source is HDCP protected, LED will become red to indicate the content is
legally encrypted and can NOT be captured.
!
-4-
VIDEO STREAMING
Create a Video Streaming
Users can create video streams on the streaming service platform. The below steps show how to complete the
video streaming settings from Twitch and YouTube.
Twitch
1. Browse the Twitch website (https://www.twitch.tv/) and log in, then select "Creator Dashboard" from your
account drop-down menu at the top right of the screen.
2. Find "Preferences" in the left menu, and click "Channel", then you will see "Primary Steam key" on the
screen. Copy the "Primary Steam key" and paste it into the "Stream Key" field in the OBS, then click "Start
Streaming" in the software.
*Please refer to steps 4-6 of the OBS software control program.

-5-
3. Go back to Twitch and select "Channel" from your account drop-down menu.
4. At this point, you will see the player start live streaming.
-6-
YouTube
1. Browse the YouTube website (https://www.youtube.com/) and log in, then lick "Go live" from the "Create"
icon menu at the top right of the screen.
* If your account is using YouTube for the first time to create a video stream, you need to wait 24 hours to
enable the function.
2. Click "Stream" in the left menu, and fill in the relevant information of the live video to create a new stream.

-7-
3. You will see "Stream key" from the “STREAM SETTINGS” below. Copy the "Stream key" and paste it into the
"Stream Key" field in the OBS, then click "Start Streaming" in the software.
*Please refer to steps 4-6 of the OBS software control program.
4. Next, go back to YouTube, and then wait for 30-60 seconds, the player will display the live preview. At the
same time, the "GO LIVE" button at the top right will turn blue, please press this button.
5. The player on YouTube will start live streaming.
-8-
Stream and record videos with OBS
OBS is popular USB capture freeware and has excellent compatibility. Please start with OBS if users are not
familiar with USB capture device.
Download the software
Browse the download page of the OBS official website (https://obsproject.com/download), then select the
suitable computer operating system and start downloading.
Start the software control program
After downloading the software, please open it and follow the below steps to complete the video streaming
settings.
Step1
Step2-3
Step4-7

-9-
1. First, find the "Scenes" window, click "+" in the lower left corner, and then enter the name of the scene to
create a new scene.
2. Find the "Source" window, click "+" in the lower left corner, and then select "Display Capture" or "Video
Capture Device" to create a new source.
3. Next, you can set display capture properties. If you select "Display Capture" in step 2, you can select the
primary monitor or other extended monitor as the display source. If you select "Video Capture Device" in
step 2, you can select USB video device as the display source. After all settings are completed, click “OK”.
-10-
4. Click "Settings" and then select "Stream" to perform streaming settings. Users can choose service
providers, including Twitch, YouTube, etc.
5. Paste the stream key provided by the service provider into the "Stream Key" field, then click "Apply" and
"OK" after setting. In addition, users can lick "Get Stream Key" at this step to open the service provider
website.
6. Please click "Start Streaming". At this time, the screen after clicking "Start Streaming" will be displayed in
the live video.

-11-
7. On the other hand, users can also click "Start Recording" to record videos with OBS. Besides, you can click
"Settings" and then select "Output" to set “Recording Path” and “Recording Format”.
The procedures the manual demonstrates are based on the interface that each website
provides at the time when the manual is written. The most recent way to make live
streaming happen is supposed to be very likely as the above procedures but subject to
change by the website interface update from the social media.
!
-12-
TROUBLESHOOTING
Our USB device has done comprehensive tests before shipment. Most of the incompatibilities we
have experienced are not from the USB capture device itself, but from the sophisticated software and
hardware combination of PC or laptop. Please follow the following suggestions to see any helps.
1. OBS is popular USB capture freeware and has excellent compatibility. Please download it and
start with OBS if users are not familiar with USB capture device.
https://obsproject.com/download
2. The USB device supports HDCP mechanism to protect legal content from pirates. If any HDMI
input with HDCP protection, the built-in LED will become red to indicate HDCP existence. No
capture will be legally allowed if HDCP is detected. Please use non-HDCP protected HDMI
sources or disable HDCP in order to get USB device work. Device like PS4 supports such a feature
to turn HDCP off.
3. Due to the complexities of OS and computer hardware, different USB ports on PC or laptop may
have different performance or limitation. Please try all USB ports to see if there are any
differences.
4. Please must use the USB cable in box. We do not guarantee the overall performance when the
USB capture box works with some other USB cables.
5. HDMI cable quality may also play an essential role when capturing. Please be sure of that HDMI
cable can do 1080P@60 HDMI signal transmission or better. Try different cables when the device
is not able to work as expected.

-13-
USB PIN DEFINITION
P1
P2
VBUS
A4, B4, A9, B9
1
VBUS
Dn1
A7
2
D-
Dp1
A6
3
D+
GND
A1, B1, A12, B12
4
GND
SSTxn1
A3
5
SSRX-
SSTxp1
A2
6
SSRX+
GND
A1, B1, A12, B12
7
GND
SSRxn1
B10
8
SSTX-
SSRxp1
B11
9
SSTX+
-14-
WARRANTY
The SELLER warrants the CAP-50CI USB-C 4K Video Capture Box with Scaler to be free from
defects in the material and workmanship for 1 year from the date of purchase from the SELLER or an
authorized dealer. Should this product fail to be in good working order within 1 year warranty period,
The SELLER, at its option, repair or replace the unit, provided that the unit has not been subjected to
accident, disaster, abuse or any unauthorized modifications including static discharge and power
surges.
Unit that fails under conditions other than those covered will be repaired at the current price of
parts and labor in effect at the time of repair. Such repairs are warranted for 90 days from the day of
reshipment to the BUYER. If the unit is delivered by mail, customers agree to insure the unit or assume
the risk of loss or damage in transit. Under no circumstances will a unit be accepted without a return
authorization number.
The warranty is in lieu of all other warranties expressed or implied, including without limitations,
any other implied warranty or fitness or merchantability for any particular purpose, all of which are
expressly disclaimed.
Proof of sale may be required in order to claim warranty. Customers outside Taiwan are
responsible for shipping charges to and from the SELLER. Cables are limited to a 30 day warranty and
cable must be free from any markings, scratches, and neatly coiled.
The content of this manual has been carefully checked and is believed to be accurate. However,
The SELLER assumes no responsibility for any inaccuracies that may be contained in this manual. The
SELLER will NOT be liable for direct, indirect, incidental, special, or consequential damages resulting
from any defect or omission in this manual, even if advised of the possibility of such damages. Also,
the technical information contained herein regarding the CAP-50CI features and specifications is
subject to change without further notice.