ViewCast Osprey-240e, Osprey-450e User Manual

Osprey 240e/450e User Guide
Osprey® 240e/450e User Guide
AVStream Driver Version 4.5
Document Number: 40-03239-04-A
Date: December 2010
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© 2010 ViewCast Corporation. All rights reserved. Osprey® and SimulStream® are registered trademarks of ViewCast Corporation Microsoft®, Windows®, Windows Server ®2003, AVStream®,
DirectShow®, Intel® CoreDuo®, and Windows Media® Encoder are trademarks or registered trademarks of Microsoft Corporation. Any other product names, trademarks, trade names, service marks, or service names owned or registered by any other company and mentioned herein are the property of their respective companies.
No part of this specification may be reproduced, transcribed, transmitted or stored in a retrieval system in any part or by any means without the express written consent of ViewCast Corporation. ViewCast Corporation reserves the right to change any products herein at any time and without notice. ViewCast Corporation makes no representations or warranties regarding the content of this document, and assumes no responsibility for any errors contained herein.
UL Statement Underwriters Laboratories Inc. has not tested the performance or reliability of the security or signaling aspects of this product. UL has only
tested for fire, shock and casualty hazards as outlined in UL’s standard for safety UL 60950-1. UL certification does not cover the performance or reliability of the security or signaling aspects of this product. UL MAKES NO REPRESENTATIONS, WARRANTIES OR CERTIFICATIONS WHATSOEVER REGARDING THE PERFORMANCE OR RELIABILITY OF ANY SECURITY OR SIGNALING RELATED FUNCTIONS OF THIS PRODUCT.
To maintain UL compliance, this product to be used only with UL Listed computers that include instructions for user installed accessories.
FCC Notice:
WARNING: Use shielded cables to connect this device to peripherals in order to maintain compliance with FCC radio emission limits. WARNING: Modifications to this device not approved by ViewCast Corporation could void the authority granted to the user by the FCC to
operate the device. The Osprey 240e video capture card has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the
FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this device does cause harmful interference to radio or television reception the user is encouraged to try to correct the interference by one or more of the following measures:
Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the computer into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help. If the above measures are unsuccessful, please consult the dealer or manufacturer of your radio or television receiver, or speak with an
experienced radio/TV technician. Note: This reminder is provided to call to the CATV installer’s attention Section 820-40 of the NEC, which provides guidelines for proper
grounding and, in particular, specifies that the cable ground shall be connected to the grounding and, in particular, specifies that the cable ground shall be connected to the grounding system of the building, as close to the point of cable entry as practical.
The Osprey 450e video capture card has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case users will be required to correct the interference at their own expense.
Shielded Cables: Connections between this device and peripherals must be made using shielded cables in order to maintain compliance with FCC radio emission limits.
Modifications: Modifications to this device not approved by ViewCast Corporation could void the authority granted to the user by the FCC to operate the device.
Note to CATV Installer: Section 820-40 of the NEC provides guidelines for proper grounding and, in particular, specifies the cable ground shall be connected to the grounding system of the building, as close to the point of cable entry as practical.
Product Disposal Information
Dispose of this product in accordance with local and national disposal regulations (if any), including those governing the recovery and recycling of waste electrical and electronic equipment (WEEE).
RoHS Compliant: ViewCast Corporation is committed to compliance with the European directive on the Restriction of the Use of Certain
Hazardous Substances in Electrical and Electronic Equipment, Directive 2002/95/EC, the RoHS directive.
For current RoHS statement, visit www.viewcast.com. ViewCast Corporation 3701 W. Plano Parkway, Suite 300, Plano, TX 75075-7840 USA
Osprey 240e/450e User Guide
Contents
Overview ............................................................................................................................. 1
Warranties .......................................................................................................................... 1
System requirements .......................................................................................................... 2
Minimum system requirements ......................................................................................... 2
Installation Steps ............................................................................................................... 3
Installing the driver ............................................................................................................. 3
Custom installing AVStream ............................................................................................... 4
Installing the video capture card ........................................................................................ 4
Setting Driver Properties ................................................................................................... 7
OspreyConfig’s initial processing sequence ....................................................................... 8
Understanding the device properties window ................................................................. 11
Devices and global controls ........................................................................................ 13
Input tab ............................................................................................................................ 14
Osprey 450e AV option hardware add-on-device ...................................................... 16
Video standard group ................................................................................................. 17
Input Format group: analog inputs ............................................................................. 17
Video Proc Amp tab .......................................................................................................... 19
Video Decoder tab ............................................................................................................ 21
RefSize tab ......................................................................................................................... 23
Horizontal Format ....................................................................................................... 24
Horizontal Delay .......................................................................................................... 25
Source Width .............................................................................................................. 26
Reference Size for Crop and Logo Placement ............................................................. 27
525-Line (NTSC) Vertical Format ................................................................................. 27
Filters tab .......................................................................................................................... 29
SimulStream ................................................................................................................ 31
Deinterlace .................................................................................................................. 34
Currently Using group ................................................................................................. 35
Adaptive Deinterlace window ..................................................................................... 36
Device tab ......................................................................................................................... 38
No-Video Test Pattern ................................................................................................ 39
Buffers Requested ....................................................................................................... 39
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Contents
Diagnostic logging ....................................................................................................... 40
Extras ........................................................................................................................... 40
Device Info .................................................................................................................. 42
Captions tab ...................................................................................................................... 43
Pin Select ..................................................................................................................... 44
Render NTSC Closed Captions On Video ..................................................................... 45
Render Logical White As ............................................................................................. 45
CC Pin .......................................................................................................................... 46
Logo tab ............................................................................................................................ 47
Pin Select ..................................................................................................................... 49
File and Color .............................................................................................................. 49
Enable Key Color ......................................................................................................... 50
Weighting .................................................................................................................... 51
Position and Size ......................................................................................................... 51
Size and Crop tab .............................................................................................................. 53
Pin Select ..................................................................................................................... 54
Reference Size ............................................................................................................. 54
Granularity .................................................................................................................. 55
Enable Cropping .......................................................................................................... 56
Default Output Size ..................................................................................................... 58
AVStream driver reference information ...........................................................................59
Post-Processing mode ....................................................................................................... 61
Efficient Video Rendering ................................................................................................. 63
Preview Pin to Video Renderer ................................................................................... 63
Preview Pin to Overlay Mixer to Video Renderer ....................................................... 63
Preview Pin to VMR7 .................................................................................................. 64
Preview Pin to VMR9 .................................................................................................. 65
Some Data Points ........................................................................................................ 65
Video standards and sizes ................................................................................................. 67
Color formats .............................................................................................................. 67
YUV format details ...................................................................................................... 68
Closed captioning (CC) ................................................................................................ 69
Captioning via CC or VBI pins ...................................................................................... 69
Direct CC rendering on video ...................................................................................... 70
CC streaming interface ................................................................................................ 71
Vertical Interval Timecode (VITC) ............................................................................... 71
Vertical Blanking Interval (VBI) capture ...................................................................... 72
The audio driver ................................ ................................................................ ................73
Selecting the audio source and input volume .................................................................. 73
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Osprey 240e/450e User Guide
Audio properties page ...................................................................................................... 75
Audio formats ............................................................................................................. 76
Audio playback ............................................................................................................ 76
Audio configuration .................................................................................................... 76
Mono Source Mode .................................................................................................... 76
Audio level .................................................................................................................. 76
Appendix A: Osprey hardware specifications .................................................................79
Osprey 240e ...................................................................................................................... 79
Environmental specifications ...................................................................................... 79
Osprey 450e ...................................................................................................................... 81
Appendix B: Osprey 450e audio cable .............................................................................83
Appendix C: Troubleshooting ..........................................................................................85
Color bars on video screen ............................................................................................... 85
Scrambled video image ..................................................................................................... 85
Poor video quality at large frame sizes ............................................................................. 86
Multiple horizontal lines across video image ................................................................... 86
Cannot play back recorded audio ..................................................................................... 86
Audio recording control comes up with wrong device and wrong inputs ....................... 87
Index ..................................................................................................................................89
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Osprey 240e/450e User Guide
Limited Warranty
ViewCast warrants its hardware products against defects in material and workmanship under normal use for the period of one year (12 months) from date of sale. Where specific warranties exist that provide more substantial coverage, notwithstanding the warranty provisions herein, such product warranties control and preempt or supersede the warranty provisions herein.
Reseller Pass Through of Standard Limited Warranties.
Resellers pass the ViewCast standard limited warranties for the products through to the customer without modification. Any modification of a product voids the ViewCast warranties or any other existing or available warranty.
Overview
Thank you for purchasing the ViewCast Osprey 240e/450e video capture card. This user guide provides step-by-step instructions for installing and using your new video capture card. For the latest ViewCast product information and news, visit our website at www.viewcast.com.
Warranties
For complete warranty details, refer to the specific warranty included with each product. General warranty information includes the following:
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Overview
System requirements
The following system requirements relate to your Osprey® video capture card only. The video capture or encoding applications you use will likely require a much more powerful system than that which is listed below. Please consult your software documentation for applicable system requirements.
Minimum system requirements
Direct Mode: 2 GHz Intel® Pentium® 4 processor or equivalent PostProcessing Mode and SimulStream®: 2 GHz Intel® Pentium® 4 processor or equivalent, 3
GHz recommended
Microsoft® Windows® Professional or Home Edition, Windows Server® 2003 Up to 7.5 MB of available hard disk space 256 MB of RAM, 512 MB recommended One available PCI Express® slot
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Installation Steps
In all cases, use the setup.exe program on the product CD or in the web package if you downloaded it. The setup program automates the Plug and Play steps needed to install the drivers and ensures they are
performed correctly. It also installs the bundled applets and User’s Guide. If you have multiple Osprey
capture cards in the system it configures all of the boards at the same time.
We recommend this method especially if Osprey software does reside on your host computer. After the install is run, the software detects the card and its drivers initiate automatically.
If you are updating Osprey software, first uninstall the previous software version, reboot your computer, and then install the update.
Installing the driver
Insert the Osprey Software CD into your CD-Rom drive. The main menu for the Osprey software appears if you enable autoplay. If the main menu does not automatically appear, click on the Window’s computer icon and select the CD-Rom and the setup.exe icon. The Osprey A/VStream – Install Shield Wizard engages and guides you through the installation process.
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Installation Steps
Custom installing AVStream
During the installation process, if you choose a Custom installation, your options are limited (Figure 1).
Figure 1. Osprey 240e Custom Setup screen
This window allows you to choose individual components you may want to install. You can also change the location where components install.
Installing the video capture card
This manual covers one class of Osprey devices that include two PCI Express cards.
Class 6: o-240e, o-450e and related non-DSP PCI Express products
Both cards use the same driver. If you add a card from a different class then you need to install the driver for that card.
When you add or move boards after the AVStream 4.5 driver is already installed, there are two possibilities:
You add a board of a different class from what is already in the machine. For example, an
Osprey 240e is already in the machine with the current driver installed, and you want to add an Osprey 530. For this case, you have to obtain and install the driver install package for the new board.
You move a board from one slot to another, or if you add another board of the same type.
For example, you might have an Osprey 240e in the machine, and want to add another Osprey 240e. In this case, the following sequence begins:
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1.
Click Continue Anyway. We have tested our cards in thousands of PCs. The Controller installing window displays, and the text inside this window changes to
Osprey Video Capture Device, Installing ... Then the Digital Signature Not Found window appears on top of it.
2.
Click Continue Anyway. The Completing the Found New Hardware window displays.
3.
Click Finish. The Digital Signature Not Found window displays. This window displays once for each Osprey board you are installing. The Systems Setting
Change window displays.
4.
Click Finish and click Yes to restart the system now (Figure 3).
Figure 3. System Settings Change Window
To install the video capture card:
The New Hardware Wizard runs and the Found New Hardware window appears followed by the Digital Signature Not Found window (Figure 2)
Figure 2. Digital Signature Not Found Window
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Setting Driver Properties
After installing the Osprey card and AVStream driver, you need to access the cards settings and possibly modify them to fit your needs. This manual takes you step-by-step visually through the card settings. Start by opening the Osprey Config utility. Afterwards, we can explore the driver.
You need to use a DirectShow application such as Microsoft Windows Media® Encoder or RealProducer®. We also access card property pages through Osprey Config, the utility bundled with our
4.5 driver suite. Once installed you can see the card’s default settings and change them as needed.
To open Osprey Config click All Programs in the Start menu of your Windows computer, then click the ViewCast folder icon. Click Osprey 240e and 450e, then Utilities and the Osprey Config icon becomes visible (Figure 4).
Figure 4. Accessing the OspreyConfig Utility
Note: Other DirectShow applications can find the property page too. If you use a third-party
application, you will find how to access the card’s settings in the third-party applications documentation.
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Setting Driver Properties
OspreyConfig’s initial processing sequence
After clicking on the Osprey Config icon, the first screen of the application appears (Figure 5) showing the cards and devices installed on your computer.
Figure 5. Initial OspreyConfig user interface
In this example, the computer in use has one card and four devices. The card can take a single input and stream the content differently, for example, you can use several bit rates, sizes, and formats. Click the + icon on the left side of the device you wish to configure, to change the properties of that device.
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Figure 6 shows the user interface that appears when you select a filter. We expanded the Osprey 450e Device 1A and selected Video Filter. We’ll continue with this device unless we indicate otherwise.
Figure 6. Selecting a device for configuration
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Setting Driver Properties
When you choose Device1A and Video Filter 1, the Show Properties for Selected Filter button becomes active (Figure 7).
Figure 7. Control used to open the properties page
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Input
Select the video input, NTSC / PAL / SECAM video standard and Input Format
Video Proc Amp
Set brightness, contrast, saturation, hue, and sharpness
Video Decoder
Select the video standard – NTSC, PAL, SECAM
RefSize
Setting Horizontal format and delay, source width and so forth
Filters
SimulStream®, deinterlace, and inverse telecine*
Device
Test Pattern, Capture Buffers, Diagnostic Logging
Understanding the device properties window
Osprey’s device properties window enables you to view and change the default settings of the 4.5 driver. Once you are familiar with the video card’s properties, you can make changes to get the optimum performance from your card and change settings in real time.
Device properties are visible through tabs to select different controls (Figure 8). The 4.5 driver includes changes from previous versions - the tabs have changed. They now take advantage of the 4.5 driver’s advances and added functionality.
Figure 8. Osprey Video Device Properties window tabs
The Osprey 240e and Osprey 450e use the same driver. The same Video Device properties appear whether you choose the Osprey 240e or the Osprey 450e. If you have other Osprey cards, they can still coexist on your PC, but they use a separate version of the drivers provided with the card. You need the driver version for Video Capture cards you use.
The Osprey 240e and 450e cards have the following tabs:
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Setting Driver Properties
Captions
Set up on-video closed caption rendering
Logo
Set up on-video logos
Size and Crop
Set the default size, enable cropping, set the cropping rectangle
* Telecine refers to the technology used to transfer or repurpose analog film into electronic media.
Some of the 4.5 drivers’ controls work interactively and changes in value immediately update the video. Examples include brightness, contrast, hue, saturation, and sharpness.
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Devices and global controls
The Osprey 240e and Osprey 450e video capture cards can present multiple output streams from a single input device. For example, a company may wish to do a webcast globally to resellers, users, or potential customers. Using the Filters Tab, you can set up different output streams with different bit rates to accommodate users with different bandwidths.
Some changes may affect the filter, such as cropping, logos, and captions. For example, changes to the Osprey 450e Device 1A, Filter 2 only affect that filter (Figure 9).
Change the values on Video Proc Amp, Video Decoder, Input, Filters, Device, and/or RefSize tabs and the effect is global to the card. All characteristics on each device on the card change to those changed on a single device. This is limited to the card on which the device changed. If you make changes on an Osprey 240e card residing with an Osprey 450e card, a change on the Osprey 240e does not affect the Osprey 450e devices.
Figure 9. OspreyConfig utility to access devices
DirectShow® discussions refer to pins and filters. These terms require technical experience with Microsoft’s DirectX® 9 Software Developer’s Kit. References on tabs in the Osprey Driver relate to terms used by Microsoft’s streaming video software application. They exist for users with a high degree of technical expertise. You can simply ignore them and use the property tabs as discussed in this manual.
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Setting Driver Properties
Input tab
The source of data from an Osprey 240e/450e that streams to the Internet, can come from a number of devices such as DVD players, digital cameras, camcorders, and so forth.
Figure 10. Input tab
The controls on the Input tab of the driver properties card have a global effect on the Osprey capture card on which they reside. If you have multiple Osprey cards, and you want to make global changes, you have to make the change on each card.
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Video Input
The Video Input section of the tab allows you to select the video input type coming from your source video.
Video Present
This indicator is enabled when video is present.
Video Standard
The Video Standard allows you to select the standard different countries or geographical areas use (Figure 10) from the drop­down list. The North American standard is NTSC. The Japanese standard is NTSC-Japan. The five PAL standards, B, D, G, H, and I are similar and treated the same way by the Osprey driver. The driver also supports PAL-M and N and SECAM video.
Input Format
This control works with digital cameras routing through the Osprey’s card’s analog input.
OK
Click OK to accept the settings.
Cancel
Click Cancel to reject the settings and close the window.
Apply
Click Apply to apply the settings.
Help
Click Help to access the user guide.
The Input tab has the following controls.
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Setting Driver Properties
Osprey 450e AV option hardware add-on-device
In addition to the standard components built into the Osprey 450e card, you can purchase the Osprey 450e AV Option hardware add-on device.
The AV Option exposes additional inputs for Component and S-Video as well as balanced audio. For example, when you choose a Filter from standard Osprey 450e Device 1A; the default option provides a single video capability: Composite.
Figure 11. Input Tab without AV option
Without the AV hardware option the default input standard is limited to Composite. With the optional add-on, you also have Composite 1,2,3,4, S-Video and Component YRYBY (Figure 11 and Figure 12).
Note: Separate video, abbreviated S-Video (also known as Y/C) is an analog video signal that
carries the video data as two separate signals. They include luma (~brightness) and chroma (~color).
Figure 12. Osprey 450e card with optional plug-in
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Video standard group
Figure 13. Video Standard field
Osprey cards can capture country centric data, which can be streamed to the Internet by an encoding application. The Video Standard allows you to select a standard used in specific countries or geographical areas. The Osprey driver has the ability to stream in a number of formats unique to countries and, or geographic locations. You can change the format on the Osprey card by simply clicking on the format from the Video Standard drop-down list.
The North American standard is NTSC. The Japanese standard is NTSC-Japan. The five PAL standards, B, D, G, H, and I are similar, and are treated the same way by the Osprey driver. The driver also supports PAL-M and N and SECAM video.
The Lines / Hz field changes to match the selected video standard, regardless of what video standard is actually connected to the input.
Figure 14. Video Standard drop-down list
Input Format group: analog inputs
Below the Video Standard drop-down list are two checkboxes for Input Format (Figure 15).
Figure 15. Input Format
On the Osprey 240e/450e, when an analog input becomes the media source, the controls provide adjustments that improve the clarity of video from monochrome sources. When a composite input line is selected and a monochrome device is attached, the result is a sharper image, as shown in the notch kill item in Figure 16. This control is only for true monochrome devices, without color capability.
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Setting Driver Properties
B&W composite camera
Figure 16. Notch Kill
Black and white input sources are rare these days, but some do exist. For example, you may want to stream black and white historical film in a documentary film.
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Video Proc Amp tab
Video Proc Amp stands for Video Process Amplifier. It controls various characteristics of streaming output from Osprey 240e/450e cards. The Video Proc Amp is the second tab from the left of the Device 1A properties (Figure 17).
Figure 17. VideoProc Amp Tab
The Video Proc Amp uses slider controls to adjust brightness, contrast, hue, saturation, sharpness, and gamma. If you’re using the preview or capture mode in real-time, then you can see your adjustments as you make them with the Video Proc Amp controls.
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Setting Driver Properties
Brightness and Contrast
These are terms for what one would call a contrast ratio. It’s a measure of a display
system, defined as the ratio of the brightest color (white) to that of the darkest color (black) that the system is capable of producing. A high contrast ratio is a desired aspect of any display, but with the various methods of measurement for a system or its part, different measured values can sometimes produce similar results. The control exists in the event you need to change the ratio of an incoming signal.
Hue
Hue adjustment only functions for NTSC video. It sets the predominance of color, classed as red, yellow, green, blue or an intermediate color based on a contiguous pair of these colors
Saturation
In color theory, saturation or purity refers to the intensity of a specific hue. A highly saturated hue has a vivid, intense color, while a less saturated hue appears more muted and grey. With no saturation at all, the hue becomes a shade of grey. You are able to adjust the saturation level in the event it is altered by a video feed.
Sharpness
This slider has eight positions corresponding to eight hardware filter settings. Generally, the positions to the left result in smoother video, the positions to the right result in sharper video. Since each step engages a different combination of discrete filters, some steps may result in slight differences while other steps may result in large differences. The range is 0 to 7.
Gamma
You would rarely use this control; however, a need may arise for its use. In the simplest terms the input of a feed from a device into your card may not match the digital output on your screen. The gamma control allows you to balance the red, blue and green from the input to output within the normal range of people’s perceptions.
White Balance
This field is an unused DirectShow feature and is not selectable.
Backlight Comp
This field is an unused DirectShow feature and is not selectable.
Gain
This field is an unused DirectShow feature and is not selectable.
Color Enable
This field is an unused DirectShow feature and is not selectable.
PowerLine Frequency (Anti Flicker)
This field is an unused DirectShow feature and is not selectable.
Default
Click Default to return to the default settings.
Auto
This field is an unused DirectShow feature and is not selectable.
OK
Click OK to accept the settings.
Cancel
Click Cancel to close the window.
Apply
Click Apply to apply the settings.
Help
Click Help to access the user guide.
The Video Proc Amp tab has the following controls.
For all of the Video Proc Amp controls the driver maintains one setting per Osprey device. It does not maintain individual settings for each input or type of input.
When you change the video standard or input you will not see changes in the slider controls – such as the Hue button becoming disabled – until the driver properties dialog is closed and re-entered.
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Video Decoder tab
The Video Decoder tab is a Microsoft DirectShow standard control for setting the NTSC/PAL/SECAM video standards (Figure 18). We discussed NTSC while discussing the Input tab. PAL and SECAM are standards used in Europe and other parts of the world. Your Osprey cards can function in computers in various countries with different standards.
Figure 18. Video Decoder tab
Changes apply to all video previews and stream captures on the currently selected device. If you have multiple Osprey cards, you can set the input individually for each of them. Changes made with this control take effect immediately. If video is running and a standard is selected that does not match the incoming signal, the video is likely to freeze or glitch until the signal matches the correct standard.
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Setting Driver Properties
Video Standard
Select the video standard
Signal Detected
When the card does not detect the input signal, this field displays a 0. When the card detects the input signal, it displays 1.
Lines detected
This field displays the number of lines the card detects in the input signal.
VCR Input
This field is a DirectShow feature that is not implemented.
Output Enable
This field is a DirectShow feature that is not implemented.
OK
Click OK to accept the settings.
Cancel
Click Cancel to reject the settings and close the window.
Apply
Click Apply to apply the settings.
Help
Click Help to access the user guide.
The Video Decoder tab has the following controls.
The driver treats PAL-BDGHI identically (the exceptions with PAL are PAL-M and PAL-N which are their own beings) and the driver also treats all variations of SECAM the same.
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Horizontal Format
Set the horizontal mode for the output. Options include Square Pixels, CCIR-601 setting, 16:9 Wide, and Use WideScreen Signal control.
Horizontal Delay
The horizontal delay control moves the video horizontally in the capture or preview frame.
Source Width
The Source Width control can be used to trim the black left and right edges of an image.
Reference Size for Crop and Logo Placement
This part of the dialog box displays the results of more fundamental settings made elsewhere in the dialog box.
525-Line (NTSC) Vertical Format
This control is for NTSC users. It has no effect for PAL and SECAM 625-line video standards.
OK
Click OK to accept the settings.
RefSize tab
Changes made to the RefSize tab (Figure 19) apply to all video previews and captures on the currently selected device. The RefSize tab controls the features related to the reference size, format, and proportions of the video. Most users can set up this page once and only refer to it occasionally since this page does not provide everyday control for the final output size of your video. You’ll likely control final output size from your application, the Size and Crop tab, or from the Pin Properties dialog described in the next section.
Figure 19. RefSize tab
The RefSize tab has the following controls.
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Setting Driver Properties
Cancel
Click Cancel to reject the settings and close the window.
Apply
Click Apply to apply the settings.
Help
Click Help to access the user guide.
Square Pixels
Use the Square Pixels setting for normal 4:3 video (Figure 20) that is viewed via a computer monitor. This setting results in a square aspect ratio sampling of the source video. This results in a source image of 640 x 480 for 525-line standards and 768 x 576 for 625-line standards.
CCIR-601
Use the CCIR-601 setting for 4:3 video that is viewed on a dedicated video monitor. This setting results in a CCIR-601 aspect ratio sampling of the source video. It results in a video input horizontal size of 720 pixels for both 525-line and 625-line standards. This sizing is standard for dedicated monitors but the resulting video appears horizontally stretched (525-line) or squeezed (625-line) on a computer monitor.
It is more efficient to set the horizontal mode to match the size of the output. For example, if your target video size is 640 x 480 using Square Pixel sizing in PostProcessing Mode, it will avoid an unnecessary software scaling step in the driver.
On some systems, for reasons external to this driver, 640 x 480 video renders on screen a lot faster than 720 x 480 video – that is, the speed difference is a lot more than the 9:8 ratio of numbers of pixels.
16:9 Wide
Select 16:9 Wide for 1.85:1 anamorphic video such as DVD content and any widescreen content. The output video size is 852 x 480 for 525-line standards, and 1024 x 576 for 625-line standards. To actually see output of this size, you have to also select this size in your application.
Use WideScreen Signal (WSS)
The Use WideScreen Signal (WSS) control enables automatic sidebars and letterboxing when the input video aspect ratio does not match the output aspect ratio. If the aspect ratio of your content is subject to change between 16:9 and 4:3, it is useful to enable this control.
Horizontal Format
Figure 20. Horizontal Format
The Horizontal Format has the following controls.
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