ViewCast 240E, 450E manual Preview Pin to VMR7, Video Mixing Renderer

Page 78

AVStream Driver Reference Information

Preview Pin to VMR7

Figure 65. Video Mixing Renderer 7

VMR7 is short for Video Mixing Renderer 7. VMR7 is a newer renderer that is generally much faster than the old Video Renderer. When the driver is running in Direct Mode, VMR7 uses an efficient DirectDraw configuration to render with almost no CPU overhead, especially when YUY2 video is used. When the driver is running in PostProcessing Mode, DirectDraw is not used but it is still the fastest renderer.

Unfortunately, VMR7 is not the default video renderer in building a filtergraph – an application must explicitly ask for VMR7 in its graph for it to be used. This process causes many simpler applications to render video much less efficiently.

VMR7 works best with YUY2 video and there is usually little reason to use any other format. It will, however, work fairly well with the RGB format – usually RGB32 – that matches the current screen depth. We recommend letting DirectShow choose the video format. It generally makes the correct choice. In particular, on some (usually older) systems, if two video frames are to be rendered with VMR7 at the same time, only one can be YUY2; other(s) are RGB, with a conversion filter inserted into the graph if necessary.

We do not provide an RGB24 option on the preview pin for use with 24-bit screens because on at least some display adapters the rendering of RGB24 to VMR7 is incorrect.

Note: VMR7 cannot be used when closed captions are to be rendered from the driver’s DShow- standard CC or VBI pin – use the Overlay Mixer to Video Renderer pathway instead. If the driver’s internal rendering is used, the VMR7 works and is recommended.

72

ViewCast

Image 78
Contents Osprey 240e/450e User Guide Page Contents AVStream driver reference information Osprey 240e Environmental specifications Osprey 450e Page Warranties Limited WarrantyOverview Reseller Pass ThroughSystem requirements Minimum system requirementsInstallation Steps Installing the driverCustom installing AVStream Installing the video capture cardTo install the video capture card Digital Signature Not Found Window Setting Driver Properties Accessing the Osprey Config UtilityOspreyConfig’s initial processing sequence Initial OspreyConfig user interfaceSelecting a device for configuration Control used to open the properties Understanding the device properties window Osprey Video Device Properties window tabsVideo Decoder InputVideo Proc Amp RefSizeOspreyConfig utility to access devices Devices and global controlsInput tab Input tabVideo Present CancelVideo Input Video StandardOsprey 450e AV option hardware add-on-device Input tab without AV optionVideo input Osprey 450eVideo standard Video Standard fieldInput Format analog inputs Composite cameraVideoCheck VideoGraphVbiGraph VideoGraphVideo Proc Amp tab Video Proc Amp TabFrequency Anti Flicker Default Color EnablePowerLine BrightnessVideo Decoder tab Video Decoder tabLines detected Signal DetectedOutput Enable VCR InputHorizontal Horizontal DelayRefSize tab FormatHorizontal Format Square PixelsCCIR-601 Wide Horizontal DelaySignal WSS Use WideScreenSource Width Source WidthReference Size for Crop and Logo Placement Video Type Format HW or SW Adds CPU GranularityLine Ntsc Vertical Format Line Ntsc Vertical FormatSimulStream Currently UsingFilters tab DeinterlaceSimulStream SimulStream optionMultiple instances Osprey 240e/450e User Guide Inverse Telecine Adjust…Deinterlace Motion AdaptiveBackground − telecine and inverse telecine Currently Using group Current Using settingsAdaptive Deinterlace window Motion ThresholdFrame Algorithm Test Mode Restore DefaultsClose Osprey 240e/450e User Guide Device tab No-Video Test Pattern Buffers RequestedDiagnostic logging Diagnostic LoggingTypical section of data Device Info Board NumberingBoard Numbering Setting Driver Properties Closed Caption ExtrasTimecode Video Marking TimestampingCaptions tab Captions tabPin Select Render Ntsc Closed Captions On Video Render Logical White AsCC Pin CC PinLogo tab Enable Logo onFile and Color sub Tab Enable Key Color On File and Color Sub tabOsprey 240e/450e User Guide File and Color Pin SelectEnable Key Color Enable Key ColorWeighting Position and SizeOsprey 240e/450e User Guide Size and Crop tab Size and Crop tabReference Size Enable CroppingDefault Output Reference SizeGranularity Format Horizontal VerticalEnable Cropping Enable CroppingRecalc button Default Output Size Default Output SizePage AVStream driver reference information DirectShowAVStream Driver Reference Information Post-Processing mode Post-Processing modeAVStream Driver Reference Information Efficient Video Rendering Preview Pin to Video RendererPreview Pin to Overlay Mixer to Video Renderer Preview Pin to VMR7 Video Mixing RendererPreview Pin to VMR9 Some Data PointsAVStream Driver Reference Information Video standards and sizes Color formatsYUV format details Captioning via CC or VBI pins Closed captioning CCDirect CC rendering on video CC streaming interface Vertical Interval Timecode VitcVertical Blanking Interval VBI capture Timecode Video MarkingSelecting the audio source and input volume Audio driverAudio Driver Audio properties Audio propertiesAudio formats Audio configurationMono Source Mode Audio playbackDual Mono Audio level Input reference levelAppendix a Osprey hardware specifications Environmental specificationsOsprey 240e Osprey 240e long back plate Osprey 450e Osprey 450e back plateAppendix a Osprey Hardware Specifications Mini-DIN Signal RCA Connectors Appendix B Osprey 450e audio cablePage Appendix C Troubleshooting Color bars on video screenScrambled video image Poor video quality at large frame sizes Multiple horizontal lines across video imageCannot play back recorded audio Osprey 240e/450e User Guide Page Index Appendix C Troubleshooting Osprey 240e/450e User Guide Viewcast.com