51 results about "DirectShow" patented technology

This invention applies to software components that interconnect, as in a frameworks, such that only components “certified” by some designated authority can participate, partly or wholly, in the intended operation of the application. The main emphasis is to limit the set of such software components to those that have been deemed to operate in some specific manner and / or in the scope of some specified set of constraints. The initial application for this invention is to prevent piracy of copyrighted data in multimedia frameworks such as Microsoft DirectShow, but the general invention has much wider applicability. Most authentication systems perform their actions prior to using the software component in question. This invention differs significantly in that it performs validation at runtime, rather than before the component is run. Thus, the validation is always at the most vulnerable point in a component's lifetime so far as counterfeiting is concerned.

The invention provides a profiled fiber computer automatic device and a method thereof. An automatic recognizing device comprises a computer of a recognizing system, a 3D automatic loading table, an optical microscope and a digital camera. The 3D automatic loading table and the computer of the recognizing system are connected by an R232 serial port to enable the computer recognizing system to control the accurate movement of the 3D automatic loading table by corresponding serial port commands to realize the automatic control of the platform. The digital camera is arranged on the optical microscope, and is connected with the computer by data wires, and the automatic control of the computer on image acquisition is realized by DirectShow. The automatic recognizing method comprises the following steps: step 1, an image acquiring fiber specimen is made; step 2, an original image is preprocessed; step 3, the fiber contour is extracted; step 4, images are spliced; step 5, fiber images are separated; step 6, fiber image characteristics are extracted; and step 7, a classifier of a supporting vector machine is used for classified recognition.

The invention discloses a real-time matting and video monitoring and collecting method which includes the following steps: acquiring the image of the shooting equipment; using a matting machine to acquire the foreground image of the image acquired by the shooting equipment; collecting and monitoring the high-resolution video at synchronous frequency through Directshow Smart Tee technology; and combining the foreground image acquired by the matting machine with the selected background image to produce a composite image. When a satisfactory composite image is acquired, a picture can be produced by print-screening the composite image acquired in the screen through screen capture technology.

The invention relates to a method for seamlessly using a cloud terminal local camera in a VDI (Virtual Device Interface) virtual desktop. An original DirectShow technical framework is improved, a virtual camera and a virtual player are constructed, the virtual camera transmits a data request to a redirection client through a redirection server, the redirection client operates terminal local real camera equipment to obtain image data of a frame, then the image data are compressed through a streaming media compression algorithm and then is transmitted back to the virtual camera and the image data are decompressed by the virtual camera and transmitted to the virtual player through a DirectShow framework; at the same time, the redirection client directly displays images at a screen coordinate position provided by the virtual player to complete the echoing of camera data. The method for seamlessly using the cloud terminal local camera in the VDI virtual desktop enables a user to log in the virtual desktop to seamlessly use the cloud terminal local camera and solves the problem that the echo data of the camera occupy network bandwidth when the camera is used.

The invention discloses a camera mapping method based on virtual equipment. The method comprises the steps that a virtual camera drive is created according to a Windows system WDM camera drive frame, and a virtual equipment bus drive is created according to a Windows system general drive frame; a camera operation plugin is created on a cloud terminal, and a client side communication module is created; the virtual equipment bus drive obtains physical information of a local camera through the client side communication module and the camera operation plugin, and meanwhile a virtual camera with the same physical information as the local camera is created; the Windows system automatically loads the virtual camera drive to the virtual camera, then the virtual camera can be in communication with Windows DirectShow middleware through the virtual camera drive, and communication between the virtual camera and the Windows application program is achieved. By means of the camera mapping method based on the virtual equipment, a user application program can operate the virtual camera as the local camera.

The invention relates to a system for processing camera video images. A real camera system includes a real camera, a first driving procedure module and a first DirectShow component. A virtual camera system includes a virtual camera imitated by a DSF framework, a second driving procedure module, and a second DirectShow component. A video processing module is arranged on an application layer and used for reading data from the first DirectShow component, processing the data and transmitting the data to the virtual camera. The invention also provides a method for processing the camera video images. The stability and flexibility of the system is enhanced by using the system and the method of the invention.

The invention provides a media module of a mobile video monitoring system. The media module is characterized in that: a DirectShow framework is employed as a framework of multimedia software development, a 'push' mode is employed as a data transmission mode, and an ffmpeg decoder is employed as an H.264 video decoder; and the DirectShow framework comprises the following parts: a source filter; a transform filter which is responsible for processing a video, decoding H.264 video data, and submitting the data to a filter of a next level; a rendering filter which is responsible for rendering play and audio play of the video on a panel, and submitting audio and video information after decoding to a video card or a sound card for processing; a filter graph manager which is responsible for managing the filters, providing a Filter management interface to an application program, and providing a reference clock; a Graph event providing module used for ensuring the media module to notify an event to the application program in a message form. The media module has good expansion performance, a development period is shortened, and development efficiency of the system is raised.

The invention relates to a real-time image scratching and video monitoring and collection system, which comprises image pick-up equipment, an image scratching machine, a server and a monitoring table, wherein the image pick-up equipment is used for obtaining shot images, the image scratching machine is connected with the image pick-up equipment and is used for obtaining perspective images of images obtained by the image pick-up equipment, the server is used for storing background images and is used for synchronously collecting and monitoring high-resolution videos by the Directshow SmartTee technology for sending the perspective images obtained by the image scratching machine and the selected background images to the monitoring table and synthesizing the images according to the instructions of the monitoring table, and the monitoring table is used for monitoring the perspective images and the background images and sending the image synthesis instructions to the server, and is used for generating photos on sectional drawings of the synthesized images obtained in a screen by the screen capture technology when the satisfactory synthesized images are obtained.

The invention provides a decrypting descrambling device for a ground wireless digital television receiving terminal, by which a terminal can receive and play encrypting scrambling programs. The technical proposal of the invention is as follows: the device comprise a condition receiving card read-write interface module providing the read-write of the condition receiving card, a digital signal receiving module demodulating modulated digital signals to encrypted scrambled digital television signals, a de-multiplexing module, an encrypting module, a descrambling module, a decoding module and a playing module, wherein the digital television signals are processed by a BDA frame on a driving layer to obtain the TS flow, and the de-multiplexing module de-multiplexes the TS flow to obtain the scrambling video-audio flow and the corresponding authorization information; the encrypting module receives the authorization information, based on which a control word is obtained from the condition receiving card; the descrambling module descrambles the scrambling video-audio flow according to the control word; the decoding module converts the descrambling video-audio flow to the playable video-audio flow according to the DirectShow frame on a software layer; and the playing module plays the video-audio flow. The invention is applied to the ground wireless digital television field.

The invention relates to multi-screen combined video playing technology based on a windows multi-screen system, which comprises: firstly, arranging a plurality of display cards on a computer, connecting each display card with a plurality of displays, displaying windows desktop extensions on the displays, and forming the multi-screen system; secondly, extracting data flow for operation transform before rendering a filter during the playing flow of a DirectShow architecture, and converting the data flow into bitmap flow based on RGB signals; and thirdly, canceling rendering of the filter, providing the bitmap flow after conversion to various displays, and realizing multi-screen combined playing. The multi-screen combined video playing technology based on the windows multi-screen system adopts the windows multi-screen system to convert video signals into the bitmap flow based on the RGB signals, provides the bitmap flow to the displays, realizes multi-screen combined display of monitoring pictures with low cost and less equipment technology, and can fully utilize resources and meet the special requirement of video monitoring.

The invention provides a multimedia file remote browsing method, comprising the following steps that: firstly, a file providence terminal acquires specified multimedia source files through virtual multimedia acquisition equipment; secondly, the file providence terminal plays acquired multimedia data for a remote terminal on the corresponding end through the multimedia chat function of instant communication IM software, wherein, the virtual multimedia acquisition equipment and the IM software are based on a DirectShow architecture. The method can realize preview of multimedia files such as audio, video and so on by utilization of the prior instant communication IM software without the necessity of additional resources such as a third-party server and so on. Moreover, the preview of the multimedia files can be realized as long as the software is the IM software supporting DirectShow, thereby the complex network connection protocol is avoided and the realization is simple, highly efficient, quick and convenient.

The invention relates to the fields of computers and communication technologies, particularly to a method for realizing remote desktop display and a device thereof. A desktop providing terminal acquires desktop video streams by a filling buffer function in a desktop acquisition module. An instant communication module sends the acquired desktop video streams to a remote terminal to realize the remote desktop display, wherein, both the desktop acquisition module and the instant communication module are based on a DirectShow architecture so as to solve the problem of inconvenient operation in the prior art.

The invention discloses an intelligent video monitoring system based on a DirectShow technology. The intelligent video monitoring system comprises a DirectShow component module, a video display set module, a motion object detection module and a data coding compression module, wherein the DirectShow component module is used for setting up an original video flow link, capturing an original video flow, and dividing the original video flow; the video display set module is used for setting an image display picture format, and returning the image display picture format to the DirectShow component module to display in real time; the motion object detection module is used for detecting a motion target in a monitoring area, transmitting image data including the motion target to the DirectShow component module to store the image data as a video file and give an alarm, and otherwise, automatically abandoning image data not including the motion target; and the data coding compression module is used for performing subsequent coding compression and storage of the video file stored by the DirectShow component module, and deleting the original video file. According to the intelligent video monitoring system disclosed by the invention, the technical problem that a video monitoring system, which is simple to develop and relatively high in accuracy, is lacking in engineering practices can be solved; and furthermore, the intelligent video monitoring system has the advantages of being low in cost, rapid in calculation speed and better in real-time performance.

The invention relates to a 2D and 3D software switching method based on DirectShow technology, comprising the following steps of: constructing 2D Filter and 3D Filter, establishing a link capable of playing back common video files by DirectShow technology in order to construct a complete broadcast link that is adaptive to the current display mode, processing content of each frame got through decoding a resource file before submitting an image to display according the display mode of a display device, submitting the generated data to the display device to display, and switching 2D and 3D in software corresponding to the switching in hardware. The method has the advantages that plane images or stereo images can be adjusted in real time in software according to the display mode, 2D and 3D can be switched quickly and in real time without being re-broadcast, and effects of 2D and 3D can be conveniently compared.

The present invention provides a multi-projector fusion method based on GPU real-time video processing, and a multi-projector fusion system based on GPU real-time video processing. According to the present invention, by designing and using an edge fusion and non-linear geometric correction parallel algorithm, and adopting a programming mode of CPU and GPU cooperative operation, the operation speed of the algorithm can be improved effectively, the consumption of the CPU resources is reduced, the dependence on the CPU calculation performance is reduced effectively. More space can be provided for the algorithm performance optimization while improving the hardware utilization rate and the calculation efficiency, so that the final projection and display effect is more natural and smooth. With the help of a DirectShow link model, the adaptive capacity of the system to a playing environment can be enhanced, the filters can be modified or added flexibly to complete the functions of the system, and users can adjust the non-linear geometric correction and edge fusion effects of the projective planes by modifying the parameters of the filters.

Some embodiments provide methods and systems for use in processing encrypted media content through a media processing stack, wherein the media processing stack comprises one or more ordered and successively arranged processing components. These embodiments receive the media content at each successive processing component and pass the media content to a successive processing component; optionally process the media content at each processing component; receive one or more decryption keys associated with the media content at one of the processing components; relay the decryption keys to one or more successive processing components to a decrypting one of the processing components that is capable of decrypting the media content, and decrypt the media content at the decrypting one of the processing components before passing the media content to the successive processing component.

The invention discloses a multimedia data out-of-process processing system which comprises a DirectShow component, a data export module and a data processing module; wherein, the DirectShow component is used for acquiring and outputting multimedia data, the data export module is used for exporting the multimedia data of the DirectShow component, and the data processing module is used for processing the multimedia data output by the data export module. The system of the invention can export the multimedia data of the DirectShow component to open source coded programs such as an ffmpeg coder, so as to develop multimedia applications; the system of the invention not only reduces the developing difficulty and developing cost, but also increases rich editing and expanding functions, therefore the development process of multimedia applications is more effective.

The invention provides a DirectShow-based moving object detection method, which comprises the following steps of firstly, based on a Gaussian mixture background modeling method, preprocessing a videoimage to obtain a background pixel model; based on a background difference method of OpenCV and a target tracking algorithm, solving through a video frame image and a background pixel model to obtaina moving target local image; and finally, acquiring the position parameters of the moving target based on a moving target positioning algorithm. The invention also provides a DirectShow-based moving object detection module and a monitoring system. According to the invention, 1) the data of a plurality of video images can be captured, converted and rendered at the same time, so that the utliziationrate and the video monitoring range of the monitoring system are improved; furthermore, by adopting a DirectShow-based moving target detection method, the video capture can be quickly and accuratelyrealized, the effectiveness of the monitoring system is accurately ensured, and the time is saved for data processing.

The invention discloses a method for converting DirectShow video data into high-performance Java image buffering. The process comprises the following steps of: inserting a frame capture filter into a DirectShow video stream, calculating the frame rate of the video stream, and setting and starting a timer; capturing video frame data, and performing format pixel level conversion on a video frame image; and establishing a Java graphics buffer, directly mapping the Java graphics buffer into a physical memory, and directly filling the converted video frame image data into the physical memory. By the method, the problem that Java cannot provide high-performance solutions for processing and playback of the video data for a long time is solved, conversion interaction between binary video data of system-level main stream multimedia frame DirectShow on Windows and the Java image buffering is realized, and stable and reliable multimedia video processing support is provided for Java.

The invention relates to a system and a comparison method, in particular to a system for comparing audio information and an audio information comparison method. The problem that at present, further manual verification can not be conducted on sample retrieving matching results is solved. A sample file format conversion operation module is used for converting one sample file in a sample library into the file with a wav format, a multimedia wav-format file play and control module is used for completing playing of the wav-format file through directshow and mutually controlling the playing process with a user, an audio sample retrieving comparison module is used for conducting position retrieving on targeted clips of audio and sample audio data through a sample retrieving method, the matching position and similarity are obtained, a comparison result processing and interface display module is used for conducting further processing on the matching results returned by the audio sample retrieving comparison module, and the matching results are displayed on an interface in a wave-shaped mode. The system for comparing the audio information and the audio information comparison method are used for comparing targeted audio files and sample files.

The invention relates to a high-definition video playing method based on a DirectShow. The method includes the following steps: encoding high-definition video data to form a video file in an H.264 / AVC stream format; constructing a streaming media playing link with the DirectShow; acquiring the video file by a source filter, and calling a splittertransform filter to split a video stream and an audio stream from the video file; decoding the video stream by a video decoder, to form video data in an uncompressed format and transmit the video data to a videorenderer filter, and decoding the audio stream by an audio decoder, to form audio data and transmit the audio data to an audiorenderer filter; and rendering, by the videorenderer filter, the video data in the uncompressed format to a graphics card to execute display processing, and rendering, by the audiorenderer filter, the audio data to a sound card to execute processing. According to the invention, it can be realized that the high-definition videos of 4K and the like are played smoothly, thus solving the problem that a device such as a personal computer can not play the high-definition videos of 4K and the like.

The invention relates to device and method for generating a DVD dynamic menu. The device comprises a media analysis module, a data source module, a Directshow player and a video generation module. The DVD dynamic menu generation device not only allows a user to select a picture as a menu background resource, but also allows the user to select a video as a menu background resource, wherein the video can be subjected to time shearing, and in addition, a self-made Slideshow video chip can be used as the menu background resource by the user; video animation clips of all chapters are shown in the menu so that the user can directly enjoy the video animations of all the chapters; photo frames in any shape are supported and play button resources are controlled, and the animation clips of all the chapters are shown in the menu according to resource shapes; and an editing function is realized in a player window, and the operation of previewing a play effect after editing in real time while editing is allowed.

The invention discloses a method for extracting audio and video data from multimedia. The method mainly includes: firstly, setting up a complete media rendering chain in a DirectShow manner; secondly, disconnecting a renderer at the tail end; thirdly, inserting a screener before the renderer at the tail end and recovering connection; fourthly, extracting audio and video data through the inserted screener; fifthly, subjecting the extracted data to distribution and processing; and sixthly, delivering the processed data to an application layer. Therefore, audio and video data can be obtained in the playing process. The method for extracting audio and video data from multimedia is supportive to extensive media formats and applicable to the field of audio and video application.

The invention relates to a video transmission system of a mobile phone and belongs to the technical field of mobile phone communication. The system comprises two smart mobile phones and a PC serving as a service terminal. The network connection among the mobile phones and the PC adopts a TCP / IP protocol; and the PC serving as a middle transcode server receives information of a transmitting terminal mobile phone, and transcodes and transmits the transcoded information to a receiving terminal mobile phone. When encoding at the transmitting terminal, the video transmission system adopts distributed video coding and transcodes through the middle transcode server; and the video transmission system performs simple MPEG or H.26x decoding at the receiving terminal. Both the two smart mobile phones are Windows Mobile operation systems; and the client adopts DirectShow technology as a basic frame tool for capturing, processing and playing back video stream. The video transmission system combines the advantages of the traditional video encoding and the distributed video coding and can simply encode and decode at an equipment terminal.

The invention provides an external subtitle redirection method based on DirectShow. The method includes the steps that step1, a subtitle file is obtained from a service side; step2, the subtitle file is transmitted to a client side; step3, a DirectVobSub Filter is loaded into a video playing link of the client side, and the directory path where the subtitle file is located is obtained through an interface of the DirectVobSub Filter; step4, the time stamp of each frame of video data in a video file of the client side is adjusted, and after subtitle data are added into the video data according to the time stamps, the adjusted video data are played through the video playing link of the client side. The invention further provides an external subtitle redirection system based on DirectShow. The problem that in a cloud computing environment, when a multimedia redirection technology is used for watching high-definition videos, external subtitles can not be loaded is solved.

The invention provides a video conference confidentiality method based on a chaotic encryption algorithm and belongs to the technical field of encryption. The method is mainly realized through the following steps: 1) construction of a P2P network structure having a customized CA mechanism; 2) audio and video collection / playback based on DirectShow; 3) realization of chaotic encryption / decryption Filters; and 4) realization of a chaotic encryption and decryption algorithm. By constructing the P2P network having the CA mechanism and developing an encryption layer using chaotic encryption and dynamic key mechanism, eavesdropping of conference content can be avoided effectively; implementation of scheme software proves that the chaotic encryption algorithm is practical and feasible; and underscheme design of overall encryption of a frame of AVI audio and video data stream, the fact that system audio and video can play smoothly can also prove that the chaotic encryption algorithm has speedadvantage in the encryption sequence generation and encryption process.

The invention provides a tea frying video monitoring system. The tea frying video monitoring system comprises a tea frying machine, a camera, a monitoring video stream network transmission module, a video stream processing module and an MFC user interaction interface. The invention discloses a tea frying video monitoring system. the tea frying condition in the tea frying machine is collected through the camera; collected information is collected through a monitoring video stream network transmission module; A Winsock technology is adopted to carry out network communication. DirectShow technology is adopted for designing a filter through a video stream processing module; A source filter, a conversion filter and a submitting filter are used for achieving the functions of storage, decoding and submitting of video stream data respectively, and finally the MPEG stream data recording the tea frying situation are played in a video monitoring system through an MFC user interaction interface.

The invention discloses a stable solution method for realizing multipath video input by a single PC. The stable solution method disclosed by the invention comprises the following steps: step 1, a main process of an application program creates a command line parameter for starting a capture process, wherein the contents of the command line parameter comprise a window handle of the main process for inter-process communication, an identification serial number of the capture process, and a camera serial number to be captured, and then starting the capture process through the command line parameter; step 2, analyzing the window handle of the main process for inter-process communication, the identification serial number of the capture process and the camera serial number to be captured from the command line parameter, and then calling a capture function provided by a DirectShow framework of the Windows to start the capture; and step 3, combining the captured data with the identification serial number of the capture process, sending the same to the window handle transmitted by the command line parameter through SendMessage, receiving the window handle by the main process and carrying out subsequent processing. According to the stable solution method disclosed by the invention, the multi-process technology is adopted to simplify the collection process and improve the compression stability.

The invention discloses a method for generating a BHD file based on DirectShow. The method comprises the following steps: receiving a request of generating the BHD file based on the DirectShow, resolving source file information from the request, creating a source file filter, and loading source file data; creating a BHD muxer filter, and making pins of the source file filter correspond to pins of the BHD muxer filter to form a link; acquiring media type parameters for linking from the link, and converting the media type parameters for linking into decoder information in a BHD format; transmitting audio and video data of the source file data to the BHD muxer filter through the link, and converting the audio and video data into media data in the BHD format; creating the BHD file according to the decoder information in the BHD format and the source file information; and acquiring the media data in the BHD format, and writing the acquired media data into a data area of the BHD file. Through adoption of the method, the BHD file can be generated on the basis of the DirectShow.

The invention discloses a method for generating a BHD file based on DirectShow. The method comprises the following steps: receiving a request of generating the BHD file based on the DirectShow, resolving source file information from the request, creating a source file filter, and loading source file data; creating a BHD muxer filter, and making pins of the source file filter correspond to pins of the BHD muxer filter to form a link; acquiring media type parameters for linking from the link, and converting the media type parameters for linking into decoder information in a BHD format; transmitting audio and video data of the source file data to the BHD muxer filter through the link, and converting the audio and video data into media data in the BHD format; creating the BHD file according to the decoder information in the BHD format and the source file information; and acquiring the media data in the BHD format, and writing the acquired media data into a data area of the BHD file. Through adoption of the method, the BHD file can be generated on the basis of the DirectShow.