Founded in 1954, Capital Normal University is a comprehensive teacher-training college with multiple majors. It is a key university in Beijing that has been invested in construction and entered the "211 Project". Since its establishment 54 years ago, it has cultivated nearly 100,000 senior professionals of various types. It is an important base for delivering qualified teachers for Beijing's basic education and cultivating other talents needed for modernization.
Capital Normal University uses its own advantages to build a characteristic science and technology park: First, relying on the resources of the liberal arts and arts departments to build an industry incubation center featuring "cultural creativity"; second, based on educational disciplines, introducing innovative and practical Educational technology projects promote the development of the educational undertakings in the capital. Among them, the film and television production center of the Science and Technology Park of Capital Normal University has built an advanced platform for film and television production in order to bring better services to the enterprises in the park and give full play to the role of industry incubation center.
case study
At present, TV production technology has experienced two major developments from analog TV to digital TV, from standard definition TV to high-definition TV. And with the development of IT technology, the gradual integration of video technology and computer technology has brought unprecedented new development to TV program production. The arrival of high-definition television has greatly improved the picture quality of TV programs, and at the same time, it has brought higher requirements for video production technology.
In order to meet the needs of this TV program production, and in line with the goal of building an advanced film and television production platform for the film and television production center of the Capital Normal University Science and Technology Park, Synchronous Technology established HD for it after understanding the business needs of the Capital Normal University Science and Technology Park Edit the network. The high-definition network uses the current advanced IP-SAN network architecture to support high / standard definition production network requirements. In order to meet the needs of a large number of video and audio storage, the system is equipped with a disk array device with a large storage capacity. The network also uses the OpenNet general video network management system to scientifically and effectively manage the personnel, equipment, network storage and network materials of the network, and provides a larger space and guarantee for the future expansion and upgrade of the system. The system has good scalability Effectively protected the network investment of the Capital Normal University Science Park.
Open network, strong compatibility
At present, there are many types of video editing software. There are many excellent editing software at home and abroad. Facing the development and application requirements of film and television production in the Science and Technology Park, compatibility with a variety of non-editing and hardware can greatly improve the compatibility and openness of the system. The OpenNet system solves this problem. As long as the non-linear editing software uses standard files to read and write materials and programs, no matter which manufacturer's hardware or pure software editing software it uses, it can be embedded in the OpenNet system to make it available Network function, participate in network application.
In the high-definition non-editing network of the Film and Television Production Center of the Science and Technology Park, the source of materials is relatively wide, and the video and audio formats may be diverse. OpenNet general video network management system can support multiple video and audio file formats, such as uncompressed video, DVCAM 25/50, DVPro 25/50, MPEG1, MPEG2, MPEG4 ...
The OpenNet system has an open network architecture and can fully support various network architectures. It supports single-network structure and dual-network structure in a centralized storage network environment, and supports Fibre Channel (FC) networks and 100M / Gigabit Ethernet. As well as SCSI or iSCSI networks, IP-SAN networking is used in this solution. The system also supports high-standard-definition network stream, there are no restrictions on the network stream, the system upgrade is easy.
Material management
The users of the non-editing network of the film and television production center of the Science and Technology Park are not very fixed. With the replacement of personnel, if the materials are not managed, there will be a large accumulation of materials, more and more storage space is occupied, and materials are cluttered Issues such as accidental deletion and duplication of names cause the material to be extremely insecure. The OpenNet system provides excellent solutions to these problems through "shadow files"-virtual mapping technology and scientific and reasonable material management.
1) Efficient use of storage resources
Due to the use of "shadow file"-virtual mapping technology, the material used by each production staff is the shadow of the original physical file, and the original physical material is stored in a relatively safe space, the "shadow file" has a All the attributes of real files, but shadow files only occupy a few KB of storage space, which greatly saves the local space of the editing site and maximizes the utilization rate of network storage space. And the material can be set in the collection, submission, import, modification and other links to set the survival period, the expired material system can be automatically deleted.
2) Convenient material sharing
The OpenNet system uses virtual mapping technology to provide convenient sharing of materials for the entire non-production network, so that the same material can be used by multiple people at the same time, and each user can arbitrarily change the name of the material without affecting each other. When multiple people want to share a material, they can share it by submitting a "shadow file". Because the "shadow file" occupies less space, the submission process can be completed in an instant, saving transmission time and improving Program production efficiency.
3) Material security
Because there is only one copy of the original physical material in the network storage in the OpenNet system, and the user cannot directly access the material, the safety of the material is greatly guaranteed. Not only that, in order to provide the opportunity to regret the deleted material, the deleted material can be re-mapped back through the "shadow file" technology adopted by the system, and the user cannot directly delete the real physical material.
4) Material science management
In the system, the logged-in personnel can only see the materials within their own authority. The system material can be divided into four levels according to the needs of users. For example, in the use of schools, it can be divided into four levels of materials: college, department, class, and student for management.
In addition to the hierarchical management of materials, the system adopts a unique method for the materials with the same name in the system so that the renamed materials will not cover the original materials. Both materials can be better distinguished and stored in the system.
Personnel management
In addition to meeting the needs of the editing business, the non-editing network of the film and television production center is very important for the management of the user. If you do not manage the network users, it will bring a series of troublesome problems, such as storing materials at will, deleting other people's materials at will, and modifying system settings at will, which will bring difficulties to the future use and maintenance of the non-edited network.
The OpenNet general video network management system is aimed at such problems and provides powerful personnel management for the editing network. The system uses a strict account authentication mechanism to manage the people who use the network. Each person in the network can establish a corresponding account. Before starting any application module in the system, you must log in with an account, only if you have the appropriate permissions. This application software can start normally. And only by logging in can you use non-editing software and materials in the system. After logging in, each account can only see and use his own material and the public material of the higher level that is logged in. Materials outside this range are not visible.
In this system, each account can be set with corresponding permissions. For an account, it is possible to set its permission to use a certain system module, and at the same time, it can also restrict its use of certain modules under the module. Features. For example, you can set a normal account to have the upload function permission, and at the same time set up a function that can only upload materials for the login account itself, then the account can only upload materials for its own account after logging in the uploaded module, but not for the column and Upload on the level above it. Such meticulous division better realizes the authority management of all personnel under the network system.
Network storage management
1) Storage space allocation
The materials used for non-linear editing in the network and the produced engineering files are usually stored on the disk array. No matter how large the disk array, the storage space is limited. How to scientifically and rationally allocate the limited space and effectively apply the standard Is very important. In the OpenNet system, the size of storage space that can be controlled by different material division levels is different. The administrator allocates in advance according to the actual situation. In order to upload materials beyond the allowed storage space, importing materials is not allowed.
2) Time / space management mode
The system adopts two management methods of time and space to manage the storage space. This mode not only meets the needs of using different files, but also stores and manages non-audio and video files.
3) Material distribution
The OpenNet system has the function of material distribution, but it is essentially different from the copying of materials. First of all, the copying of the material is at different work sites. At different times, copying different parts of the same piece of material will inevitably consume a lot of network bandwidth. Because the video file is usually relatively large, it will take a long time. Material distribution is to distribute the same material to all the users needed at the same time. That is to say, when the system distributes materials, the transmission time to one user and multiple users are the same. In the use of the non-editing network, the system can distribute the same material to multiple program production terminals at the same time. The production personnel only need to submit the project without packaging the finished product, and the program content can be identified by serializing. In addition, the system is also equipped with a verification function, which will automatically verify the original material and the transmitted material when broadcasting. When a packet loss is found, it will automatically contact the site that sent the material for repair.
4) Web logs
In order to manage the high-definition network more conveniently, the system provides a network log function to record the network usage and the people who use it. Through the log, you can query the details of network use, for example, you can query the account used at a workstation on a certain day of the month What features have been passed. The establishment of these logs enables network management personnel to grasp the system usage in real time in detail, which brings convenience to the maintenance and management of the system.
Summary
The establishment of a high-definition non-linear editing network in the film and television production center of the Science and Technology Park of Capital Normal University has successfully met the demand for video production in the film and television production center of the science and technology park in terms of technological advancement and scale, and has high program production efficiency and quality. The general video network management system of synchronous technology adopts advanced concepts and technologies, which plays a good role in ensuring the scientific management and subsequent development of non-linear editing networks. This high-definition production network has become an excellent platform for film and television production by many enterprises in the park, and has also provided better services for the goal of achieving the "cultural creativity" characteristic of the science and technology park.
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