CN1812550A - Video frequency source material synthesizing method - Google Patents
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Abstract
本发明涉及一种视频素材合成的方法,属于广播电视播控系统技术领域。现有技术中,电视台采用录像机来实现多个视频素材的合成,素材合成时,需先定位合成素材的入点和出点,然后预览、生成合素材,但是,录像机是线性播放设备,定位入点和出点比较麻烦,合成费时;修改也很困难;容易损坏磁带。视频服务器虽然素材定位容易,但是没有素材合成功能。本发明所述的方法,利用视频服务器的控制特性,记录素材定位的入点和出点并映射为逻辑映射表,达到逻辑上合成的效果;如需修改时只需修改逻辑映射表的入点和出点信息。采用本发明所述的方法,大大提高了素材合成效率,修改方便,视频内容和声音不受任何损伤;也不需要额外的存储介质和设备。
The invention relates to a video material synthesis method, belonging to the technical field of radio and television broadcast control systems. In the prior art, the TV station uses a video recorder to realize the synthesis of multiple video materials. When synthesizing the materials, it is necessary to locate the in-point and the out-point of the synthesized material first, and then preview and generate the combined material. However, the video recorder is a linear playback device. It is troublesome to point and point out, and time-consuming to synthesize; it is also very difficult to modify; it is easy to damage the tape. Although the video server is easy to locate the material, it has no material synthesis function. The method of the present invention uses the control characteristics of the video server to record the in-point and out-point of material positioning and map it into a logical mapping table to achieve the effect of logical synthesis; if it needs to be modified, it only needs to modify the in-point of the logical mapping table and point information. By adopting the method of the invention, the material synthesis efficiency is greatly improved, the modification is convenient, and the video content and sound are not damaged in any way; additional storage media and equipment are not required.
Description
技术领域technical field
本发明属于广播电视播控系统技术领域,具体涉及一种视频素材合成的方法。The invention belongs to the technical field of radio and television broadcast control systems, and in particular relates to a method for synthesizing video materials.
背景技术Background technique
在广播电视系统中,观众看到的各种电视节目都是将各种素材加工和合成后的效果,显然,素材的制作是播出的前提,也是非常重要的一个环节。在素材的制作过程中,大量的工作是素材的合成,也就是将多个不同素材的不同内容合成为一条素材,用于播出。现有技术中,电视台通常采用录像机来实现多个素材的合成,进行素材合成时,工作人员先定位需要合成的素材的入点和出点,预览合成的素材效果,如果预览没有问题,然后生成合成的素材。但是,由于录像机是线性播放设备,定位素材的入点和出点比较麻烦,合成比较费时;如果其他人员审看合成后的素材时发现不合格,则需要重新合成素材,工作效率低下;同时,对磁带的多次播放也容易损坏磁带。然而,在广播电视系统中,视频服务器是非线性播放设备,素材定位容易,播放控制效率高,对素材视频内容和声音无损坏问题,但是它没有素材合成功能,不能在未实际生成前预览。另外,当素材分别位于不同视频服务器时,如何快速合成是一个难题。In the radio and television system, the various TV programs that the audience sees are the effects of processing and synthesizing various materials. Obviously, the production of materials is the premise of broadcasting, and it is also a very important link. In the process of material production, a lot of work is the synthesis of materials, that is, the different contents of multiple different materials are synthesized into one material for broadcasting. In the prior art, TV stations usually use video recorders to synthesize multiple materials. When synthesizing materials, the staff first locates the in-point and out-point of the material to be synthesized, and previews the effect of the synthesized material. If there is no problem with the preview, then generate Composite material. However, since the video recorder is a linear playback device, it is troublesome to locate the in-point and out-point of the material, and the synthesis is time-consuming; if other personnel review the synthesized material and find that it is unqualified, they need to re-synthesize the material, which is inefficient; at the same time, Multiple plays of the tape can also easily damage the tape. However, in the broadcast television system, the video server is a non-linear playback device. It is easy to locate the material, has high playback control efficiency, and has no damage to the video content and sound of the material. However, it has no material synthesis function and cannot be previewed before it is actually generated. In addition, when the materials are located on different video servers, how to quickly synthesize them is a difficult problem.
发明内容Contents of the invention
针对现有技术存在的问题和缺陷,本发明的目的是提供一种视频素材合成的方法,该方法能够利用视频服务器的硬盘非线性存储特性和控制特性,结合视频文件系统存储特性和视频文件压缩编码算法,采用唯一标识快速查询元素材,采用关键帧查寻定位的方法快速记录元素材定位的入点和出点并映射为逻辑映射表,同时生成设备属性控制表和特效辅助表,利用逻辑控制中心生成虚拟素材,利用高精度预览中心预览该素材,达到逻辑上合成的效果;如果合成的逻辑素材审看不合格重新制作时,只需修改逻辑表的入点和出点信息。In view of the problems and defects in the prior art, the purpose of the present invention is to provide a method for video material synthesis, which can utilize the hard disk nonlinear storage characteristics and control characteristics of the video server, combined with the video file system storage characteristics and video file compression The coding algorithm uses the unique identifier to quickly query the element material, and uses the method of key frame search and positioning to quickly record the in-point and out-point of the element material location and map it into a logical mapping table. At the same time, it generates a device attribute control table and special effect auxiliary table. The center generates virtual material, and uses the high-precision preview center to preview the material to achieve the effect of logical synthesis; if the synthesized logical material fails to pass the inspection and is re-made, only the in-point and out-point information of the logic table needs to be modified.
为达到以上目的,本发明采用的技术方案是:一种视频素材合成的方法,包括以下步骤:In order to achieve the above object, the technical solution adopted in the present invention is: a method for video material synthesis, comprising the following steps:
(1)从视频服务器的视频素材库中定位需要合成的视频素材入点和出点信息;(1) locate the video material entry and exit point information that needs to be synthesized from the video material library of the video server;
进一步,上述定位的具体方法如下:Further, the specific method of the above positioning is as follows:
1)首先根据硬盘非线性存储特性和视频文件系统特性,利用文件唯一标识,分类快速查询定位要编辑的各元素材;1) First, according to the non-linear storage characteristics of the hard disk and the characteristics of the video file system, use the unique identifier of the file to quickly query and locate each element material to be edited;
2)然后根据视频文件压缩编码算法,提取编码特征和关键帧信息等,生成关键帧索引表,采用关键帧索引快速定位元素材的入点和出点,记录该信息;2) Then according to the video file compression encoding algorithm, extract encoding features and key frame information, etc., generate a key frame index table, use the key frame index to quickly locate the entry point and exit point of the element material, and record the information;
(2)将定位的入点和出点信息记录到逻辑映射表中,形成逻辑映射;(2) Record the in-point and out-point information of the positioning in the logical mapping table to form a logical mapping;
进一步,该步骤中还包括以下操作:提取各元素材所在的设备的设备属性,按元素材唯一标识进行索引存储,生成设备属性控制表,用于后期精确控制;根据编辑要求和上述的元素材关键帧索引表,设置各元素材之间的过渡特效,生成特效辅助表;Further, this step also includes the following operations: extract the device attributes of the device where each element material is located, index and store according to the unique identifier of the element material, and generate a device attribute control table for precise control in the later stage; according to the editing requirements and the above-mentioned element material Key frame index table, set the transition effects between each element material, and generate special effect auxiliary table;
(3)根据逻辑映射表中记录的素材信息预览合成的素材;(3) Preview the synthesized material according to the material information recorded in the logical mapping table;
进一步,该步骤是按如下方法实现的:首先根据步骤(2)中生成的逻辑映射表、设备属性控制表和特效辅助表,在逻辑控制中心中把所需要的各元素材视频片断、元素材所在设备属性和特效辅助按编辑要求排列顺序进行排列,生成一条虚拟素材;然后利用高精度预览中心根据该虚拟素材的信息和视频服务器的控制特性进行虚拟合成后的预览,检验合成素材效果;Further, this step is realized as follows: first, according to the logical mapping table, equipment attribute control table and special effect auxiliary table generated in step (2), in the logic control center, each element material video segment and element material required The properties of the equipment and the special effect assistants are arranged in order according to the editing requirements, and a virtual material is generated; then, the high-precision preview center is used to preview after virtual synthesis according to the information of the virtual material and the control characteristics of the video server, and check the effect of the synthesized material;
再进一步,步骤(3)中所播放的素材是按照逻辑映射表记录的素材信息将各段素材无缝连接、顺序播出,素材播放精确到帧。Furthermore, the materials played in step (3) are seamlessly connected and sequentially played out according to the material information recorded in the logical mapping table, and the material playback is accurate to the frame.
(4)如合成的素材需要修改,则在预览中修改素材的入点和出点信息,同时更新逻辑映射表和特效辅助表;(4) If the synthesized material needs to be modified, modify the in-point and out-point information of the material in the preview, and update the logical mapping table and special effect auxiliary table at the same time;
(5)重复前面的步骤,直到完成视频素材的合成。(5) Repeat the previous steps until the synthesis of the video material is completed.
进一步,视频素材合成后,根据逻辑映射表录制对应的内容到存储介质中。所述的存储介质为硬盘或磁带。Further, after the video material is synthesized, the corresponding content is recorded to the storage medium according to the logical mapping table. The storage medium is hard disk or magnetic tape.
本发明的效果在于:采用本发明所述的方法,大大提高了视频素材合成效率,修改方便,对视频素材的内容和声音无任何损伤;合成效果是通过视频服务器对逻辑入、出点进行控制,不需要额外的存储介质和设备。The effect of the present invention is: adopting the method described in the present invention greatly improves the video material synthesis efficiency, is convenient to modify, and does not have any damage to the content and sound of the video material; the synthesis effect is controlled by the video server to the logical entry and exit points , no additional storage media and devices are required.
附图说明Description of drawings
图1是本发明所述方法的流程图。Figure 1 is a flow chart of the method of the present invention.
具体实施方式Detailed ways
下面结合附图及具体实施方式对本发明做进一步的描述:The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:
如图1所示,一种视频素材合成的方法,包括以下步骤:As shown in Figure 1, a method for video material synthesis comprises the following steps:
(1)从视频服务器的视频素材库中定位需要合成的视频素材入点和出点信息;(1) locate the video material entry and exit point information that needs to be synthesized from the video material library of the video server;
具体来说,本实施例是按如下方法实现的:Specifically, the present embodiment is realized as follows:
1)首先根据硬盘非线性存储特性和视频文件系统特性,利用文件唯一标识,分类快速查询定位要编辑的各元素材;1) First, according to the non-linear storage characteristics of the hard disk and the characteristics of the video file system, use the unique identifier of the file to quickly query and locate each element material to be edited;
2)然后根据视频文件压缩编码算法,提取编码特征和关键帧信息等,生成关键帧索引表,采用关键帧索引快速定位元素材的入点和出点,记录该信息;2) Then according to the video file compression encoding algorithm, extract encoding features and key frame information, etc., generate a key frame index table, use the key frame index to quickly locate the entry point and exit point of the element material, and record the information;
(2)将定位的入点和出点信息记录到逻辑映射表中,形成逻辑映射;(2) Record the in-point and out-point information of the positioning in the logical mapping table to form a logical mapping;
本实施例中,在形成逻辑映射时,还提取各元素材所在的设备的设备属性,按元素材唯一标识进行索引存储,生成设备属性控制表,用于后期精确控制;再根据编辑要求和上述的元素材关键帧索引表,设置各元素材之间的过渡特效,生成特效辅助表;In this embodiment, when forming the logical mapping, the device attributes of the device where each element material is located are also extracted, indexed and stored according to the unique identifier of the element material, and a device attribute control table is generated for later precise control; then according to the editing requirements and the above The element material key frame index table, set the transition effect between each element material, and generate the special effect auxiliary table;
(3)根据逻辑映射表中记录的素材信息预览合成的素材;(3) Preview the synthesized material according to the material information recorded in the logical mapping table;
具体来说,本实施例中是根据以上生成的逻辑映射表、设备属性控制表和特效辅助表,在逻辑控制中心中把所需要的各元素材视频片断、元素材所在设备属性和特效辅助按编辑要求排列顺序进行排列,生成一条虚拟素材;利用高精度预览中心根据该虚拟素材的信息和视频服务器的控制特性进行虚拟合成后的预览,检验合成素材效果;Specifically, in this embodiment, according to the logical mapping table, device attribute control table, and special effect auxiliary table generated above, in the logic control center, the required element material video clips, the device attributes where the element material is located, and the special effect auxiliary table are arranged according to Arrange the order of editing requirements to generate a virtual material; use the high-precision preview center to preview after virtual synthesis according to the information of the virtual material and the control characteristics of the video server, and check the effect of the synthesized material;
步骤(3)中所播放的素材是按照逻辑映射表记录的素材信息将各段素材无缝连接、顺序播出,素材播放精确到帧。The materials played in step (3) are seamlessly connected and sequentially played out according to the material information recorded in the logical mapping table, and the material playback is accurate to the frame.
(4)如合成的素材需要修改,则在预览中修改素材的入点和出点信息,同时更新逻辑映射表和特效辅助表;(4) If the synthesized material needs to be modified, modify the in-point and out-point information of the material in the preview, and update the logical mapping table and special effect auxiliary table at the same time;
修改合成的后素材只需直接修改素材的入点和出点信息,不需要生成实际合成素材后,再根据实际合成素材的效果修改入点和出点信息;直接修改是指素材合成不符合合成要求时,可以对映射关联的素材的入点和出点进行修正,然后,再次预览审看,在此过程中,无需实际合成;所述实际合成是指将各段打过入点和出点的素材真实的录制到存储介质上成为一条素材。To modify the synthesized material, you only need to directly modify the in-point and out-point information of the material, and then modify the in-point and out-point information according to the effect of the actual synthesized material after generating the actual synthesized material; direct modification means that the material synthesis does not conform to the synthesis When required, the in-point and out-point of the material associated with the mapping can be corrected, and then previewed again. In this process, there is no need for actual synthesis; the actual synthesis refers to typing each segment through the in-point and out-point The material is actually recorded on the storage medium and becomes a piece of material.
(5)重复前面的步骤,直到完成视频素材的合成。(5) Repeat the previous steps until the synthesis of the video material is completed.
(6)视频素材合成后,根据逻辑映射表录制对应的内容到存储介质中。所述的存储介质为硬盘或磁带,或者其它可以存储的介质。(6) After the video material is synthesized, record the corresponding content to the storage medium according to the logical mapping table. The storage medium is a hard disk or magnetic tape, or other storage medium.
下面以完成一个素材合成任务为例说明利用本发明所述的方法实现视频素材合成的方法,具体实现方法如下:Take the completion of a material synthesis task as an example below to illustrate the method of utilizing the method of the present invention to realize video material synthesis. The specific implementation method is as follows:
假设需要合成的元素材两条,Assuming that there are two elements to be synthesized,
标识为100001,标题为:奥运吉祥物展示,时长从00:00:00:00帧开始,00:00:29:24,即30秒素材;The logo is 100001, the title is: Olympic mascot display, the duration starts at frame 00:00:00:00, 00:00:29:24, which is 30 seconds of material;
表识为200001,标题为:奥运北京风光,时长从00:00:00:00帧开始,00:00:59:24,即60秒素材;The ID is 200001, the title is: Olympic Beijing Scenery, the duration starts at frame 00:00:00:00, 00:00:59:24, which is 60 seconds of material;
需要10001为00:00:10:00帧到00:00:20:24帧,200001为00:00:15:00帧到00:00:50:00帧,合成为一条素材,中间过渡为淡入淡出,元素材分别存储与两台服务器。10001 needs to be from frame 00:00:10:00 to frame 00:00:20:24, frame 200001 is from frame 00:00:15:00 to frame 00:00:50:00, synthesized into one material, and the middle transition is fade-in Fade out, the elements are stored separately with two servers.
1)利用文件系统特性,快速定位元素材100001和200001;1) Using the characteristics of the file system, quickly locate the element material 100001 and 200001;
2)提取元素材100001和200001编码特征和关键帧信息等,生成关键帧索引表,快速定位元素材的入点和出点,记录该信息;即:10001的00:00:10:00帧和00:00:20:24帧,200001的00:00:15:00帧和00:00:50:00帧2) Extract the encoding features and key frame information of the element material 100001 and 200001, generate a key frame index table, quickly locate the in-point and out-point of the element material, and record the information; namely: the 00:00:10:00 frame of 10001 and 00:00:20:24 frame, 00:00:15:00 frame and 00:00:50:00 frame of 200001
3)将10001的00:00:10:00帧和00:00:20:24帧,200001的00:00:15:00帧和00:00:50:00帧记录到逻辑映射表中,形成逻辑映射;3) Record the 00:00:10:00 frame and 00:00:20:24 frame of 10001, the 00:00:15:00 frame and 00:00:50:00 frame of 200001 into the logical mapping table to form logical mapping;
4)提取10001和200001的所在的设备的设备属性,按元素材唯一标识10001和200001进行索引存储,生成设备属性控制表,用于后期精确控制;4) Extract the device attributes of the devices where 10001 and 200001 are located, index and store according to the unique identifiers 10001 and 200001 of the element material, and generate a device attribute control table for later precise control;
5)根据编辑要求和元素材关键帧索引表,设置10001和200001之间的过渡特效为淡入淡出,生成特效辅助表;5) According to the editing requirements and the element material key frame index table, set the transition effect between 10001 and 200001 to fade in and fade out, and generate a special effect auxiliary table;
6)根据上述信息,在逻辑控制中心中把所需要的10001的00:00:10:00帧和00:00:20:24帧,200001的00:00:15:00帧和00:00:50:00帧的视频片断、元素材所在设备属性和特效辅助按编辑要求排列顺序进行排列,生成一条虚拟素材;6) According to the above information, put the required 00:00:10:00 frame and 00:00:20:24 frame of 10001, and the 00:00:15:00 frame and 00:00 frame of 200001 in the logic control center: The video clips at frame 50:00, the device properties of the element materials and the special effects are arranged in order according to the editing requirements to generate a virtual material;
7)利用高精度预览中心根据该虚拟素材的信息和视频服务器的控制特性进行虚拟合成后的预览,检验合成素材效果;7) Utilize the high-precision preview center to preview after the virtual synthesis according to the information of the virtual material and the control characteristics of the video server, and check the effect of the synthesized material;
8)如合成的素材符合要求,则完成本次合成;否则,需要修改,则在预览中重新修改素材100001和200001的入点和出点信息,同时更新逻辑映射表和特效辅助表,重复前面步骤;8) If the synthesized material meets the requirements, complete the synthesis; otherwise, if it needs to be modified, re-modify the in-point and out-point information of material 100001 and 200001 in the preview, and update the logical mapping table and special effect auxiliary table at the same time, repeat the previous step;
9)视频素材合成后,根据是否生成实际素材的要求,可以生成,录制到存储介质中,也可以不生成,只保留虚拟素材使用;录制素材时,根据逻辑映射表录制对应的内容到存储介质中。所述的存储介质为硬盘或磁带,或者其它可以存储的介质。9) After the video material is synthesized, according to the requirements of whether to generate actual material, it can be generated and recorded into the storage medium, or not generated, and only the virtual material is reserved for use; when recording the material, record the corresponding content to the storage medium according to the logical mapping table middle. The storage medium is a hard disk or magnetic tape, or other storage medium.
本发明所述的方法并不限于具体实施方式中所述的实施例,本领域技术人员根据本发明的技术方案得出其他的实施方式,同样属于本发明的技术创新范围。The method described in the present invention is not limited to the examples described in the specific implementation manners, and those skilled in the art can obtain other implementation manners according to the technical solutions of the present invention, which also belong to the technical innovation scope of the present invention.
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CN102572302A (en) * | 2010-12-31 | 2012-07-11 | 新奥特(北京)视频技术有限公司 | Multi treatment methods for key frame curve after modifying exit and entry points of materials |
CN102682458A (en) * | 2011-03-15 | 2012-09-19 | 新奥特(北京)视频技术有限公司 | Synchronous regulating method of multi-stunt multi-parameter of key frame animation curve |
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CN102572302B (en) * | 2010-12-31 | 2017-02-08 | 新奥特(北京)视频技术有限公司 | Multi treatment methods for key frame curve after modifying exit and entry points of materials |
CN102682458A (en) * | 2011-03-15 | 2012-09-19 | 新奥特(北京)视频技术有限公司 | Synchronous regulating method of multi-stunt multi-parameter of key frame animation curve |
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CN103455474A (en) * | 2013-08-16 | 2013-12-18 | 北京奇艺世纪科技有限公司 | Editing method and system of image materials |
CN103455474B (en) * | 2013-08-16 | 2016-06-08 | 北京奇艺世纪科技有限公司 | The edit methods of a kind of image material and system |
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