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30results about How to "Save transcoding time" patented technology

Media format conversion method and system based on cloud computing architecture

The embodiment of the invention provides a media format conversion method and a media format conversion system based on cloud computing architecture. The method mainly comprises the following steps that a transcoding platform based on the cloud computing architecture is constructed on the network side, and the transcoding platform is used for receiving a media file which is submitted by a browser of a client and needs format conversion and dividing the media file into a plurality of sub-media files; according to a set mission control strategy, a plurality of transcoding servers are selected from a transcoding server cluster in the transcoding platform, and each transcoding server is used for performing format conversion on one sub-media file, so as to obtain one transcoding sub-media file; and all of the transcoding sub-media files are combined to obtain a transcoding media file of the media file, and the transcoding media file is returned to the browser of the client. By using the method and the system provided by the embodiment of the invention, the conversion problem of various video formats is effectively solved, the transcoding time is reduced, and the problem that much time is consumed in format conversion of a large video file and multiple video files is solved.
Owner:HUADI COMP GROUP +1

H.264-to-H.265 video transcoding method and transcoder

InactiveCN104038764AReduce transcoding complexityLow costDigital video signal modificationVideo qualityMotion vector
The invention provides an H.264-to-H.265 video transcoding method which comprises an H.264 decoding process and an H.265 encoding process. According to the H.264 decoding process, code streams conforming to the H.264 standard are completely decoded into a pixel domain, and the encoding macro block type, the encoding block mode and the residual sum of each macro block of all frames I and the encoding macro block type, the motion vector, the reference frame and the residual sum of each macro block of all frames P are extracted in the decoding process. According to the H.265 encoding process, H.265 encoding is carried out according to the H.264 decoding result to obtain H.265 video, corresponding processing according to CTU setting and frame types is included, search branches are properly reduced, and encoding complexity is reduced. Therefore, video transcoding time can be effectively reduced under the condition of guaranteeing that video quality is slightly reduced and the code rate is slightly increased, and popularization of the H.265 standard and network bandwidth saving are facilitated.
Owner:HUAZHONG NORMAL UNIV

Method and system for parallel trans-coding of video slicing

The invention is suitable for the technical field of audio-video playing, and discloses a method and a system for parallel trans-coding of video slicing. The method comprises the following steps of: disassembling an original video file into a plurality of first video segments; simultaneously trans-coding the first video segments after disassembling into second video segments; and assembling a plurality of the second video segments after trans-coding into a video file with a new format. In the method, by disassembling the original video file into the plurality of the first video segments, simultaneously trans-coding the first video segments after disassembling into the second video segments, and assembling the plurality of the second video segments after trans-coding into the video file with the new format, not only the trans-coding time is saved and the trans-coding efficiency is improved, but also the texture of a picture is well ensured, and the method and the system are favorable for popularizing an audio-video playing device.
Owner:SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI

Method and device for transcoding distribution, method and device for transcoding

The invention discloses a method for transocding distribution based on a cloud platform, and the method for transcoding distribution is used for improving transcoding efficiency. The method for transcoding distribution comprises the following steps: obtaining transcoding complexity of each video clip to be transcoded and transcoding performance values of calculating equipment which form the cloud platform; according to the transcoding complexity of each video clip to be transcoded and the transcoding performance values of the calculating equipment, obtaining a needed first average time of each one of the calculating equipment carrying out transcoding for the video clip distributed for the each one of the calculating equipment; judging whether needed transcoding time of a first calculating device for transcodiing a first video clip is larger than the first average time; if a result is no, distributing the first video clip to the first calculating device to carry out transcoding. The invention further discloses a device used for achieving the method for transcoding distribution and a method and device for transcoding.
Owner:PEKING UNIV

Distributed media format code transferring method

The invention relates to a transcoding technology, in particular to a distributed media format transcoding method. Aiming at the defects of the prior art, the invention proposes the distributed media format transcoding method which can carry out the real-time transcoding of media content. The key points of the technical proposal can be summarized as follows: a. a media source device carries out the sub-chip processing on a media source; b. the media source device carries out selective distribution on sub-chips; c. a media source transcoding device carries out the transcoding operation on the sub-chips according to a target format which is designated by the media source device; d. the media source transcoding device returns the sub-chips after the completion of the transcoding to the media source device after the completion of the sub-chip transcoding and simultaneously returns the serial numbers of the sub-chips; and e. the media source device carries out the sequencing and the merging of the sub-chips after receiving the sub-chips after the transcoding according to the serial numbers of the sub-chips so that a complete media source after the transcoding is formed by connection. The distributed media format transcoding method has the advantages that the distributed media format transcoding method can realize the real-time transcoding function and save the transcoding time.
Owner:SICHUAN CHANGHONG ELECTRIC CO LTD

AVS-to-HEVC optimal video transcoding method based on support vector machine

InactiveCN104837019AReduce transcoding complexityImprove transcoding speedDigital video signal modificationFeature vectorSupport vector machine
The invention discloses an AVS-to-HEVC optimal video transcoding method based on a support vector machine. The method comprises steps of collecting characteristic vectors of AVS code streams; learning the characteristic vectors through the support vector machine and obtaining a training model; classifying the extracted AVC characteristic vectors into two types comprising one type that CUs arranged at corresponding positions in the HEVC are divided, and the other type that the CUs arranged at the corresponding positions in the HEVC are not divided; predicting whether the CUs are required to be divided through the training model in a transcoding stage; performing 2N*2N mode calculation and SKIP mode calculation under the depth of the current HEVC when the current CUs are required to be divided, and selecting an optimum prediction mode from the two modes; and performing optimal mode selection according to an HEVC standard coding process when the current CUs are not required to be divided according to the prediction. The method combines basic ideas of machine learning, a whole transcoding process is divided into a training stage and the transcoding stage, the training model is obtained through learning, the division of the CUs in the HEVC is predicted, and a rapid mode selection algorithm is combined in the method, so that the transcoding speed is increased, and the whole video quality of transcoded videos is guaranteed.
Owner:SHANGHAI JIAO TONG UNIV

Distributed video transcoding method and related device and system

A distributed video transcoding method and an associated device and system are disclosed. The method is characterized by comprising the steps in which, a submit transcoding client carries out segment identification of duration of video files, obtains each segment duration and segment initial time of each segment duration, and a transcoding scheduling end transmits a transcoding executing message to each target transcoding executing end, each transcoding executing message including a storage address of the video file, a video ID, the segment duration and the segment initial time of the segment duration; each target transcoding executing end acquires the video file according to the storage address and the video ID that are included in the received transcoding executing message, transcodes the corresponding video in the video file defined by the segment duration and the segment initial time of the segment duration that are included in the transcoding executing message, and acquires transcoding results; and each target transcoding executing end merges the obtained transcoding results and obtains the video file. The invention can shorten the video transcoding time and improving the video transcoding efficiency.
Owner:TENCENT TECH (SHENZHEN) CO LTD +1

Direct mode selection based H.264/AVC (Advanced Video Coding) fast transcoding method and device

InactiveCN101888547AIt is estimated that the operation is simple and easyPreserve encoded image qualityTelevision systemsDigital video signal modificationGroup of picturesTranscoding
The invention discloses direct mode selection based H.264 / AVC (Advanced Video Coding) fast transcoding method and device, which mainly overcomes the defects of high operation complexity, poor real-time performance and high occupancy rate on operation / storage and other resources in the prior art. The transcoding device comprises a decoder, a macroblock distortion estimation module, a macroblock mode selection module and a coder, wherein the decoder decodes a compressed code stream to obtain a macroblock mode, movement information, a residual and a decoding frame image; the macroblock distortion estimation module and the macroblock mode selection module perform macroblock distortion estimation and fast mode selection according to the decoding information and the reference frames of the coder and the decoder; and the coder performs RDO (Remote Data Objects) judgment to the I frame of the current GOP (Group of Pictures) and the first P frame, and counts the average distortion of the firstP frame in all optimal interframe mode as a threshold for the fast mode selection, otherwise, the fast coding is carried out on the decoding frame image to obtain the H.264 / AVC compressed code streamwith a set target code rate. The invention greatly reduces the operation complexity of transcoding and decreases the time on transcoding, and can be applied to the real-time multimedia transmission and other data transmissions.
Owner:XIDIAN UNIV

Video file cutting method and distributed transcoding method

The invention discloses a video file cutting method for distributed transcoding, and a distributed transcoding method. The method comprises the steps: receiving a source file; carrying out the de-multiplexing of the received source file, and obtaining a video file and an audio file; taking GOP as a unit to segment the video file, and obtaining segmented video files; calculating the time duration when a plurality of transcoding computers process the segmented video files; calculating the segmented video files according to the calculated time duration of each transcoding computer; and transmitting the segmented video files to the corresponding transcoding computers according to the calculation results. The methods provided by the invention enable each transcoding computer to complete transcoding as simultaneously as possible, save transcoding time, and improves the distributed transcoding efficiency.
Owner:BEIJING BAOFENG TECH

Distributed video transcoding method

The invention provides a distributed large-scale video transcoding system, and belongs to the technical field of big data and video processing. According to the method, large-scale video transcoding is implemented through adoption of a distributed method on a big data processing platform Hadoop. In the method, large-scale video data is stored with an HDFS file system, distributed processing is performed with a MapReduce programming module, and processing of videos is implemented by means of a multimedia library Xuggler. The storage and transcoding of the large-scale video data are implemented with the expandability and stability characteristics of the distributed file system; the defects of high hardware requirement, difficulty in maintenance, difficulty in expansion and the like in the conventional centralized storage are overcome; and the ever-increasing storage and transcoding demands of the large-scale video data are met dynamically.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

Real-time transcoding method and device for use in frame rate reducing process

The invention discloses a real-time transcoding method for use in a frame rate reducing process. The method comprises the following steps: judging whether a current frame needs to be extracted and discarded or not under an equal-interval extraction situation according to a frame rate of an input code stream and a frame rate of a target code stream; extracting and discarding a first non-reference frame after the current frame if the current frame needs to be extracted and discarded and is a reference frame, and extracting and discarding the current frame if the current frame needs to be extracted and discarded and is a non-reference frame; and decoding the non-discarded current frame to obtain a current decoded frame, and predicting a frame type and macroblock coding information of a transcoded frame according to a frame type and macroblock coding information of the current frame in order to code the current decoded frame. The invention also discloses a real-time transcoding device for use in the frame rate reducing process. According to the real-time transcoding method and device for use in the frame rate reducing process provided by the invention, the reference frame is kept in the frame rate reducing process, and the frame type and the macroblock coding information of the transcoded frame which corresponds to the current frame are predicted to perform transcoding, so that efficient real-time transcoding is realized.
Owner:LETV HLDG BEIJING CO LTD +1

Distributed video transcoding method and device

The invention discloses a distributed video transcoding method. The distributed video transcoding method comprises the following steps: a main server segments a video file uploaded by a user to form video segments; a distributed storage device receives the video segments sent by the main server and analyzes the video segments to obtain key / value pairs; a corresponding number of key / value pairs, corresponding to a transcoding task quantity, are acquired from a server according to the transcoding task quantity; the video segments in the distributed storage device are downloaded according to the key / value pairs; the downloaded video segments are transcoded; the distributed storage device receives the video segments after being transcoded from the server and then analyzes the transcoded video segments to obtain transcoded key / value pairs; the main server downloads transcoded video segments from the distributed storage device according to the transcoded key / value pairs and then combines the downloaded video segments. Based on the distributed video transcoding method, the video transcoding time is effectively reduced, and the transcoding efficiency is improved. The invention also discloses a distributed video transcoding device.
Owner:ZHUHAI GOTECH INTELLIGENT TECH

Transcoding method and apparatus

The embodiment of the application discloses a transcoding method and apparatus. The method comprises: a corresponding relationship between a plurality of definition values and resolution ratios is established in advance; a first definition value and a second definition value are selected from the plurality of definition values and a first resolution ratio and a second resolution ratio that correspond to the first definition value and the second definition value respectively are determined; according to the first resolution ratio and the second resolution ratio, transcoding is carried out on a first part content of a media file according to a preset transcoding rule, and a first real-time quantization parameter value and a second real-time quantization parameter value in the transcoding process are recorded; whether the first real-time quantization parameter value and the second real-time quantization parameter value meet a preset checking rule is determined; if not, the first resolution ratio and / or the second resolution ratio are adjusted; and according to the adjusted first resolution ratio and / or the second resolution ratio, transcoding is carried out on the part without transcoding in the media file. The embodiment of the application discloses a transcoding method and apparatus, so that the transcoding speed of the media file can be increased.
Owner:ALIBABA GRP HLDG LTD

An Efficient and Adaptive Video Transcoding System Based on Data Mining

The invention discloses an efficient self-adaptive video transcoding system and method based on data mining. The method includes the following steps that step1, a video, to be transcoded, of a first compression standard is input; step2, the video to be transcoded is decoded to generate a video to be encoded, and decoding information of all macro blocks of all video frames is extracted; step3, the extracted decoding information is input in an encoding macro block mode decision-making tree, and encoding macro block modes for all the micro blocks of all the video frames of the video to be encoded are determined through the encoding macro block mode decision-making tree; step4, according to the determined encoding macro block modes and motion vectors of all the micro blocks, all the micro blocks of all the video frames of the video to be encoded are encoded according to a second compression standard, so that the video to be encoded is encoded to be a transcoded video of the second compression standard.
Owner:BEIJING UNIV OF POSTS & TELECOMM

H.265 rapid transcoding method based on code stream bit number and block division mapping

InactiveCN106454343AEnsure subjective and objective visual qualityReduce computationDigital video signal modificationTranscodingOperand
The invention provides an H.265 rapid transcoding method based on code stream bit number and block division mapping. The information in the input code stream is fully utilized to guide the H.265 coding, the operand of block division and mode selection is reduced to greatly shorten the transcoding time, and meanwhile, the subjective and objective visual quality of the transcoded video can be guaranteed. The code stream format is not limited to H.265 isomorphic transcoding, and the technology supports H.264 / AVC or H.263++, even earlier heterogeneous transcoding of MPGE standards.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

A distributed video transcoding method

The invention provides a distributed-based large-scale video transcoding system, which belongs to the technical field of big data and video processing. The method of the present invention adopts a distributed method on the big data processing platform Hadoop to finally realize large-scale video transcoding, the method utilizes the HDFS file system to store large-scale video data, utilizes the MapReduce programming model to carry out distributed processing, and uses the multimedia library Xuggler implements video processing. The invention utilizes the scalability and stability characteristics of the distributed file system to realize the storage and transcoding of large-scale video data, solves the shortcomings of traditional centralized storage such as high hardware requirements, difficult maintenance, and difficult expansion, and dynamically adapts to the growing Large-scale video data storage and transcoding requirements.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

Transcoding method from h.264/svc to h.264/avc based on p2pvod video-on-demand system

The invention provides a transcoding method from H.264 / SVC(scalable video coding) to H.264 / AVC(advanced video coding) based on a video on demand system of P2PVoD, belonging to the field of video transcoding. With the adoption of SVC self-adapting transcoding, an SVC document is divided into independent multi-layer documents according to layers by a separator, before transcoding, a space layer and a quality layer are subjected to a self-adaption process according to the terminal ability, layers not needed are abandoned to enable the transcoding process to effectively reduce unnecessary time consumption, and the video quality matching with the ability of a client end is provided for the client end; with the adoption of a method combining a pixel region and an alternation region, time complexity is lowered, and error shift is effectively controlled; with the adoption of an encoding control optimized algorithm based on Lagrangian, when an average distortion function is being solved, a sum of absolute difference (SAD) is used for substituting a sum of squared difference (SSD), and the calculation complexity is simplified; and with the adoption of a processing mechanism by parallel threads based on GOP (group of pictures), the single-encoded GOP is processed by parallel threads, and thus the transcoding time is greatly reduced.
Owner:CHONGQING UNIV

Method and system for media format conversion based on cloud computing architecture

The embodiment of the invention provides a media format conversion method and a media format conversion system based on cloud computing architecture. The method mainly comprises the following steps that a transcoding platform based on the cloud computing architecture is constructed on the network side, and the transcoding platform is used for receiving a media file which is submitted by a browser of a client and needs format conversion and dividing the media file into a plurality of sub-media files; according to a set mission control strategy, a plurality of transcoding servers are selected from a transcoding server cluster in the transcoding platform, and each transcoding server is used for performing format conversion on one sub-media file, so as to obtain one transcoding sub-media file; and all of the transcoding sub-media files are combined to obtain a transcoding media file of the media file, and the transcoding media file is returned to the browser of the client. By using the method and the system provided by the embodiment of the invention, the conversion problem of various video formats is effectively solved, the transcoding time is reduced, and the problem that much time is consumed in format conversion of a large video file and multiple video files is solved.
Owner:HUADI COMP GROUP +1
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