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

The invention discloses an MPEG-2 (Moving Pictures Experts Group-2) to H.264 fast video transcoding method, comprising the following steps of: firstly saving coding macro block modes of macro blocks in a P frame, coding block modes of the macro blocks and four 8*8 direct current coefficients in the macro blocks in MPEG-2 original video decoding process; secondly dividing all macro blocks in the Pframe into five different types of macro blocks according to the saved coding macro types and the coding block modes; thirdly, only self-adaptively selecting the optimal coding mode from the coding modes having larger relativity with the performances of the macro blocks to code the macro blocks in the H.264 coding process. The method largely reduces the number of candidate coding modes for coding the macro blocks in the P frame in the premise of ensuring that the reduction of the video quality is a little and the increment of the code rate is not much, thereby effectively reducing the time complexity of macro code coding mode selection in the H.264 coding process, and reducing the MPEG-2 to H.264 video transcoding time, i.e. improving the MPEG-2 to H.264 video transcoding efficiency.

The embodiment of the present application discloses a transcoding method and device. The method includes: selecting the first definition and the second definition from multiple levels of definition, and determining the The first resolution and the second resolution; according to the first and second resolutions, the first part of the content of the media file is transcoded according to the preset transcoding rules, and the first real-time quantization parameter value and the second quantization parameter value during the transcoding process are recorded. Two real-time quantization parameter values; judging whether the first real-time quantization parameter value and the second real-time quantization parameter value conform to the preset detection rule; if the judgment result is no, adjust the first resolution and / or adjust the second resolution; according to the adjusted Transcode the non-transcoded portion of the media file at the first resolution and / or the second resolution. The transcoding method and device provided in the embodiments of the present application can improve the transcoding speed of media files.

The invention discloses a video file processing method, device, video server and system, belonging to the technical field of communication. The method includes: acquiring a video file, dividing the video file into at least two video sub-files; sending the at least two video sub-files to a transcoding service unit for transcoding respectively, and obtaining at least two transcoding service A transcoded video subfile of the unit; a transcoded video file is obtained according to the at least two transcoded video subfiles. In the present invention, the entire video file is divided into multiple video sub-files for transcoding respectively. When a video sub-file fails to be transcoded, it will not affect the transcoding of other video sub-files. Just transcoding, no need to re-transcode the entire video file, which greatly shortens the transcoding time of the video file.

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.

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.

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.

An optimized video transcoding method from AVS to HEVC based on support vector machine, by collecting the feature vector of AVS code stream, and using the support vector machine to learn it and obtain the training model, the extracted AVS feature vector is divided into HEVC The CU at the corresponding position in the CU can be divided or not divided into two categories. In the transcoding stage, the training model is used to predict whether the CU needs to be divided. When the current CU needs to be divided, the 2N×2N mode and the SKIP mode are calculated at the current HEVC depth. , and select the optimal prediction mode from these two modes. When it is predicted that the current CU does not need to be divided, the optimal mode selection is performed according to the HEVC standard encoding process. The present invention combines the basic idea of ​​machine learning, divides the entire transcoding process into a training phase and a transcoding phase, obtains a training model through learning, predicts the division of CUs in HEVC, and combines the fast mode selection algorithm to improve the speed of transcoding , and ensure the overall video quality of the transcoded video.

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.

The present invention provides a H.265 fast transcoding method based on the number of code stream bits and block division mapping, fully utilizes the information in the input code stream to guide H.265 encoding, reduces the calculation amount of block division and mode selection, and The transcoding time is greatly shortened, and the subjective and objective visual quality of the transcoded video is also guaranteed. The code stream format of the present invention is not limited to H.265 isomorphic transcoding, and the technology will support H.264 / AVC or H.263++, and even earlier heterogeneous transcoding of MPGE standards.

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.

The application discloses a video file segmentation method and a distributed transcoding method. The video file segmentation method for distributed transcoding includes: receiving a source file; demultiplexing the received source file to obtain a video file and an audio file; dividing the video file in units of GOP to obtain segmentation After the video file; calculate the duration of the divided video file processed by a plurality of transcoding computers respectively; according to the calculated duration of the divided video file processed by each transcoding computer, divide the divided video The file is calculated; and according to the calculation result, the divided video file is sent to the corresponding transcoding computer. The video file segmentation method and distributed transcoding method proposed in this application enable each transcoding computer to complete the transcoding operation at the same time as possible, save transcoding time, and improve the transcoding efficiency of distributed transcoding.