Basic knowledge of audio and video development YUV color coding
Generally speaking, we usually contact with the color coding is RGB, such as most of the display is RGB, usually do development in the program...
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Tag: Video coding
Bit rate control (II) : DETAILS of CRF
February 5, 2024
by Olivia Smith
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Constant Rate Factor (CRF) has been introduced in the previous article. This article further introduces the principle of CRF. CRF is the default bitrate control...
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Paileyun based on AV1 real-time video system technology practice
February 5, 2024
by Garrett Marks
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Leyun Pano, chief scientist & partner -- Zhang Qi, delivered a speech at LiveVideoStackCon 2021 in Beijing.
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Explore the broadcast control system behind the opening ceremony of the Winter Olympics
February 5, 2024
by Thomas Smith
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On February 4, 2022, at 8pm, a magnificent opening ceremony of the Winter Olympics arrived as promised. As the broadcast control system of the opening...
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Codec reevolution: Ali266 and the next generation of video technology
February 5, 2024
by Tiffany Blake
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The past year has seen a once-in-a-century event, as well as the proliferation of video applications. The resulting explosion of video data volumes has intensified...
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Inter-frame prediction (III) Symmetric MVD Mode
February 5, 2024
by 張宜君
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The Symmetric MVD mode is a new bidirectional prediction mode for MVD syntactic unit transmission in VVC. When using symmetric MVD mode, the index of...
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Loop filtering (5) : SAO
February 5, 2024
by Amy Smith
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Sample Adaptive Offset (SAO) is used to eliminate ringing effect. Ringing effect is due to the quantization distortion of high frequency AC coefficient, which will...
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RTMP live broadcast server construction method
February 5, 2024
by 王怡萱
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Background Due to the learning needs, the live streaming push and pull servers are built on centos7 server, mainly based on the open source service...
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Netty series: Base64 encoders in Java
February 5, 2024
by Carly Phillips
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What is Base64 encoding? Before we answer this question, we need to understand the classification of files on computers. For computers, files can be divided...
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AttributeError: ‘SupervisedDataSet’ object has no attribute ‘_convertToOneOfMany’
January 31, 2024
by Amy Broughan
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Cov = [diag ([1, 1]), diag ([0.5, 1.2]), diag ([1.5, 0. Alldata tstdata, Trndata = alldata. SplitWithProportion (0. Trndata. Tstdata. Alldata in code is defined...
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Python3 UnicodeEncodeError: ‘GBK’ codec can’t encode character ‘\xXX’ in position XX python3 UnicodeEncodeError: ‘GBK’ codec can’t encode character ‘\xXX’ in position XX
January 31, 2024
by Debra Hill
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import urllib.import http.sys.stdout = io.TextIOWrapper(sys.stdout.'Accept':'text/html,application/xhtml+xml,application/xml; Q = 0.9, image/web...
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H.265/HEVC intra-frame prediction coding
January 31, 2024
by Ella Harrison
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As mentioned above, both images and videos have strong spatial correlation, that is to say, the pixel value of a pixel is very close to...
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Low latency high sound quality: packet loss, jitter and last Mile optimization
January 24, 2024
by Sarah Carter
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This is the third technical sharing in our series on low latency and high sound Quality. This time we will zoom in and talk about...
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Soft and hard integration of algorithm practice, how ali Cloud algorithm to achieve scene “re-innovation”?
January 24, 2024
by Dr. Carol Jones
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The new scene of audio and video consumption has given rise to more and more new technical requirements. From the current live broadcast, on-demand, RTC,...
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Practice of Weak Net Counter after Soundnet 2020 Real Time Conference
January 24, 2024
by Alia Andra
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Voip Voip is a real-time video call technology that implements voice, video, and multimedia meetings over the Internet.
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Detailed explanation of low delay high sound quality: codec
January 22, 2024
by Vanessa Tapp
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Voice networking has been around for decades, but the recent "interactive podcasting" scene has put audio interaction back in the spotlight. How to provide a...
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TCSVT2020: Low power motion estimation of HEVC based on novel SAD calculation
January 17, 2024
by Todd Payne
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In HEVC, motion estimation (ME) is the most power consuming part of the encoder, while SAD takes up 50% of the power consumption of ME....
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H.266/VVC standard text
January 17, 2024
by Nicole Bradshaw
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H.266/VVC will be finalized in July 2020. The same image quality will save nearly 50% more transmission traffic than H.265/HEVC, the higher the resolution, the...
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Lib /libpng16.so.16: undefined reference to ‘inflateValidate@ZLIB_1.2.9’
January 17, 2024
by Steven Goodwin
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/ / home/ubuntu/anaconda3 / lib/libpng16. So. 16: undefined reference to ` inflateValidate@ZLIB_1.2. Workaround: In Makefile.
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The laptop keyboard trackpad suddenly all failed, and the external keyboard didn’t work
January 17, 2024
by Kismat Kant
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Laptop the night before the use of good, the next day when the boot input password suddenly can not be input. But the mouse still...
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Python3.6 (numpy, scipy, pandas, matplotlib, scikit-learn)
January 17, 2024
by Richard Maxwell
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I have been using Python for nearly a year, using Python 3.4, and recently wanted to upgrade my Python environment to the latest Python 3....
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Use FFMPEG to draw the motion vector MV
January 17, 2024
by Mehul Shan
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This paper will use FFMPEG to extract the motion vector MV of each frame of video, and use OpencV to draw it out. Anyone familiar...
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SPS parameter set
January 16, 2024
by 金淑貞
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A video contains one or more encoded video sequences CVS, each with an SPS that all reference the same VPS. The sequence parameter set SPS...
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Data structure of CU in HM
January 16, 2024
by Martyn Williams
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HM is the official reference software for H.265/HEVC, which is a block-based hybrid coding standard that divides quadtree in CTU units. The maximum CTU specified...
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VVC interframe prediction (5) SbTMVP and AMVR
January 16, 2024
by Wendy Carr
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Subblock-based Temporal Motion Vector Prediction (SbTMVP) proposed in VTM is similar to TMVP in HEVC. TMVP calculation method can refer to the construction of time...
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Scikit-video Reads and writes videos
January 15, 2024
by Marion Johnson
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Skvideo. IO uses FFmpeg/LibAV as the back-end video read and write module. Using the available backend, it parses the video metadata with the appropriate probe...
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Audio and video learning – practice related to weak net countermeasure technology
January 12, 2024
by Jessica Cameron
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Real-time audio and video calls are used all the time in our daily life, including social communication, security, and transportation. Complex user scenarios, stringent requirements,...
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Audio and video codec – coding parameter CRF
January 11, 2024
by 鄧美琪
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CRF (Constant Rate Factor) is an encoding mode that adjusts the file data Rate up or down to a selected level of quality, rather than...
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spark Exception in thread “main” java.lang.IllegalArgumentException: java.net.URISyntaxException: Re
January 7, 2024
by Jeremy Ward
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Run on Windows spark2. Exception in the thread "is the main" Java. Lang. IllegalArgumentException: java.net... When spark SQL is used, you need to specify the...
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Learning-based coding (VI) : DRNLF
January 7, 2024
by Ivana Behl
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The algorithm in this paper comes from JVEt-L0242. The dense Residual network Based In-loop Filter (DRNLF) is used in the loop filtering of VTM, after...
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