Download Webm Codec Windows 10 Webm: an Open Web Media Project
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Representasi Dan Kompresi Data Citra Bergerak.Pdf
Sistem Multimedia “ Representasi dan Kompresi Data Citra Bergerak ” Oleh : Farhat, ST, MMSI, MSc { Diolah dari berbagai Sumber } Farhat, ST., MMSI., MSc Sistem Multimedia Universitas Gunadarma PEMBAHASAN 2.1 Pengertian Kompressing Dalam ilmu komputer dan teori informasi , kompresi data atau sumber pengkodean adalah proses encoding informasi dengan menggunakan lebih sedikit bit (atau unit informasi-bantalan lainnya) dari sebuah unencoded representasi akan menggunakan, melalui penggunaan khusus pengkodean skema. Dalam komputasi, deduplication data adalah teknik kompresi data khusus untuk menghilangkan data-grained berlebihan kasar, biasanya untuk meningkatkan utilisasi storage. Seperti komunikasi apapun, dikompresi komunikasi data hanya bekerja jika kedua pengirim dan penerima informasi memahami skema pengkodean. Misalnya, teks ini masuk akal hanya jika penerima mengerti bahwa itu adalah dimaksudkan untuk ditafsirkan sebagai karakter yang mewakili bahasa InggrisDemikian pula, data terkompresi hanya dapat dipahami jika metode decoding diketahui oleh penerima. Kompresi berguna karena membantu mengurangi konsumsi sumber daya mahal, seperti hard disk space atau transmisi bandwidth . Pada sisi negatifnya, data dikompresi harus didekompresi untuk digunakan, dan ini pengolahan tambahan mungkin merugikan beberapa aplikasi. Sebagai contoh, skema kompresi untuk video mungkin memerlukan perangkat keras mahal untuk video yang akan didekompresi cukup cepat untuk dilihat karena sedang decompressed (pilihan untuk dekompresi video secara penuh sebelum -
Thumbor-Video-Engine Release 1.2.2
thumbor-video-engine Release 1.2.2 Aug 14, 2021 Contents 1 Installation 3 2 Setup 5 2.1 Contents.................................................6 2.2 License.................................................. 13 2.3 Indices and tables............................................ 13 i ii thumbor-video-engine, Release 1.2.2 thumbor-video-engine provides a thumbor engine that can read, crop, and transcode audio-less video files. It supports input and output of animated GIF, animated WebP, WebM (VP9) video, and MP4 (default H.264, but HEVC is also supported). Contents 1 thumbor-video-engine, Release 1.2.2 2 Contents CHAPTER 1 Installation pip install thumbor-video-engine Go to GitHub if you need to download or install from source, or to report any issues. 3 thumbor-video-engine, Release 1.2.2 4 Chapter 1. Installation CHAPTER 2 Setup In your thumbor configuration file, change the ENGINE setting to 'thumbor_video_engine.engines. video' to enable video support. This will allow thumbor to support video files in addition to whatever image formats it already supports. If the file passed to thumbor is an image, it will use the Engine specified by the configuration setting IMAGING_ENGINE (which defaults to 'thumbor.engines.pil'). To enable transcoding between formats, add 'thumbor_video_engine.filters.format' to your FILTERS setting. If 'thumbor.filters.format' is already present, replace it with the filter from this pack- age. ENGINE = 'thumbor_video_engine.engines.video' FILTERS = [ 'thumbor_video_engine.filters.format', 'thumbor_video_engine.filters.still', ] To enable automatic transcoding to animated gifs to webp, you can set FFMPEG_GIF_AUTO_WEBP to True. To use this feature you cannot set USE_GIFSICLE_ENGINE to True; this causes thumbor to bypass the custom ENGINE altogether. -
The Interplay of Compile-Time and Run-Time Options for Performance Prediction Luc Lesoil, Mathieu Acher, Xhevahire Tërnava, Arnaud Blouin, Jean-Marc Jézéquel
The Interplay of Compile-time and Run-time Options for Performance Prediction Luc Lesoil, Mathieu Acher, Xhevahire Tërnava, Arnaud Blouin, Jean-Marc Jézéquel To cite this version: Luc Lesoil, Mathieu Acher, Xhevahire Tërnava, Arnaud Blouin, Jean-Marc Jézéquel. The Interplay of Compile-time and Run-time Options for Performance Prediction. SPLC 2021 - 25th ACM Inter- national Systems and Software Product Line Conference - Volume A, Sep 2021, Leicester, United Kingdom. pp.1-12, 10.1145/3461001.3471149. hal-03286127 HAL Id: hal-03286127 https://hal.archives-ouvertes.fr/hal-03286127 Submitted on 15 Jul 2021 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. The Interplay of Compile-time and Run-time Options for Performance Prediction Luc Lesoil, Mathieu Acher, Xhevahire Tërnava, Arnaud Blouin, Jean-Marc Jézéquel Univ Rennes, INSA Rennes, CNRS, Inria, IRISA Rennes, France [email protected] ABSTRACT Both compile-time and run-time options can be configured to reach Many software projects are configurable through compile-time op- specific functional and performance goals. tions (e.g., using ./configure) and also through run-time options (e.g., Existing studies consider either compile-time or run-time op- command-line parameters, fed to the software at execution time). -
Microsoft Powerpoint
Development of Multimedia WebApp on Tizen Platform 1. HTML Multimedia 2. Multimedia Playing with HTML5 Tags (1) HTML5 Video (2) HTML5 Audio (3) HTML Pulg-ins (4) HTML YouTube (5) Accessing Media Streams and Playing (6) Multimedia Contents Mgmt (7) Capturing Images 3. Multimedia Processing Web Device API Multimedia WepApp on Tizen - 1 - 1. HTML Multimedia • What is Multimedia ? − Multimedia comes in many different formats. It can be almost anything you can hear or see. − Examples : Pictures, music, sound, videos, records, films, animations, and more. − Web pages often contain multimedia elements of different types and formats. • Multimedia Formats − Multimedia elements (like sounds or videos) are stored in media files. − The most common way to discover the type of a file, is to look at the file extension. ⇔ When a browser sees the file extension .htm or .html, it will treat the file as an HTML file. ⇔ The .xml extension indicates an XML file, and the .css extension indicates a style sheet file. ⇔ Pictures are recognized by extensions like .gif, .png and .jpg. − Multimedia files also have their own formats and different extensions like: .swf, .wav, .mp3, .mp4, .mpg, .wmv, and .avi. Multimedia WepApp on Tizen - 2 - 2. Multimedia Playing with HTML5 Tags (1) HTML5 Video • Some of the popular video container formats include the following: Audio Video Interleave (.avi) Flash Video (.flv) MPEG 4 (.mp4) Matroska (.mkv) Ogg (.ogv) • Browser Support Multimedia WepApp on Tizen - 3 - • Common Video Format Format File Description .mpg MPEG. Developed by the Moving Pictures Expert Group. The first popular video format on the MPEG .mpeg web. -
Screen Capture Tools to Record Online Tutorials This Document Is Made to Explain How to Use Ffmpeg and Quicktime to Record Mini Tutorials on Your Own Computer
Screen capture tools to record online tutorials This document is made to explain how to use ffmpeg and QuickTime to record mini tutorials on your own computer. FFmpeg is a cross-platform tool available for Windows, Linux and Mac. Installation and use process depends on your operating system. This info is taken from (Bellard 2016). Quicktime Player is natively installed on most of Mac computers. This tutorial focuses on Linux and Mac. Table of content 1. Introduction.......................................................................................................................................1 2. Linux.................................................................................................................................................1 2.1. FFmpeg......................................................................................................................................1 2.1.1. installation for Linux..........................................................................................................1 2.1.1.1. Add necessary components........................................................................................1 2.1.2. Screen recording with FFmpeg..........................................................................................2 2.1.2.1. List devices to know which one to record..................................................................2 2.1.2.2. Record screen and audio from your computer...........................................................3 2.2. Kazam........................................................................................................................................4 -
Pre-Roll & Mid-Roll Video
Pre-roll & Mid-roll Video 1/2 THIRD PARTY ALL ASSETS BELOW ARE REQUIRED VAST SPECIFICATIONS TO BE PRESENT IN THE VAST TAG Not available for live stream sponsorships or feature sponsorships. All assets for sponsored Bit rate Codecs accepted Min dimensions Max file size Use cases content must use the "Network 10 Hosted Video In-Stream Ad with Companion" specifications. Mezzanine File 15–30 Mbps H.264 1920x1080 1.7 GB Required for SSAI Aspect ratio Format (High profile) Environments 16:9 Video will auto-scale correctly Frame Rate: 24 :15 – 4.5MB High Codec Constant frame rate only 2,100 kbps H.264 Mezzanine File - .mov +/- 50 kbps (High profile) 1024x576 :30 – 9MB bandwidth (H.264 High Profile) No de-interlacing with :18 – 18MB users no frame blending mp4 (high profile) :15 – 3.5MB Standard asset Remove any pull-down 1,500 kbps H.264 +/- 50 kbps (High profile) 960x540 :30 – 7MB for most users webm (VP8 or VP9) added for broadcast :18 – 14MB and pre roll Duration Audio :15 – 1MB Low 750 kbps H.264 768x432 :30 – 2MB bandwidth Network 10 accepts a variety of length Mezzanine file: 2 Channels only, AAC +/- 50 kbps (High profile) :18 – 4MB users creatives, standards include :6*, :15, :30, Codec, 192 KBPS minimum, 16 or 24 bit Available on :60*, :90*. only, 48 kHz Sample Rate. :15 – 4.5MB High 375 kbps H.264 Any tag submitted must contain creative mp4 assets: 2 Channels only, AAC Codec, +/- 50 kbps (High profile) 640x360 :30 – 9MB bandwidth of all the same length. 192 KBPS minimum, 16 or 24 bit only, 48 :18 – 18MB users kHz Sample Rate. -
Opus, a Free, High-Quality Speech and Audio Codec
Opus, a free, high-quality speech and audio codec Jean-Marc Valin, Koen Vos, Timothy B. Terriberry, Gregory Maxwell 29 January 2014 Xiph.Org & Mozilla What is Opus? ● New highly-flexible speech and audio codec – Works for most audio applications ● Completely free – Royalty-free licensing – Open-source implementation ● IETF RFC 6716 (Sep. 2012) Xiph.Org & Mozilla Why a New Audio Codec? http://xkcd.com/927/ http://imgs.xkcd.com/comics/standards.png Xiph.Org & Mozilla Why Should You Care? ● Best-in-class performance within a wide range of bitrates and applications ● Adaptability to varying network conditions ● Will be deployed as part of WebRTC ● No licensing costs ● No incompatible flavours Xiph.Org & Mozilla History ● Jan. 2007: SILK project started at Skype ● Nov. 2007: CELT project started ● Mar. 2009: Skype asks IETF to create a WG ● Feb. 2010: WG created ● Jul. 2010: First prototype of SILK+CELT codec ● Dec 2011: Opus surpasses Vorbis and AAC ● Sep. 2012: Opus becomes RFC 6716 ● Dec. 2013: Version 1.1 of libopus released Xiph.Org & Mozilla Applications and Standards (2010) Application Codec VoIP with PSTN AMR-NB Wideband VoIP/videoconference AMR-WB High-quality videoconference G.719 Low-bitrate music streaming HE-AAC High-quality music streaming AAC-LC Low-delay broadcast AAC-ELD Network music performance Xiph.Org & Mozilla Applications and Standards (2013) Application Codec VoIP with PSTN Opus Wideband VoIP/videoconference Opus High-quality videoconference Opus Low-bitrate music streaming Opus High-quality music streaming Opus Low-delay -
Encoding H.264 Video for Streaming and Progressive Download
W4: KEY ENCODING SKILLS, TECHNOLOGIES TECHNIQUES STREAMING MEDIA EAST - 2019 Jan Ozer www.streaminglearningcenter.com [email protected]/ 276-235-8542 @janozer Agenda • Introduction • Lesson 5: How to build encoding • Lesson 1: Delivering to Computers, ladder with objective quality metrics Mobile, OTT, and Smart TVs • Lesson 6: Current status of CMAF • Lesson 2: Codec review • Lesson 7: Delivering with dynamic • Lesson 3: Delivering HEVC over and static packaging HLS • Lesson 4: Per-title encoding Lesson 1: Delivering to Computers, Mobile, OTT, and Smart TVs • Computers • Mobile • OTT • Smart TVs Choosing an ABR Format for Computers • Can be DASH or HLS • Factors • Off-the-shelf player vendor (JW Player, Bitmovin, THEOPlayer, etc.) • Encoding/transcoding vendor Choosing an ABR Format for iOS • Native support (playback in the browser) • HTTP Live Streaming • Playback via an app • Any, including DASH, Smooth, HDS or RTMP Dynamic Streaming iOS Media Support Native App Codecs H.264 (High, Level 4.2), HEVC Any (Main10, Level 5 high) ABR formats HLS Any DRM FairPlay Any Captions CEA-608/708, WebVTT, IMSC1 Any HDR HDR10, DolbyVision ? http://bit.ly/hls_spec_2017 iOS Encoding Ladders H.264 HEVC http://bit.ly/hls_spec_2017 HEVC Hardware Support - iOS 3 % bit.ly/mobile_HEVC http://bit.ly/glob_med_2019 Android: Codec and ABR Format Support Codecs ABR VP8 (2.3+) • Multiple codecs and ABR H.264 (3+) HLS (3+) technologies • Serious cautions about HLS • DASH now close to 97% • HEVC VP9 (4.4+) DASH 4.4+ Via MSE • Main Profile Level 3 – mobile HEVC (5+) -
Arxiv:2007.15943V1 [Cs.SE] 31 Jul 2020
MUZZ: Thread-aware Grey-box Fuzzing for Effective Bug Hunting in Multithreaded Programs Hongxu Chen§† Shengjian Guo‡ Yinxing Xue§∗ Yulei Sui¶ Cen Zhang† Yuekang Li† Haijun Wang# Yang Liu† †Nanyang Technological University ‡Baidu Security ¶University of Technology Sydney §University of Science and Technology of China #Ant Financial Services Group Abstract software performance. A typical computing paradigm of mul- tithreaded programs is to accept a set of inputs, distribute Grey-box fuzz testing has revealed thousands of vulner- computing jobs to threads, and orchestrate their progress ac- abilities in real-world software owing to its lightweight cordingly. Compared to sequential programs, however, multi- instrumentation, fast coverage feedback, and dynamic adjust- threaded programs are more prone to severe software faults. ing strategies. However, directly applying grey-box fuzzing On the one hand, the non-deterministic thread-interleavings to input-dependent multithreaded programs can be extremely give rise to concurrency-bugs like data-races, deadlocks, inefficient. In practice, multithreading-relevant bugs are usu- etc [32]. These bugs may cause the program to end up with ab- ally buried in the sophisticated program flows. Meanwhile, normal results or unexpected hangs. On the other hand, bugs existing grey-box fuzzing techniques do not stress thread- that appear under specific inputs and interleavings may lead interleavings that affect execution states in multithreaded pro- to concurrency-vulnerabilities [5, 30], resulting in memory grams. Therefore, mainstream grey-box fuzzers cannot ade- corruptions, information leakage, etc. quately test problematic segments in multithreaded software, although they might obtain high code coverage statistics. There exist a line of works on detecting bugs and vulner- To this end, we propose MUZZ, a new grey-box fuzzing abilities in multithreaded programs. -
Google Chrome Browser Dropping H.264 Support 14 January 2011, by John Messina
Google Chrome Browser dropping H.264 support 14 January 2011, by John Messina with the codecs already supported by the open Chromium project. Specifically, we are supporting the WebM (VP8) and Theora video codecs, and will consider adding support for other high-quality open codecs in the future. Though H.264 plays an important role in video, as our goal is to enable open innovation, support for the codec will be removed and our resources directed towards completely open codec technologies." Since Google is developing the WebM technology, they can develop a good video standard using open source faster and better than a current standard video player can. The problem with H.264 is that it cost money and On January 11, Google announced that Chrome’s the patents for the technologies in H.264 are held HTML5 video support will change to match codecs by 27 companies, including Apple and Microsoft supported by the open source Chromium project. and controlled by MPEG LA. This makes H.264 Chrome will support the WebM (VP8) and Theora video expensive for content owners and software makers. codecs, and support for the H.264 codec will be removed to allow resources to focus on open codec Since Apple and Microsoft hold some of the technologies. patents for the H.264 technology and make money off the licensing fees, it's in their best interest not to change the technology in their browsers. (PhysOrg.com) -- Google will soon stop supporting There is however concerns that Apple and the H.264 video codec in their Chrome browser Microsoft's lack of support for WebM may impact and will support its own WebM and Ogg Theora the Chrome browser. -
IP-Soc Shanghai 2017 ALLEGRO Presentation FINAL
Building an Area-optimized Multi-format Video Encoder IP Tomi Jalonen VP Sales www.allegrodvt.com Allegro DVT Founded in 2003 Privately owned, based in Grenoble (France) Two product lines: 1) Industry de-facto standard video compliance streams Decoder syntax, performance and error resilience streams for H.264|MVC, H.265/SHVC, VP9, AVS2 and AV1 System compliance streams 2) Leading semiconductor video IP Multi-format encoder IP for H.264, H.265, VP9, JPEG Multi-format decoder IP for H.264, H.265, VP9, JPEG WiGig IEEE 802.11ad WDE CODEC IP 2 Evolution of Video Coding Standards International standards defined by standardization bodies such as ITU-T and ISO/IEC H.261 (1990) MPEG-1 (1993) H.262 / MPEG-2 (1995) H.263 (1996) MPEG-4 Part 2 (1999) H.264 / AVC / MPEG-4 Part 10 (2003) H.265 / HEVC (2013) Future Video Coding (“FVC”) MPEG and ISO "Preliminary Joint Call for Evidence on Video Compression with Capability beyond HEVC.” (202?) Incremental improvements of transform-based & motion- compensated hybrid video coding schemes to meet the ever increasing resolution and frame rate requirements 3 Regional Video Standards SMPTE standards in the US VC-1 (2006) VC-2 (2008) China Information Industry Department standards AVS (2005) AVS+ (2012) AVS2.0 (2016) 4 Proprietary Video Formats Sorenson Spark On2 VP6, VP7 RealVideo DivX Popular in the past partly due to technical merits but mainly due to more suitable licensing schemes to a given application than standard video video formats with their patent royalties. 5 Royalty-free Video Formats Xiph.org Foundation -
Efficient Multi-Codec Support for OTT Services: HEVC/H.265 And/Or AV1?
Efficient Multi-Codec Support for OTT Services: HEVC/H.265 and/or AV1? Christian Timmerer†,‡, Martin Smole‡, and Christopher Mueller‡ ‡Bitmovin Inc., †Alpen-Adria-Universität San Francisco, CA, USA and Klagenfurt, Austria, EU ‡{firstname.lastname}@bitmovin.com, †{firstname.lastname}@itec.aau.at Abstract – The success of HTTP adaptive streaming is un- multiple versions (e.g., different resolutions and bitrates) and disputed and technical standards begin to converge to com- each version is divided into predefined pieces of a few sec- mon formats reducing market fragmentation. However, other onds (typically 2-10s). A client first receives a manifest de- obstacles appear in form of multiple video codecs to be sup- scribing the available content on a server, and then, the client ported in the future, which calls for an efficient multi-codec requests pieces based on its context (e.g., observed available support for over-the-top services. In this paper, we review the bandwidth, buffer status, decoding capabilities). Thus, it is state of the art of HTTP adaptive streaming formats with re- able to adapt the media presentation in a dynamic, adaptive spect to new services and video codecs from a deployment way. perspective. Our findings reveal that multi-codec support is The existing different formats use slightly different ter- inevitable for a successful deployment of today's and future minology. Adopting DASH terminology, the versions are re- services and applications. ferred to as representations and pieces are called segments, which we will use henceforth. The major differences between INTRODUCTION these formats are shown in Table 1. We note a strong differ- entiation in the manifest format and it is expected that both Today's over-the-top (OTT) services account for more than MPEG's media presentation description (MPD) and HLS's 70 percent of the internet traffic and this number is expected playlist (m3u8) will coexist at least for some time.