First, the bad news: WebChimera doesn't look like it will work for now. It is flaky and just crashes the renderer process about 50% of the time I try to play a video. Good news: we might not need WebChimera. I figured out how to recompile electron and libchromiumcontent with different flags. If we compile in Chromecast mode (ie, like Chrome for Chromecast), it should support AC3 and DTS in the standard and tags. More bad news: I can't even reproduce the original problem, where a video plays but the audio doesn't.
This version of Tears of Steel is an MP4 with AC3-encoded audio, so it should play video-only with muted audio, but for me that doesn't play at all, not even the video. Magnet:?xt=urn:btih:16c57728d7e5143d69a4f646165c51&dn=tears-of-steel-ac3.mp4&tr=udp%3A%2F%2Fexodus.desync.com%3A6969&tr=wss%3A%2F%2Ftracker.webtorrent.io Does anyone have a video where only the audio track is broken?
Must be copyleft / freely shareable. First, the bad news: WebChimera doesn't look like it will work for now. It is flaky and just crashes the renderer process about 50% of the time I try to play a video. Good news: we might not need WebChimera. I figured out how to recompile electron and libchromiumcontent with different flags. If we compile in Chromecast mode (ie, like Chrome for Chromecast), it should support AC3 and DTS in the standard and tags.
More bad news: I can't even reproduce the original problem, where a video plays but the audio doesn't. This version of Tears of Steel is an MP4 with AC3-encoded audio, so it should play video-only with muted audio, but for me that doesn't play at all, not even the video. Magnet:?xt=urn:btih:16c57728d7e5143d69a4f646165c51&dn=tears-of-steel-ac3.mp4&tr=udp%3A%2F%2Fexodus.desync.com%3A6969&tr=wss%3A%2F%2Ftracker.webtorrent.io Does anyone have a video where only the audio track is broken? Must be copyleft / freely shareable.
WebTorrent Desktop app is a native app designed for Mac, Windows, and Linux. Why WebTorrent Desktop don't use FFMPEG for decoding media formats?
FFMPEG can be compiled for Mac, Windows, and Linux. FFMPEG is very interesting because it is a free and open source library that supports almost any media codec and media container. Adding native compiled binaries to the project may be not a good idea, but as I said before, WebTorrent Desktop is a not true platform independent software, because it uses Electron that supports only Mac, Windows, and Linux. BTW, one crazy idea just came to my mind! FFMPEG is not written in JavaScript.
Luckily, there is a project called Emscripten. Emscripten is a source-to-source compiler that runs as a back end to the LLVM compiler and produces a highly-optimizable subset of JavaScript known as asm.js that runs at near-native speed. Using Emscripten, it is possible to compile C and C code into JS and compile any other code that can be translated into LLVM bytecode into JS.
So it is possible to compile FFMPEG into JS. And looks like it is possible to use FFMPEG compiled into JS as a media codec and/or media container polyfill for the HTML5 / tag in a web browser to decode or realtime (on-the-fly) transcode formats that not software/hardware supported (without needing to download the entire media file before it can start playing). At least for audio only due to performance limitations.
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Example 1: There is a test.htm page with tag, test.opus file encoded using Opus audio codec, but the web browser doesn't support Opus. The polyfill decodes test.opus to uncompressed test.wav (and change the tag to ). Example 2: There is a test.htm page with tag, test.mp4 file encoded using H.264 video codec and AC3 audio codec, but the web browser doesn't support AC3.
The polyfill decodes only AC3 audio to uncompressed audio data (PCM) (that supported by the browser) (and optionally encodes the uncompressed audio data to AAC that also supported by the browser), but not decode H.264 video (that supported by the browser natively). The polyfill produces fully working media file in the media container that supported by the browser (e.g.
MP4/MKV) with video stream encoded using video codec that supported by the browser (H.264) and audio stream encoded using audio codec that supported by the browser (PCM/AAC). See the following interesting projects that I've found on GitHub: BTW, look at this awesome asm.js demo:;) BTW, have you heard anything about WebAssembly? WebAssembly is a new binary format for the web. It will be used for performance critical code and to compile any (LLVM-based) programming language other than JavaScript (initially mainly C/C) directly to run on the web. It can be seen as a next step for asm.js. WebAssembly is being developed in a W3C Community Group. It's the standard of the future web!
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See the following article for more details:. So it is possible to compile FFMPEG directly into WebAssembly. There are experimental native WebAssembly implementations for Google Chrome, Mozilla Firefox, Microsoft Edge and Apple Safari.
BTW, look at this awesome WebAssembly demo:;) Seems it is possible to use WebAssembly in Node.js (built on V8 that supports WebAssembly) and in Electron (built on V8, Node.js and Chromium).:). WebTorrent Desktop app is a native app designed for Mac, Windows, and Linux. Why WebTorrent Desktop don't use FFMPEG for decoding media formats? FFMPEG can be compiled for Mac, Windows, and Linux. FFMPEG is very interesting because it is a free and open source library that supports almost any media codec and media container. Adding native compiled binaries to the project may be not a good idea, but as I said before, WebTorrent Desktop is a not true platform independent software, because it uses Electron that supports only Mac, Windows, and Linux.
BTW, one crazy idea just came to my mind! FFMPEG is not written in JavaScript. Luckily, there is a project called Emscripten.
Emscripten is a source-to-source compiler that runs as a back end to the LLVM compiler and produces a highly-optimizable subset of JavaScript known as asm.js that runs at near-native speed. Using Emscripten, it is possible to compile C and C code into JS and compile any other code that can be translated into LLVM bytecode into JS. So it is possible to compile FFMPEG into JS. And looks like it is possible to use FFMPEG compiled into JS as a media codec and/or media container polyfill for the HTML5 / tag in a web browser to decode or realtime (on-the-fly) transcode formats that not software/hardware supported (without needing to download the entire media file before it can start playing). At least for audio only due to performance limitations. Sunset overdrive pc download kickass.
Example 1: There is a test.htm page with tag, test.opus file encoded using Opus audio codec, but the web browser doesn't support Opus. The polyfill decodes test.opus to uncompressed test.wav (and change the tag to ). Example 2: There is a test.htm page with tag, test.mp4 file encoded using H.264 video codec and AC3 audio codec, but the web browser doesn't support AC3. The polyfill decodes only AC3 audio to uncompressed audio data (PCM) (that supported by the browser) (and optionally encodes the uncompressed audio data to AAC that also supported by the browser), but not decode H.264 video (that supported by the browser natively). The polyfill produces fully working media file in the media container that supported by the browser (e.g. MP4/MKV) with video stream encoded using video codec that supported by the browser (H.264) and audio stream encoded using audio codec that supported by the browser (PCM/AAC). See the following interesting projects that I've found on GitHub: BTW, look at this awesome asm.js demo:;) BTW, have you heard anything about WebAssembly?
WebAssembly is a new binary format for the web. It will be used for performance critical code and to compile any (LLVM-based) programming language other than JavaScript (initially mainly C/C) directly to run on the web.
It can be seen as a next step for asm.js. WebAssembly is being developed in a W3C Community Group. It's the standard of the future web! See the following article for more details:. So it is possible to compile FFMPEG directly into WebAssembly. There are experimental native WebAssembly implementations for Google Chrome, Mozilla Firefox, Microsoft Edge and Apple Safari.
BTW, look at this awesome WebAssembly demo:;) Seems it is possible to use WebAssembly in Node.js (built on V8 that supports WebAssembly) and in Electron (built on V8, Node.js and Chromium).:). Electron actually already includes ffmpeg since it's required by Chromium. The cleanest way to add support would be if Chromium added support for additional codecs to the video tag. That's why I opened this issue: Second best approach, IMO, is to change the ffmpeg build used by Electron to be able to play back more codecs.
Or, to include something like an emscripten'ed version of ffmpeg to convert video. But things get tricky if we want to support seeking. I don't know how that works with ffmpeg.
Can it convert from the middle of a video? Would we need to feed it a complete video segment - and therefore need to understand all the different container formats, mkv, webm, mp4, etc.? Starts to look like a lot less clean of a solution. Electron actually already includes ffmpeg since it's required by Chromium. The cleanest way to add support would be if Chromium added support for additional codecs to the video tag. That's why I opened this issue: Second best approach, IMO, is to change the ffmpeg build used by Electron to be able to play back more codecs. Or, to include something like an emscripten'ed version of ffmpeg to convert video.
But things get tricky if we want to support seeking. I don't know how that works with ffmpeg.
Can it convert from the middle of a video? Would we need to feed it a complete video segment - and therefore need to understand all the different container formats, mkv, webm, mp4, etc.? Starts to look like a lot less clean of a solution.
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Provides Complete Capabilities The Dolby® Media Producer Suite covers all facets of encoding and decoding disc and digital delivery audio. Dolby Atmos ® is now supported by the Dolby Media Producer applications in this suite. The suite provides professional, non-real-time encoding for Dolby TrueHD, Dolby Digital Plus™, Dolby Digital, and MLP Lossless™ for DVD Audio. The Dolby Media Producer Decoder decodes all consumer-encoded files that are used to author Blu-ray Disc ™ as well as the Dolby Digital Plus files that current file-based deliveries require.
TEAM V.R Jan 09 2018 2.9 MB The SurCode for Dolby Digital 5.1 surround encoder for Adobe’s Creative Cloud is tightly integrated with Adobe Creative Cloud. The SurCode for Dolby Digital encoder is available as a Trial Version on request. Now, both MPEG-2 and H.264 video, with AC-3 or E-AC-3 surround, or stereo audio, can be encoded and multiplexed simultaneously within Adobe’s latest release of its flagship content creation package. SurCode for Dolby Digital 5.1 Encoder for Adobe CC Windows Mac OS Adobe’s Creative Cloud with SurCode for Dolby Digital enables video and audio editors to seamlessly access the full set of professional Dolby Digital encoder options. From right within Adobe® Premiere® Pro CC, 5.1 Dolby Digital or Dolby Digital Plus streams can be encoded directly within your surround mixing environment and is included in your DVD or Blu-ray authoring project. The trial version provides full functionality for 14 days before activation is required. At a great price, this is an easy entry into full featured DVD and BD title creation.
Features:.Tightly integrated into Adobe’s products.Fully certified & licensed by Dolby Laboratories, Inc.Encodes 5.1 surround or 2.0 stereo into a Dolby Digital (AC-3) or Dolby Digital Plus (E-AC-3 file.Accepts up to six WAV or AIFF files as input.Supports all Dolby encoding options.Activation: Web-based, instant product authorization.
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