说明:
The unsung hero of video encoding - FFMPEG! You've probably used it (hidden behind some user interface), but today, we'll learn how to get to the root of it, and operate FFMPEG itself from the command line! == CONTENTS == 0:00 Introduction 1:43 Installation Notes 3:30 Basic Use 3:57 Example 1: Basic Video Conversion 5:11 Quality Controls 7:10 Bitrates & Specifying Streams (Audio or Video) 7:54 Command Summary 8:07 FFMPEG Filters / Common Use Cases 8:40 Filter 1: Volume Control 9:10 Filter 2: Audio Channel Remapping 9:47 Filter 3: Cropping 10:31 Filter 4: Video Scaling 11:02 Filter 5: Rotation 11:28 Conclusion Download FFMPEG: https://www.ffmpeg.org/download.html Download PeaZip: http://www.peazip.org/ Full FFMPEG Documentation: https://ffmpeg.org/ffmpeg.html FFMPEG Filter Documentation: https://ffmpeg.org/ffmpeg-filters.html All FFMPEG features: https://ffmpeg.org/documentation.html This video consists of three main parts - Installing FFMPEG, some fundamental notes about how it is used, as well as some filters and effects it supports. Its use can be extremely simple - By just supplying input and output file names and changing up their extensions, you can effortlessly convert from one format to another. Conversely, if you are looking to do more complex operations such as chroma keying (green screening) and filtering operations, FFMPEG can do it to! To do this, you will need to use Filtergraphs, a feature covered in another episode: https://www.youtube.com/watch?v=hElDsyuAQDA Additional Tip (Credit to Kitsune Ultima for sharing): To open a command line in any folder, simply type "cmd" in the address bar of your explorer window while viewing that folder, and the command prompt will load in the correct folder! = 0612 TV = 0612 TV, a sub-project of NERDfirst.net, is an educational YouTube channel. Started in 2008, we have now covered a wide range of topics, from areas such as Programming, Algorithms and Computing Theories, Computer Graphics, Photography, and Specialized Guides for using software such as FFMPEG, Deshaker, GIMP and more! Enjoy your stay, and don't hesitate to drop me a comment or a personal message to my inbox =) If you like my work, don't forget to subscribe! Like what you see? Buy me a coffee → http://www.nerdfirst.net/donate/ 0612 TV Official Writeup: https://www.nerdfirst.net/0612tv More about me: https://about.me/lcc0612 Official Twitter: http://twitter.com/0612tv = NERDfirst = NERDfirst is a project allowing me to go above and beyond YouTube videos into areas like app and game development. It will also contain the official 0612 TV blog and other resources. Watch this space, and keep your eyes peeled on this channel for more updates! http://nerdfirst.net/ ----- Disclaimer: Please note that any information is provided on this channel in good faith, but I cannot guarantee 100% accuracy / correctness on all content. Contributors to this channel are not to be held responsible for any possible outcomes from your use of the information.
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UDL Client(适用于 Windows)支持900多个网站、社交网络和视频托管网站的最强大解决方案。包括源中可用的任何视频质量。
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您可以使用网站或pwa应用程序 UDL Lite 将视频下载到智能手机上。也可以使用 UDL Helper 扩展通过二维码发送下载链接。
最方便的方法是使用UDL Client 程序,该程序支持将视频转换为MP3格式。在某些情况下,MP3 也可以通过 UDL Helper 扩展下载。
此功能在 UDL Helper 扩展中可用。确保在设置中选中“显示视频快照按钮”。相机图标应出现在播放器的右下角“设置”图标的左侧。单击它时,视频中的当前帧将以 JPEG 格式保存到您的计算机中。
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