FFmpeg

If there's one tool that badly needs a GUI it's FFMPEG.

如果说有一种工具非常需要GUI，那就是FFMPEG。

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Use the existing preset command line to learn the basics of FFmpeg for a particular A/ V file and build upon them to improve the quality of the file.

使用现有的预设置命令行来了解特定的A/V文件的FFmpeg的基本要素并在此基础上改进文件的质量。

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We're going to build our own FFMPEG GUI, but the reason for this tutorial isn't so much helping people access the wonders of FFMPEG.

我们将会构建我们自己的FFMPEG GUI，但本指南的意义并不在于帮助人们了解FFMPEG的非凡之处。

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WinFF is a GUI front end for the command-line video converter FFmpeg.

WinFF是命令行视频转换器FFmpeg的一个GUI前端。

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FFMPEG is an incredible command-line application that can convert video and movie files from one format to another.

FFMPEG是一个十分优秀的命令行应用程序，它可以将视频和电影文件从一种格式转换为另一种格式。

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Now we come to the most interesting part& the Preset Command Line, which shows FFmpeg parameters for the preset.

现在，我们来到了最有趣的部分&预设置命令行，它显示了预设置的FFmpeg参数。

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WinFF helps generate the correct FFmpeg command line, which can be complex with all of the various options.

WinFF还可以帮助生成正确的FFmpeg命令行，但繁多的选项可以使之变得非常复杂。

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But the main section of the user-interface is going to be taken up by the FFMPEG options we'll choose to make user editable.

但是用户界面的主要部分将会被我们选出让用户编辑的FFMPEG选项所占据。

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After you read an online FFmpeg documentation ( see Resources), you may want to change the values and syntax of the parameters in the command line.

在阅读了一个在线FFmpeg文档（参见参考资料）后，您可能会想要在命令行内更改这些参数的值和语法。

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We'll need some way of selecting between the end formats of the conversion process, and we'll also need some way of showing the results of the FFMPEG command.

我们需要一些途径来选择转换过程的最终格式，并显示FFMPEG命令的结果。

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However, you may want to capture the full FFmpeg syntax for use in scripts or other batch functions.

不过，还是建议捕获完整的FFmpeg语法以便用在脚本或其他的批处理函数内。

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But for our FFMPEG example, we're going to try and keep things as open and modifiable as possible.

但对于我们的FFMPEG例子，我们要尽可能尝试保持内容的开放性和可修改性。

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Convert runs FFmpeg on the files in a shell/ command window.

Convert会在一个shell/command窗口中对这些文件运行FFmpeg。

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FFmpeg shows how many seconds have passed before it completes its run on the current file.

FFmpeg显示了它在当前文件上完成运行要花费的时间（秒）。

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You can build applications that interface with FFmpeg.

您也可以构建与FFmpeg接口的其他应用程序。

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We're going to use one tab to hold the main parameters we want to expose, and the other to hold the raw command output from FFMPEG.

我们将使用一个选项卡来保存要公开的主要参数，而另一个选项卡可用于保存来自FFMPEG的原始命令输出。

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This should mean that the user doesn't have to see the mess of FFMPEG output unless they switch tabs.

这应该意味着，除非用户切换选项卡，否则不会看到乱七八糟的FFMPEG输出。

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The FFmpeg command line depends on two libraries libavformat and libavcodec to provide support for many codecs and file formats.

FFmpeg命令行依赖于两个库libavformat和libavcodec来提供对很多编码解码器和文件格式的支持。

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There's no way we want to expose the average user to the hundreds of options that make up FFMPEG, so these will reflect the most common, simple options for each use.

我们没有理由向普通用户公开FFMPEG中数以百计的选项，因此这里只会出现最常用和最简单的使用选项。

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FFmpeg forces the FLV extension as the file format, sets the frame rate of29.97 frames per second ( fps), overriding the default of25, and sets a frame size of320x240 for a VGA screen.

FFmpeg要求以FLV作为文件的格式，设置帧速为每秒29.97帧，覆盖了默认值25，并设置VGA屏幕的帧的大小为320x240。

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Each radio button also needs to have its label changed to reflect the device that the FFMPEG output would be appropriate for.

对于每个单选按钮，还需要将其标签的文本修改为能够反映适合FFMPEG输出的设备。

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We're going to use this to display the output of the FFMPEG command.

我们将使用这个小部件来显示FFMPEG命令的输出。

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