FFmpeg

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。

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。

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。