为视频添加旁白¶

创建一个带有旁白的完整视频比创建纯视觉的Manim场景要复杂一些。人们必须在视频渲染后使用视频编辑程序来添加旁白。这个过程可能既困难又耗时，因为它需要大量的规划和准备。

为了简化向视频添加旁白的过程，我们创建了 Manim Voiceover，一个插件它允许你直接在Python中向场景添加旁白。要安装它，请运行

pip install "manim-voiceover[azure,gtts]"

访问安装页面了解更多关于如何安装Manim Voiceover的详细信息。

基本用法¶

Manim Voiceover 让你 …

直接在Python中为Manim视频添加旁白，无需使用视频编辑器。
在渲染过程中通过简单的命令行界面使用麦克风录制旁白。
使用各种免费和专有服务自动生成的AI语音开发动画。

它提供了一个非常简单的API，允许您指定您的配音脚本，然后在渲染过程中录制它：

from manim import *
from manim_voiceover import VoiceoverScene
from manim_voiceover.services.recorder import RecorderService


# Simply inherit from VoiceoverScene instead of Scene to get all the
# voiceover functionality.
class RecorderExample(VoiceoverScene):
    def construct(self):
        # You can choose from a multitude of TTS services,
        # or in this example, record your own voice:
        self.set_speech_service(RecorderService())

        circle = Circle()

        # Surround animation sections with with-statements:
        with self.voiceover(text="This circle is drawn as I speak.") as tracker:
            self.play(Create(circle), run_time=tracker.duration)
            # The duration of the animation is received from the audio file
            # and passed to the tracker automatically.

        # This part will not start playing until the previous voiceover is finished.
        with self.voiceover(text="Let's shift it to the left 2 units.") as tracker:
            self.play(circle.animate.shift(2 * LEFT), run_time=tracker.duration)

要开始使用Manim Voiceover，请访问快速入门指南。

访问示例库以查看一些Manim Voiceover的实际示例。