在线转换视频文件 - 将视频文件从一种格式转换为另一种格式，比如AVI到MP4，WEBM到MP4，MOV到MP4，MP4到MKV，WMV到MP4，MP4到GIF等。

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2024年4月16日 · 这个ffmpeg命令用于将一张图片(cover.jpg)作为封面嵌入到一个MP4视频文件(input.mp4)中，并输出一个新的视频文件(output.mp4)。 命令中的各个选项和参数含义如下：

This MP4 converter lets you easily convert files to the MP4 format. Upload your video file or provide a link to a video file to convert your video online to MPEG4. This high quality MP4 conversion tool is optimized for high quality and is free to use.

Make an MP4 video by combining photos, videos, GIFs, and music together — it's free & online. Add text, stickers, and other elements, and do more.

Resize your MP4 videos easily and for free with this resizing tool. Our editor makes it quick and simple to create the perfect MP4 clip for your YouTube channel, TikTok, Instagram stories, Pinterest feed, and so much more.

2025年3月12日 · 分享一下使用ffmpeg把视频和图片压制到同一个mp4的代码。 应用场景是保存了好多Instagram快拍，有mp4也有jpg，分辨率和编码格式也有不同，需要压制成合集。

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