4个最佳免费MP4到MKV转换器，可在单击内将MP4文件转换为MKV

如果要在MP4视频中添加字幕，最好将MP4转换为MKV。 MKV是Matroska视频文件，支持无限数量的音频，图片和字幕轨道。将MP4转换为MKV文件并不难。您可以从本文中了解有关4种最佳方法的更多详细信息。此外，这是添加字幕和轻松编辑视频的终极方法。

第1部分：将MP4转换为MKV的3种最佳方法

页首1：如何免费在线将MP4转换为MKV

When you want to convert MP4 files to MKV online, FVC Free Online Video Converter is a versatile video converter to convert most of the video formats, such as MP4, MKV and more for free. It also enables you to tweak the video and audio settings for the output. Moreover, it supports batch conversion that you can convert a bunch of videos or audio with ease.

1. 1.将MP4转换为MKV，AVI，FLV和其他更多媒体格式/预设。
2. 2.调整视频编解码器，帧速率，视频格式以及视频格式。
3. 3.转换很简单，没有水印或其他限制。
4. 4.提供一个简单的界面，可在3个步骤中将MP4转换为MKV文件。

Step 1. Go to FVC Free Online Video Converter, you can click the Add Files to Convert button to add the MP4 file into the program. If it is the first time you use the online MP4 to MKV converter, you should download the installer beforehand.

Step 2. Once you have imported the MP4 videos, you can choose the MKV option as the output format. You can click the Gear icon to tweak the video and audio settings, such as the video encoder, frame rate, resolution, and more other settings.

Step 3. After that, you can click the Convert button to convert MP4 to MKV with the desired quality. It takes a few seconds to get the desired MKV on your computer. You can preview the output video before saving it to your computer accordingly.

顶部2：如何使用VLC Media Player将MP4转换为MKV

VLC Media Player is more than a media player for MKV files, it also has its own set of codecs for most of the video and audio formats. If you do not have an MKV as output, you can also search for some plugins to convert MP4 to MKV files with VLC as below.

Step 1. Launch the VLC Media Player and launch the program on your computer. Click the Media menu and choose the Convert/Save... option to import the MP4 file you need to convert.

Step 2. In the Open Media window, click the File option followed by the Add icon. Select the MP4 file in your folder. After that, choose the Convert button from the Convert/Save dropdown menu.

Step 3. After that, you can choose the MKV as the output format. Click the Browse option to set a destination for the converted file. Then choose the Start option to convert MP4 to MKV.

页首3：如何从URL将MP4转换为MKV

是否可以将在线MP4直接转换为MKV？ AConvert有一系列视频到MKV的在线转换器，您可以输入视频的URL以转换为所需的格式。当然，它也使您能够调整视频设置。

Step 1. Go to aconvert.com on any of your browser, you can choose the Convert menu from the upper left corner. Click the arrow to select the Online File option from the drop down list.

Step 2. Click the Target format as MKV format. Then click the Options to adjust the video size, video bitrate, frame rate, video aspect and more other settings for converting MP4 to MKV.

Step 3. After that, click the Convert Now! button to start batch conversion. The output files will be listed in the Conversion Results section that you can download it to your computer.

第2部分：将MP4转换为MKV的终极方法

有没有一种方法可以直接将带字幕的MP4转换为MKV？ FVC Video Converter Ultimate是一款终极MP4到MKV转换器，使您可以轻松调整视频/音频设置，编辑视频文件，添加字幕/音轨，甚至从DVD翻录文件。

1. 1.以原始质量通过批处理将MP4转换为MKV。
2. 2.调整帧速率，视频质量，视频代码等。
3. 3.使用剪辑，旋转，修剪，剪切，压缩，视频滤镜等编辑视频。
4. 4.内置媒体播放器，可播放任何4K / 1080p HD视频格式和DVD文件。

Step 1. Download and install the program on your computer, you can click the Add File and select the Add File or Add Folders or directly drag multiple video and audio files to this program.

Step 2. After that, you can select the MKV file as the output and adjust the profile settings according to your need, such as the resolution, frame rate, audio codec and more other settings.

Step 3. When you need to add the subtitles or audio tracks, you can click the audio channel or the subtitle to choose the desired one before clicking the Convert All button to convert MP4 to MKV.

第3部分：有关如何将MP4转换为MKV的常见问题解答

结论

当您要本地化在线流视频时，可以了解有关轻松将MP4转换为MKV的最佳方法的更多详细信息。只需检查3种最常用的在线方法以及本文的最终解决方案即可。如果您对在Windows和Mac上将MP4文件转换为MKV有任何疑问，可以随时在本文中发表评论。