How to Convert MKV to MP4 Using Shutter Encoder?

When we speak of a free, open-source media processing tool, Shutter Encoder is worthy of recommendation. This multi-function utility offers many editing features, including video transcoding/rewrapping, file resizing/cropping, subtitle embedding, etc. It is favored by a large number of users for its easy-to-use interface and efficient processing performance.

In this guide, we will introduce how to use Shutter Encoder to convert videos from MKV to MP4 format. It is specifically divided into the following two cases:

• Rewrap directly into MP4 without re-encoding (with no quality loss).
• Re-encode and transcode into MP4 (with adjustable quality).

This is a simple and quick operation. Since the video will not be re-encoded, there will be no quality loss.

Download and install the latest version from the official website of Shutter Encoder.

Open Shutter Encoder, drag the MKV files that need to be converted into the software window or click the "Browse" button in the upper left corner to select the files manually.

From the "Choose function" drop-down menu on the left side, select "Rewrap", and then choose ".mp4" as the output format.

To easily locate your converted MP4 files, you'd better change the destination path.

When everything is ready, click the "Start function" button, and Shutter Encoder will quickly rewrap your MKV files into the MP4 format.

Since transcoding is not involved, the conversion speed is super-fast.

If the audio or video encoding format contained in your MKV file is not supported by MP4 (e.g., some old audio formats), or if you want to adjust parameters like the resolution and bitrate of the output file, transcoding is required.

The same as the steps in Case #1, drag the MKV files that need to be converted into Shutter Encoder.

From the "Choose function" drop-down menu on the left side, go to the "Output codec" section, select "H.264" or "H.265" as the encoder, and the output format will be set to MP4 by default.

Again, don't forget to choose a location for your converted MP4 files.

This is an optional step. Navigate to the right side of the software, here you can make some changes based on your needs:

• Scale: You can upscale/downscale the resolution or just keep it as "Source".
• Bitrates adjustment: Specify CBR (Constant Bit Rate) for video and audio or switch to VBR (Variable Bit Rate). You can even adjust the output file size.
• Audio settings: Select "AAC" or "AC3" if your converted MP4 file has no sound.
• Image cropping: Only enable the option if you want to remove some unwanted objects from the video image (e.g., the black bars around the video).
• Add subtitles: Enable this option if you need to add a new external subtitle file.
• Advanced features: If the original MKV file contains subtitles, check the "Preserve subtitles" option.

After confirming all the settings, click the "Start function" button to start transcoding. The transcoding time depends on the file size and encoding parameters.

If you think the settings of Shutter Encoder are too complicated, WonderFox HD Video Converter Factory Pro is a simpler and more intuitive alternative. It supports one-click operation and is suitable for beginners.

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• DownloadDownload and install the versatile video processor on your PC.
• Run the software and click on Converter to open the module.
• Drag and drop your MKV files into the window, it supports batch processing.
• Click on the Format image to expand the full list of output formats and presets.
• Go to the Video category, and select MP4 to rewrap your MKV files without re-encoding.
• To transcode MKV to MP4, click on the Parameter settings button to change the codec, resolution, bit rate, and more.
• Choose an output folder at the bottom, and finally, hit the "Run" button to start the conversion.

A: If your MP4 has no sound, this is because the audio encoding in the original MKV file is not supported by MP4. In this case, open the "Audio settings" panel of the Shutter Encoder. Select AAC or AC3 as the audio encoding format.

A: It can be divided into two cases:

• If the original MKV file has some built-in subtitle tracks, check the "Preserve subtitles" option in the "Advanced features" section.
• If you need to manually add subtitles like a .srt file, select "Add subtitles" and upload the subtitle file.

A: Here are some alternative tools:

• HandBrake: A free and powerful video transcoding tool, suitable for advanced users.
• VidCoder: A simplified version of HandBrake with a more intuitive operation.
• LosslessCut: Suitable for lossless trimming and simple packaging.
• XMedia Recode: Comprehensive in functions and supports batch conversion.