How to convert mkv to mp4 without losing quality in windows 11?

FF-mpeg’s video conversion feature is a powerhouse of flexibility and performance, giving you complete control over how your videos are transcoded, remuxed, or re-scaled. At its core, FF-mpeg can read nearly any input format—MKV, MOV, AVI, WebM, and more—and can output to all the major containers and codecs you need, such as MP4 with H.264/H.265 video and AAC audio. Whether you’re simply repackaging streams without re-encoding for lightning-fast “remux” conversions, or fully re-encoding to change resolution, bitrate, or codec, FF-mpeg’s command-line interface lets you script and automate batch mkv to mp4 conversion jobs with precision.

Beyond basic conversion, this free mkv to mp4 converter offers advanced filters for cropping, padding, deinterlacing, frame rate conversion, subtitle embedding, and even complex filter graphs that chain multiple effects in a single command. Its performance is highly tunable via presets (e.g., ultrafast, medium, slow) and quality settings (CRF, bitrate targets), allowing you to balance speed, file size, and visual fidelity. With FF-mpeg installed on Windows (just add its bin folder to your PATH), a single command can transform your video library to virtually any format, making it an indispensable tool for both quick one-offs and large-scale media workflows.