Convert M4V to MKV

M4V → MKV. Source file ≤ 2 GB · Output ≤ 1 GB.

MP4 is a video container, not a codec. Its actual video and audio codecs depend on the file. Matroska can hold several kinds of video and audio codecs.

M4V → MKV: Example settings

60 s • H.264 4,000 kbps + AAC 192 kbps ≈ 31.44 MB

MKV: Output

Sizes are examples, not guarantees. Container overhead is extra; variable bitrate and image content change the result. Keep the original and compare the output.

JavaScript is required for file selection and processing.