Can WMV be remuxed to MKV without re-encoding?

Yes — FFmpeg can copy the VC-1 or WMV video stream and the WMA audio stream directly into an MKV container with no quality loss. Use "-c copy" for the fastest conversion.

Will the audio be preserved during conversion?

Yes. WMA audio streams are supported inside MKV. You can copy them as-is or re-encode to AAC, FLAC, or MP3 using the audio option in the command builder.

Does converting WMV to MKV lose quality?

Not if you use the remux (copy codec) method. Quality loss only occurs when you choose to re-encode the video stream with a different codec such as H.264 or H.265.

How long does WMV to MKV conversion take?

A remux (stream copy) typically finishes faster than real-time — a 2-hour WMV file can remux in under 30 seconds. Re-encoding with H.265 can take 1–5x the video duration depending on your CPU or GPU speed.

Do I need to install FFmpeg?

Yes. FFmpeg is a free, open-source tool available for Windows, macOS, and Linux. Download it at ffmpeg.org, extract it, and add the bin folder to your system PATH.

What is the difference between WMV and MKV?

WMV is a proprietary Microsoft format tied to the Windows ecosystem with limited multi-track and subtitle support. MKV is an open standard supporting unlimited audio/subtitle tracks, chapters, all modern codecs, and HDR metadata.

WMV to MKV Converter

Name: WMV to MKV Converter
Availability: InStock
Author: Nham Vu

Generate FFmpeg commands to convert WMV video files to MKV format — with a format comparison table and interactive command builder.

FFmpeg Command Builder

Fill in the fields and get a ready-to-run FFmpeg command.

Input filename

Output filename

Conversion mode

Audio handling

Generated Command

ffmpeg -i video.wmv -c copy video.mkv

Remuxes the WMV container into MKV without re-encoding. All streams are copied as-is — lossless and very fast.

WMV vs MKV — Format Comparison

Feature	WMV	MKV
Developed by	Microsoft (proprietary)	Matroska (open source)
Released	2000	2002
Audio tracks	1 (WMA)	Unlimited
Subtitle tracks	Very limited	Unlimited
Chapter support	No	Yes
Codec support	VC-1, WMV1/2/3 only	All codecs (H.264, H.265, AV1...)
Cross-platform	Windows-first (patchy elsewhere)	All platforms
HDR / metadata	No	Yes

Quick FFmpeg Reference

Remux (lossless, fastest)

ffmpeg -i input.wmv -c copy output.mkv

Re-encode to H.264 + AAC

ffmpeg -i input.wmv -c:v libx264 -crf 23 -c:a aac output.mkv

Re-encode to H.265 + AAC

ffmpeg -i input.wmv -c:v libx265 -crf 28 -c:a aac output.mkv

Add external subtitle file

ffmpeg -i input.wmv -i subs.srt -c copy -c:s srt output.mkv

Batch convert (Linux/macOS)

for f in *.wmv; do ffmpeg -i "$f" -c copy "${f%.wmv}.mkv"; done

Copied!

Summary

Generate FFmpeg commands to convert WMV video files to MKV format — with a format comparison table and interactive command builder.

How it works

WMV files use Microsoft's proprietary VC-1 or WMV codec inside an ASF container, which limits playback on non-Windows devices.
MKV is a flexible open container that can hold the same VC-1 stream without decoding it — called a remux — preserving quality.
If you need broader hardware compatibility, FFmpeg can re-encode the video to H.264 or H.265 while remuxing into MKV.
Use the command builder below to generate an FFmpeg command for your specific conversion goal.
Run the generated command in your terminal; a remux completes in seconds regardless of file size.

Use cases

Convert WMV files to MKV so they play on Linux, macOS, Android, and smart TVs.
Remux WMV to MKV to add multiple audio tracks or subtitle streams not supported in WMV.
Re-encode WMV content to H.264 or H.265 inside MKV for hardware-accelerated playback.
Archive old WMV video libraries in the open MKV format for long-term compatibility.
Reduce file size by re-encoding WMV with H.265/HEVC into a smaller MKV file.
Add chapter markers or rich metadata to videos migrated from the WMV format.
Enable subtitle and multi-language audio support that the WMV container cannot provide.
Batch-convert an entire WMV collection to MKV using a single FFmpeg loop command.

Frequently Asked Questions

Last updated: 2026-06-11 · Reviewed by Nham Vu