AVCHD to WMV Converter

AVCHD to WMV — Should You Re-encode Down to Windows Media Video?

Your camcorder's AVCHD clips already use H.264/AVC, a modern, efficient codec. Converting them to WMV moves the picture to Windows Media Video 8, an older and less efficient codec — you gain Windows-Media compatibility but lose coding efficiency, and a lossy-to-lossy re-encode never adds quality back. So convert to WMV only when something specifically demands it: a legacy Windows Media Player or Windows Movie Maker workflow, an old PowerPoint deck that embeds .wmv natively, or a Windows-only application that won't read anything else. If your real goal is durable, widely-playable footage, AVCHD to MP4 keeps the efficient H.264 stream and plays nearly everywhere — that is the better default.

Side-by-side Comparison

When to Pick WMV

• A legacy Windows Media Player or Windows Movie Maker project that only ingests .wmv.
• An older PowerPoint deck on Windows that embeds and plays Windows Media clips natively without an external codec.
• A Windows-only application or appliance that lists Windows Media Video as the only supported input.
• You need a single self-contained ASF file rather than the camcorder's BDMV/STREAM folder of .MTS segments.

When to Keep H.264 (Convert to MP4 Instead)

• You want footage that plays on phones, browsers, smart TVs, and social platforms — none of which natively want .wmv.
• File size matters: H.264 is more efficient than WMV 8, so an AVCHD to MP4 result is typically smaller at the same visual quality.
• You're editing in Premiere Pro, DaVinci Resolve, Final Cut, or iMovie — they all prefer H.264 MP4 and treat WMV as a second-class input.
• You're archiving for the long term; H.264 has far broader, more durable support than legacy Windows Media Video.

How to Convert AVCHD to WMV

1. Upload Your AVCHD File: Drag and drop the .MTS or .M2TS files from your camcorder's BDMV/STREAM folder, or click "Add Files" to browse. Batch upload is supported, so you can queue several clips from the same shoot and convert them with the same settings.
2. Pick Quality Preset or Bitrate Mode: The video defaults to Windows Media Video 8 (WMV2) and the audio to WMA v2 — the standard pairing inside a .wmv file. Leave Preset on "Very High (Recommended)", or under File Compression switch to Constant Bitrate, Variable Bitrate, Constant Quality, or a Specific file size to control the output.
3. Resolution and Trim (Optional): Under Video resolution choose Keep original, a Preset Resolution, a Resolution Percentage, or a custom Width × Height. Use Trim → Time Range to cut one segment out of a long take in the same pass.
4. Convert and Download: Click Convert and save your .wmv file. No sign-up, no watermark.

Frequently Asked Questions

Should I convert AVCHD to WMV at all, or to MP4 instead?

For almost every modern use, choose MP4. AVCHD already stores efficient H.264 video; WMV's default codec is Windows Media Video 8, an older generation that is less efficient and barely plays outside Windows. Re-encoding to WMV buys Windows-Media compatibility at the cost of coding efficiency, so the file often needs more bits to look the same. Convert to WMV only when a specific Windows-Media workflow demands it — legacy Windows Media Player or Movie Maker, an old PowerPoint that embeds .wmv, or a Windows-only tool. If you just want footage that plays everywhere and stays small, use AVCHD to MP4.

Will I lose quality going from AVCHD to WMV?

Some, yes — and it is unavoidable, not a tool flaw. AVCHD's H.264 video is already lossy, and re-encoding it to Windows Media Video 8 is a second lossy pass to an older, less efficient codec, so no detail is regained and the picture can only soften. The resolution stays HD if you keep it (a 1920×1080 source stays 1080), but WMV 8 generally needs more bits than H.264 to hold the same quality. Leave the resolution on Keep original and use a high preset so the re-encode adds as little loss as possible.

Which WMV codec and audio does the output use?

The video defaults to WMV2 — the FourCC for Windows Media Video 8 — and the audio to WMA v2, the standard pairing inside a .wmv file, which is itself an ASF (Advanced Systems Format) container. You can switch the video to WMV 1 (Windows Media Video 7) if an older target requires it. These are distinct from Windows Media Video 9, which Microsoft submitted to SMPTE and which was standardized in 2006 as SMPTE 421M, better known as VC-1.

What happens to my AVCHD's AC-3 or PCM audio in a WMV?

It is re-encoded. AVCHD camcorders record Dolby AC-3 (stereo or 5.1) or linear PCM, but a WMV file normally carries Windows Media Audio, so the track is converted to WMA v2 by default. That re-encode is lossy and a 5.1 mix is folded down toward stereo, so pick a generous preset to keep the result clean. If keeping multichannel or the original AC-3 matters, an MP4 via AVCHD to MP4 can retain AC-3 directly.

Why won't my phone or browser play the WMV I created?

That is expected. WMV is a Windows-Media format with poor native support outside Windows — phones, browsers, smart TVs, and social platforms generally won't play .wmv without extra software. On the desktop, VLC plays WMV everywhere without installing codecs. If you need playback beyond Windows, the AVCHD footage should go to MP4 instead, which every major browser and device supports natively.

My camcorder split one long take into several .MTS files — how do I handle that?

AVCHD camcorders write to FAT32 cards that cap a single file at 4 GB (2 GB on older cards), so a long take auto-splits into sequentially numbered .MTS files (00001.MTS, 00002.MTS…) in BDMV/STREAM. The split is at a fixed size boundary, not a scene cut, so audio and video continue across files without gaps. Upload all the segments together; the converter treats each as its own clip, and concatenating them in any editor produces a seamless timeline.

How are my files handled, and how long are they kept?

Your file is uploaded over an encrypted connection, processed on our servers, and deleted automatically a few hours after the conversion — no sign-up, no watermark, never shared or made public.