WTV to M4V Converter

How to Convert WTV to M4V Online

1. Upload Your WTV File: Drag and drop or click "+ Add Files" to add .wtv recordings exported from Windows Media Center. Batch conversion is supported — queue several recordings and apply the same settings to all of them.
2. Pick Quality Preset and Resolution: Default is Quality Preset = Very High (Recommended) with the original resolution and codec retained. For smaller files, switch File Compression to Specific file size or Constant Bitrate, choose a Preset Resolution (4K, 1440p, 1080p, 720p, 480p, 360p, 240p, 144p), or set a custom Width x Height. Use Constant Quality or Constraint Quality if you want CRF-style control.
3. Trim or Resize (Optional): Expand Trim and switch from Unchanged to Time Range to clip out ads, channel-bumpers, or the trailing minute of overrun common in TV recordings. Use Resolution Percentage to scale uniformly (e.g. 50%) without typing dimensions.
4. Convert and Download: Click "Convert". The file is processed on our servers — no sign-up, no watermark, no upload to a third-party account. Download the .m4v and drop it into the Apple TV app, iTunes for Windows, or sync to an iPhone / iPad.

Why Convert WTV to M4V?

WTV is the container Windows Media Center wrote to disk for recorded broadcasts, replacing the older .dvr-ms format starting with the TV Pack 2008 update. Apple's M4V container is structurally an MP4 with a different extension — it signals to macOS, iOS, tvOS, and iTunes that the file is a movie or TV episode rather than a generic clip, and it can carry FairPlay DRM (xconvert produces DRM-free M4V; we do not encrypt the output). Converting from WTV to M4V removes you from the Media Center silo and lands the recording in Apple's ecosystem with the correct metadata extension and a widely supported H.264 + AAC payload.

• Watch old DVR recordings on Apple TV — Apple TV HD and Apple TV 4K natively play M4V files containing H.264 or HEVC video with AAC, MP3, or AC-3 audio. WTV is not on that supported-format list, so direct AirPlay or Home Sharing of a .wtv will fail.
• Move recordings out of Windows Media Center before retiring the PC — Microsoft removed Windows Media Center in Windows 10 (released July 2015) and offered no replacement. Any .wtv left behind will only play on an aging Windows 7 / 8 install or via third-party tools like VLC.
• Sync TV episodes to iPhone or iPad — the iOS Files app and TV app recognize .m4v as video and route playback through the system H.264/HEVC decoder; .wtv opens as an unknown binary unless a third-party player is installed.
• Drop into iTunes / Apple Music for Windows — both treat .m4v as a first-class video import. WTV is rejected outright.
• Archive broadcasts with smaller files — WTV recordings of 30-minute SD broadcasts often run 1.5-3 GB because Media Center stores the original MPEG-2 transport stream verbatim. Re-encoding to H.264 inside M4V typically cuts size 60-80% at visually identical quality.
• Edit in Final Cut Pro or iMovie — both Apple editors import M4V/MP4 directly; neither has native WTV support.

WTV vs M4V — Format Comparison

Quality Preset Quick Guide

Frequently Asked Questions

Why won't my Apple TV play the WTV file directly?

Apple TV (HD and 4K) plays MOV, MP4, and M4V containers with H.264, HEVC, or MPEG-4 video, plus AAC / AC-3 / Dolby Atmos audio. WTV is a Microsoft container that's not on that list, and even VLC for tvOS only supports it through extra demuxing. Converting to M4V wraps the same picture in a container the Apple TV decoder recognizes natively, so you can stream it via Home Sharing, AirPlay, or the Computers app.

My WTV is copy-protected — will the conversion work?

If the recording came from a CableCARD tuner (Ceton InfiniTV, SiliconDust HDHomeRun Prime) and the broadcaster flagged it "copy once" or "copy never," the file is wrapped in PlayReady DRM and bound to the Windows Media Center machine that recorded it. xconvert cannot remove that protection — and neither can any legitimate converter. Recordings of over-the-air ATSC broadcasts from a USB tuner are unencrypted and convert cleanly. The easiest way to tell: try to play the file on a second Windows PC. If WMC says "Protected content," that's PlayReady.

How much smaller will the M4V be than the original WTV?

WTV stores the original MPEG-2 transport stream from the broadcast, which runs around 12-19 Mbps for 1080i ATSC. Re-encoding to H.264 at the Very High preset typically lands at 3-6 Mbps for visually equivalent quality, so expect roughly 60-75% smaller files. A 4 GB one-hour HD recording usually comes out around 1.2-1.6 GB.

Will the recording's program guide info (channel, episode name, air date) survive?

Mostly no. WTV embeds Microsoft's WMC-specific EPG metadata; M4V uses Apple's iTunes-style "Movie" / "TV Show" tags. The video and audio transcode losslessly enough, but the channel name and original air date are dropped because there's no compatible field. After conversion, use the Apple TV app's Info pane (or a tool like Subler / iTunes File Info) to re-tag the episode if you care about metadata.

Should I pick H.264 or HEVC for M4V?

xconvert outputs H.264 by default and that's almost always the right call for M4V. H.264 plays on every Apple device made since the iPhone 3GS and every Mac since 2009. HEVC delivers ~30-50% smaller files at the same quality but requires an Apple TV 4K, an iPhone 7 or newer, or a 6th-generation Mac with QuickSync — the original Apple TV HD, older iPads, and older Macs will fall back to software decode or refuse to play. For a recorded TV archive that needs to "just work" across the household, stick with H.264.

Can I trim the commercials before converting?

Yes — expand Trim in Advanced Options, switch from Unchanged to Time Range, and set the start and end timestamps. This is faster and lossier-free than trimming after conversion because the encoder simply skips frames outside the range. If you have multiple ad breaks scattered through the recording, do the conversion first and use a multi-cut tool like LosslessCut or our MP4 cutter on the output.

What's the difference between M4V and MP4 — should I just convert to MP4 instead?

The two containers are structurally the same (both are MPEG-4 Part 14). The .m4v extension is a hint to Apple's software that the file is a movie/TV episode and should be treated accordingly in the TV app, while .mp4 is treated as generic video. If your end destination is the Apple ecosystem (iTunes, Apple TV, iPhone), .m4v is the more idiomatic choice. If you're sharing with mixed-platform users, convert to MP4 instead — most non-Apple players don't auto-recognize .m4v until the extension is renamed.

Is there a file size limit on the upload?

xconvert handles WTV files up to several gigabytes in a single browser session. Because processing happens on our servers (not on a shared server queue like Convertio's 1 GB free cap), there's no fixed per-file upload limit — practical ceiling is your machine's RAM and how long you're willing to wait. For 5+ GB hour-long HD recordings, expect a few minutes of encode time on a modern laptop.

Can I convert M4V back to WTV or a different format later?

Going back to WTV is rarely useful — almost nothing reads it. If you need a different output, M4V converts cleanly to MP4, or you can compress the M4V further for storage. For the original recordings, WTV → MKV preserves multiple audio tracks and captions better than M4V if you're building an archive for Plex or Jellyfin.