WMV to HEVC Converter

How to Convert WMV to HEVC Online

1. Upload Your WMV File: Drag and drop or click "Add Files" to select WMV recordings from Windows Movie Maker, OBS captures, Camtasia exports, lecture-capture systems, or archived screencasts. Batch is supported — drop in an entire folder and each file transcodes in parallel.
2. Pick Quality Preset or Bitrate Mode: Default is the "Very High (Recommended)" Quality Preset, which targets visually-lossless H.265 output. Switch to Specific file size to cap output at an exact MB target, Constant Bitrate for predictable streaming sizes, Variable Bitrate for the smallest file at the same quality, Constant Quality to dial in a CRF value (18 = visually lossless, 23-24 = balanced default for HEVC, 28 = small with mild artifacts), or Constraint Quality for capped VBR when there's a hard bandwidth ceiling.
3. Resize or Trim if Needed (Optional): Under Video resolution, keep original, pick a Preset Resolution (2160p / 1440p / 1080p / 720p / 480p / 360p / 240p), scale by Resolution Percentage, or enter custom Width × Height (aspect ratio is locked unless you choose Width × Height explicitly). Under Trim, pick Time Range and enter start time + duration in seconds or HH:MM:SS.sss format — useful for slicing a 2-hour lecture WMV into a 30-second clip before re-encoding.
4. Convert and Download: Click Convert. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours — no sign-up, no watermark, never shared. Output is an Annex B elementary stream (.hevc) carrying H.265 NAL units, ready to remux into MP4/MKV or feed directly into HEVC decoders.

Why Convert WMV to HEVC?

WMV (Windows Media Video) is Microsoft's legacy video codec family, introduced with WMV 7 in 1999 inside the ASF container. Active codec development effectively ended after WMV 9 was standardized as SMPTE VC-1 in 2006 — no new WMV versions have shipped, and the codec has been outclassed by every modern format on compression efficiency. HEVC (H.265, ITU-T Rec. H.265 / ISO/IEC 23008-2), approved by the ITU-T on April 13, 2013, delivers the same visual quality at roughly half the bitrate of H.264 and substantially less than WMV 9. A .hevc file is an Annex B elementary stream — each NAL unit prefixed with the 0x000001 start code, no container, no audio. That makes it the right intermediate for piping into ffmpeg, packagers, or hardware HEVC decoders. Common reasons to convert:

• Cross-platform playback — WMV/VC-1 is poorly supported outside Windows. macOS dropped native WMV in QuickTime X, iPhones and iPads cannot play WMV at all without a third-party app, and most smart TVs and streaming sticks reject the format. HEVC is decoded natively by iOS 11+ (Sept 2017), macOS High Sierra+, Android 5+, Windows 10 (with the HEVC Video Extensions add-on), and Safari 11+.
• Archive shrink — Old WMV libraries from screen-capture tools (Camtasia, Captivate), lecture recorders (Panopto, Echo360), and Windows Movie Maker exports often run 1-3 Mbps for SD content that HEVC reproduces at 400-800 kbps. Re-encoding a 100 GB WMV training archive typically lands around 35-50 GB at equal perceived quality.
• Pipe into a packaging or streaming workflow — Annex B .hevc is the format ffmpeg expects when remuxing into fragmented MP4 (fMP4) for HLS/DASH, packaging into MPEG-TS for live streaming, or feeding x265's reference decoder. Wrapping a WMV directly into MP4 fails because VC-1 in MP4 is allowed but rarely supported; HEVC in MP4 is universal.
• Modern editor compatibility — DaVinci Resolve, Premiere Pro, Final Cut Pro, and CapCut accept HEVC natively. WMV import requires a Windows-only codec component, and Resolve dropped WMV entirely on macOS and Linux. Transcoding to HEVC unlocks the same source in any editor.
• 4K and HDR workflows — WMV 9 caps out at 1080p in most encoders and has no HDR pipeline. HEVC Main 10 supports 10-bit color, HDR10, HDR10+, and up to 8K (level 6.2). Necessary if you're modernizing legacy footage for current displays.
• Lossless intermediate stage — When you need an elementary stream for a multi-step pipeline (extract → edit → remux), .hevc Annex B is the cleanest hand-off — no container overhead, no audio sync drift, just raw NAL units that any HEVC tool can read.

WMV vs HEVC at a Glance

Quality and Bitrate Mode Quick Guide

If you want a playable container instead of a raw elementary stream, follow up with HEVC to MP4 or HEVC to MKV. Already have HEVC and just want it smaller? Try Compress HEVC. Want to skip HEVC and go straight to MP4? See WMV to MP4.

Frequently Asked Questions

What's the difference between a .hevc file and an .mp4 file containing HEVC?

A .hevc file is a raw Annex B elementary stream — each H.265 NAL unit is prefixed with the start code 0x000001, and the file contains no container, no audio track, and no timing metadata. An .mp4 with HEVC inside (typically hvc1 or hev1 brand) wraps the same NAL units inside the ISO Base Media File Format with a separate hvcC decoder configuration record, audio tracks, chapters, and presentation timing. Use .hevc as an intermediate for tooling (ffmpeg, x265, packagers); use .mp4 for end playback. To go from .hevc to a playable file, remux with ffmpeg's -c copy — no quality loss.

Will my WMV audio be preserved?

A pure .hevc Annex B file is video-only — H.265 elementary streams have no audio channel by spec. If your source WMV has a soundtrack (WMA, MP3, or AAC audio in ASF) and you need it kept, convert to a containerized HEVC target instead: WMV to MP4 keeps both video and audio in a single playable file. The HEVC elementary stream output is the right pick when you specifically need a video-only bitstream for a downstream pipeline; audio gets handled separately.

How much smaller will my WMV become after HEVC encoding?

Real-world reductions depend heavily on the source bitrate, but typical results for screen-capture WMV at 1-3 Mbps land at 30-50% of the original size at "Very High" quality. Camera-source WMV (rare but it exists for older Windows Phone / Lumia footage) often shrinks 50-65% because HEVC handles smooth-gradient content much better than WMV 9. The exact ratio depends on content complexity — talking-head and slideshow footage shrinks more than fast-motion video.

Can my browser play the .hevc output directly?

No, and that's by design. .hevc is a raw bitstream, not a container — no browser or media player tries to play it directly. To preview, drag it into VLC (which decodes raw HEVC), or remux to MP4 with HEVC to MP4. If you want a file you can double-click and play, pick MP4 as your target instead of .hevc.

Will HEVC play in Windows Media Player or on Windows 10/11?

Windows 10 and 11 require the HEVC Video Extensions, available through the Microsoft Store. The official "HEVC Video Extensions" listing is $0.99; "HEVC Video Extensions from Device Manufacturer" ships free on devices that include hardware HEVC decoders (most Intel 7th-gen+ and AMD Ryzen builds). After install, Films & TV, Photos, and any DirectShow-based player decode HEVC natively. The classic Windows Media Player Legacy does not decode HEVC even with the extension installed — use Films & TV or VLC instead.

Do I need to keep my original WMV file after converting?

For most uses, no — HEVC at "Very High" or CRF 20-22 is visually lossless against WMV 9 source, and modern playback is universally HEVC-friendly. Keep the original WMV if you have a regulatory or archival reason for the source format (some legal-hold and government-records systems require unmodified originals), or if you're not yet confident the new file plays in every downstream system. For Windows-only legacy environments that must stay on WMV, see HEVC to WMV.

How does HEVC compare to H.264 — should I just convert WMV to H.264 instead?

H.264 is more universally playable (every browser, every device since 2010) but produces roughly 40-50% larger files than HEVC at equal quality. Pick HEVC if your audience is on iOS 11+, macOS 10.13+, modern Android, Windows 10/11 with the extension, or a 2018+ smart TV — and you want minimum file size. Pick H.264 (via WMV to MP4) if you need to send to unknown recipients, older Windows builds, or web embeds for general public audiences. HEVC also takes 2-5x longer to encode than H.264 on the same hardware.

What HEVC profile and bit depth does the output use?

The default output is HEVC Main profile, 8-bit 4:2:0 — broadly compatible with all HEVC hardware decoders since 2015, including iPhone 6s+ (A9 chip, 2015), Apple TV 4K, every HEVC-capable smart TV, and Intel 6th-gen+ / AMD Ryzen integrated graphics. Main 10 (10-bit) output is available when you specifically need HDR10 or banding-free dark scenes, but it requires a Main 10-capable decoder (most 2017+ hardware). Most WMV sources are 8-bit anyway, so Main is the right default.

Can I batch-convert a whole folder of old WMV recordings?

Yes. Upload as many WMV files as you want — there's no quantity limit. Apply the same Quality Preset and resolution settings to all of them, or set per-file options for a mixed batch. Each file transcodes in parallel on our servers and downloads individually or as a single ZIP. For large multi-GB libraries, this is the fastest way to migrate a Camtasia/Captivate/Movie Maker archive off the legacy format in one pass.