Step 1: Supply your WMV files using the button above or by haul and lay.
Step 2: Click the 'Convert' button to start the conversion.
Step 3: Get your converted M4V files.
WMV to M4V Conversion FAQ
What does the WMV to M4V converter do?
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WMV is a legacy container, often poorly supported on modern devices. Converting to M4V rewraps the video with a current codec (H.264 / H.265 / VP9) for broad browser, phone, and TV compatibility.
Will resolution and frame rate be preserved in the M4V?
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Yes. WMV → M4V keeps resolution, frame rate, and aspect ratio unchanged by default. To change them, use the Resize or Speed tool on the result.
Will the WMV play smoothly on modern devices after converting to M4V?
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Yes. Legacy WMV files often fail to play in modern browsers and on iOS / Android. M4V uses widely supported codecs that play natively on phones, tablets, smart TVs, and every modern browser.
Will the converted M4V be a different size than the WMV?
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Modern codecs compress better, so M4V from a legacy WMV is typically 30-60% smaller at equivalent quality. Conversions in the opposite direction can grow the file.
My WMV footage shows comb lines on movement — will that carry into the M4V?
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It will unless you deinterlace, and WMV content very often is interlaced because the format comes from the broadcast and DVD era. Interlaced frames store two half-height fields captured a fiftieth of a second apart; on a progressive-scan phone or monitor that reads as horizontal combing on anything that moves. Turn on the deinterlace option and the encoder weaves the fields into whole progressive frames before writing the M4V. WMV is Windows Media Video, Microsoft’s ASF-based format from the Windows XP era.
Can I add selectable subtitles once the file is M4V?
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Yes. WMV has no usable soft-subtitle track, so subtitles for WMV content had to be burned into the picture or shipped as a separate sidecar file. M4V carries subtitles as their own selectable stream, so after conversion you can attach an SRT track the viewer can switch on, switch off or restyle. Structurally an M4V is an MP4 — H.264 or HEVC with AAC — with optional Apple FairPlay DRM and iTunes chapter metadata.
Will the M4V I get back be locked to a store or an account?
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No, and the extension is what causes the confusion. M4V names a video file with the same internal structure as an ordinary MP4; the ones sold through a store are additionally wrapped in the seller's protection, and that wrapping is a property of the purchase rather than of the format. A file converted here has none of it — a plain, unprotected video that happens to carry that extension, playable wherever the extension is recognised and convertible onward as many times as you like. M4V is Apple’s variant of MP4, used by iTunes and the Apple TV app for films and TV episodes.
Can the M4V hold more than one audio track?
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Yes, and it is a real upgrade over WMV. M4V treats every audio stream as a first-class track, so an original-language mix, a dub and a director commentary can live in one file with the player switching between them on demand. M4V keeps chapter markers, artwork and subtitle tracks in the shape the Apple TV app expects, which plain MP4 often loses.
Will the text in my WMV screen recording still be readable as M4V?
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It will if you keep the resolution and raise the quality. Screen content is the hardest thing to compress well — large flat areas with hairline-thin text over them — and the default settings on any encoder are tuned for camera footage, where a little smearing is invisible. Scaling a recording down is what actually destroys the text, far more than the codec does, so encode at the captured resolution and let the file be larger than you expected.
Does M4V support chapter markers that WMV did not?
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It does. M4V stores chapters as container metadata, so a long recording can be navigated by section instead of by scrubbing a progress bar. WMV has nowhere to put that information, so if the source shipped with a chapter list it was in a sidecar file — hand that to the converter and it gets written into the M4V.
Is there a file-size limit when converting WMV to M4V?
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Anonymous uploads are capped at a generous default; signed-in free accounts get a higher cap, and Pro accounts have no per-file limit. Browser memory is usually the practical constraint long before our server-side limits kick in.
Can I batch-convert several WMV files to M4V at once?
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Yes. Drop or pick multiple WMV files in one upload — the converter processes them in parallel and returns a ZIP of the M4V results. There is no need to repeat the upload step per file.
