CAVS to ICO Converter

Convert CAVS to ICO: What This Tutorial Covers

A .cavs file is video — a raw Chinese AVS (AVS1) elementary stream. ICO is the Windows icon container, where each stored image tops out at 256 x 256 pixels because the directory entry records width and height in a single byte apiece. So this is not "turning a clip into an animated icon": the converter freezes one frame and writes that single picture as an icon. This tutorial covers picking the frame, picking the size, and the one aspect-ratio trap that catches people converting widescreen footage.

How to Convert CAVS to ICO

1. Upload Your CAVS File: Drag the .cavs file onto the page or click "+ Add Files" to browse. Several clips can be queued and each yields its own icon.
2. Choose the Frame: Under Frame Selection, "Specific Frame" is preselected and Time (seconds) starts at 0. Type the moment you want — the field takes decimals, so 2.1 is two and a tenth seconds in. "Multiple Screenshots" samples the whole clip instead.
3. Set the Icon Size: Image resolution has a single control on an ICO target — the "Preset Resolutions" list of icon sizes: 256, 192, 180, 128, 64, 48, 32, 24 and 16 pixels. The percentage, keep-original and Width x Height modes you see on other image targets are not offered here, because an icon has to land on one of these dimensions.
4. Convert and Download: Click "Convert" and take the .ico file. No sign-up, no watermark.

Walk-through: The Frame Decides Everything

Everything outside the single captured frame is discarded, so the timestamp matters more than any other setting. The default of 0 grabs the opening frame, which on a broadcast capture is usually a black lead-in, a fade or a channel ident — rarely what you want staring back at you from a taskbar.

• If you know the timestamp, type it straight in. Decimals count: 1.5 is one and a half seconds, 12.25 is twelve and a quarter.
• If you want a logo or title card, those normally sit a few seconds in — try values between 2 and 5 and adjust once you see the result.
• If you have no idea where the good frame is, switch Frame Selection to "Multiple Screenshots", pick a Capture Rate, and let the tool export a strip of stills across the clip. Choose the one that works, then come back and convert that exact timestamp.
• If the frame lands mid-motion, nudge it a few tenths of a second. Broadcast AVS is often interlaced, and a frame caught during movement can interleave two fields.

Also remember that a raw AVS stream carries no index, so the seek lands on the nearest decodable frame at or after the offset you asked for rather than on a guaranteed exact one.

Icon Sizes and Where Windows Uses Them

Microsoft's guidance is that an app should ship 16, 24, 32, 48 and 256 pixel icons as a bare minimum, because Windows looks for an exact size match first and only scales when it cannot find one.

What Each Control Actually Does

The consequence worth planning around: a widescreen frame does not become a square icon, because the aspect ratio is preserved rather than cropped away. If you need a true square, extract the frame with CAVS to PNG, square it up with Crop PNG, then run PNG to ICO.

When This Doesn't Work

If what you want is a viewable still rather than a tiny icon, convert to a normal image format instead — PNG for a lossless full-resolution frame, or CAVS to JPG for a small photographic one. If you want the clip to stay playable, an icon is the wrong target entirely and CAVS to MP4 is the right one. And if you are building a complete favicon package for a website rather than a one-off icon, our Favicon Generator produces a multi-size .ico plus the PNG and manifest files browsers and mobile launchers expect, which is more than a single-frame conversion can give you.

Frequently Asked Questions

Does the ICO keep the video's motion or sound?

No. ICO stores still images, so the output is one frozen frame with no animation. There is no sound either, and in this case there never was: a raw .cavs is a video-only elementary stream, because AVS broadcast workflows coded audio separately and muxed it in only when the transport container was built.

Which frame gets used if I do not change anything?

The frame at time 0, the first one in the clip. That is frequently a black lead-in on broadcast captures, so setting Time (seconds) to a later moment is usually the difference between a usable icon and a black square.

Why is 256 x 256 the maximum?

Because of how the ICO directory is defined: each entry records the image width and height as a single byte, with the value 0 meaning 256. That caps any single image in the file at 256 pixels per side, and the converter clamps your requested size to match rather than writing something Windows would reject.

My icon is not square — is that a bug?

No, it is the aspect ratio being respected. The size preset sets the icon's height and the width follows from the shape of the video frame, so a 16:9 capture produces a wide icon rather than a square one. Nothing is cropped or stretched to force a square. If you need a conventional 1:1 icon, crop the frame to square before the ICO step — extract a PNG, crop that, then convert the cropped square.

Does the file contain several sizes, like a proper app icon?

No — this conversion writes one image at the size you selected. A shipping Windows app icon usually bundles 16, 24, 32, 48 and 256 pixel versions in a single .ico, and a website favicon commonly bundles 16, 32 and 48. Use the Favicon Generator when you need that multi-size bundle.

Why does the icon look blurry or mushy?

Two things stack up. The source is a standard-definition broadcast frame that was already compressed before you received it, and it is then reduced to a 256-pixel height at most — often an eight-fold reduction. Pick a frame with a simple, high-contrast subject; fine detail and busy backgrounds simply do not survive at icon scale.

Can I use the result as a website favicon?

Yes. A 32 or 16 pixel .ico works as a classic favicon.ico, and browsers still request that path. For a modern site you generally also want PNG icons for high-DPI tabs, an Apple touch icon and a web manifest, which is what the Favicon Generator produces in one pass.

Can I extract several candidate frames before committing?

Yes, and it is the efficient way to work with a format you cannot preview. Switch Frame Selection to "Multiple Screenshots" and choose a Capture Rate — anywhere from one frame every 0.1 seconds to one every 10 seconds. Each captured frame is written as its own icon, so you can look through them and keep the best.

What happens to my uploaded file?

It is uploaded over an encrypted connection, decoded and converted on our servers, and deleted automatically a few hours later — no sign-up, no watermark, never shared or made public.