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Supports: 3GP, 3G2
A .3g2 file is a 3GPP2 video container — the format CDMA-network phones from Verizon, Sprint, and U.S. Cellular recorded to — and .ico is Microsoft's Windows icon format. There is no such thing as an animated ICO, so this conversion is a frame grab: the decoder pulls one frame out of the clip and writes it as a square icon at a size Windows understands. The two format profiles below explain what you are moving between, and the how-to shows which two settings actually decide whether the icon looks good.
| Property | Value |
|---|---|
| Owner | 3GPP2, for CDMA2000 multimedia services |
| Specification | 3GPP2 C.S0050 (latest revision C.S0050-B v1.0, 2007) |
| Released | January 2004 |
| Structure | ISO base media file format (ISO/IEC 14496-12) — the MP4 family |
| Extensions | .3g2, .3gp2, .3gpp2 |
| MIME type | video/3gpp2 (registered in RFC 4393) |
| Video codecs | H.263, MPEG-4 Part 2, H.264/AVC |
| Audio codecs | EVRC, EVRC-B, EVRC-WB, QCELP (13K), SMV, VMR-WB, AMR, AAC-LC |
| Typical capture size | 176×144 (QCIF) or 320×240 (QVGA) |
| Not supported | HE-AAC v2 and AMR-WB+ audio (unlike 3GP) |
| Property | Value |
|---|---|
| Owner | Microsoft |
| Purpose | Icons for Windows executables, shortcuts, folders, and website favicons |
| Structure | A directory (ICONDIR) of one or more images, each stored as a DIB bitmap or, since Windows Vista, a complete PNG |
| Size range | 1×1 up to 256×256 pixels; 256×256 is the practical maximum Microsoft documents |
| Transparency | 1-bit mask historically; Windows XP added a full 8-bit alpha channel |
| Multi-size | Yes — one .ico can hold 16, 32, 48, and 256 px versions of the same artwork |
| Extensions | .ico (the near-identical .cur holds cursors) |
| MIME type | image/x-icon, also registered as image/vnd.microsoft.icon |
| Animation | None — ICO is a still-image container |
.3gp is accepted by the same pipeline, and you can queue several clips to convert with one set of settings.0, so an untouched job grabs the opening frame. Type a timestamp — decimals work, 2.100 means 2 seconds and 100 milliseconds — to land on a cleaner moment..ico. Files upload over an encrypted connection, are processed on our servers, and are deleted automatically a few hours later. No sign-up, no watermark.| Size | Where Windows uses it | Notes for a 3G2 source |
|---|---|---|
| 16×16 (16P) | Taskbar, title bars, list and detail views | Only a bold, high-contrast subject survives at this size |
| 32×32 (32P) | Desktop shortcuts, the classic default icon | The safest single-size pick if you are unsure |
| 48×48 (48P) | Large-icon view in File Explorer | Introduced alongside 8-bit colour in Windows NT 4.0 |
| 128×128 / 180×180 / 192×192 | Extra-large views and app tiles | Usually larger than a QVGA frame's short side |
| 256×256 (256P) | High-DPI displays; the format's documented maximum | Microsoft recommends storing this size PNG-compressed inside the ICO |
Because an icon slot is square and a 3G2 frame is not, expect a rectangular icon: the preset sets the height and the width follows the frame's shape — nothing is cropped or padded. And remember the source ceiling: a 320×240 recording holds fewer pixels than a 256×256 icon needs on its long edge, so "bigger" presets mostly stretch what is already there. Choosing a well-lit, simple frame matters more than choosing a large size. If you have a proper photo or logo rather than video, JPG to ICO and PNG to ICO start from a much better source.
No. ICO is a still-image container with no animation support in the specification — Windows animates cursors with the separate ANI format, not icons. The converter therefore samples a single frame and writes that. If what you want is the moving clip in an image format, 3G2 to GIF produces a looping animation instead, and 3G2 to MP4 keeps it as playable video.
The very first one. Frame Selection starts on Specific Frame with Time (seconds) set to 0, so a default job captures the frame at the start of the clip. That frame is often the worst one — cameras take a moment to expose, and the opening frame of a lossy recording can look dark or soft — so entering a time a second or two in is usually the single biggest improvement you can make to the result.
.ico from this tool hold several sizes at once?No — each conversion writes one image at the size you select. The format itself absolutely supports multi-size icons (that is the point of the ICONDIR directory at the head of the file, and Windows picks the closest match for each view), so if you need a 16/32/48/256 bundle, export each size here and combine them in a dedicated icon editor. For most uses — a desktop shortcut, a script, a small utility — a single 32×32 or 256×256 file is enough.
There is no transparency to keep. Video frames are fully opaque rectangles: H.263, MPEG-4 Part 2, and H.264 as used in 3G2 carry no alpha channel, so every pixel in the extracted frame is solid. ICO has supported an 8-bit alpha channel since Windows XP, so the container could store transparency — you would just have to mask the image yourself in an editor afterwards, then convert with PNG to ICO to preserve the alpha.
Two effects stack. The source frame is already low-resolution and lossy — CDMA-era phones typically recorded 176×144 or 320×240 with H.263 or MPEG-4 Part 2 at a low bitrate — and then downscaling to a 16- or 32-pixel square throws away almost everything that survived. Icons are read at a glance, so pick a frame with one large, high-contrast subject rather than a wide shot, or step up to 48P or 256P where more detail can land.
Yes. .ico is still the most widely supported favicon format, understood by every desktop browser including old versions that ignore PNG or SVG favicons. A 32×32 export is the pragmatic choice for favicon.ico; browsers scale it as needed. Bear in mind that a frame from a legacy phone video rarely reads well at favicon size — a simple graphic converted from PNG to ICO will look far sharper in a browser tab.
Usually the audio track. 3G2 can carry CDMA vocoders — EVRC, EVRC-B, EVRC-WB, QCELP (13K), SMV, VMR-WB — that many desktop players never shipped, so the file errors out or plays silently. Frame extraction only needs the video stream, which is ordinary H.263, MPEG-4 Part 2, or H.264, so the icon conversion succeeds even when playback does not. VLC is the most reliable local player if you want to preview the clip before choosing a timestamp.
.3g2 the same as .3gp?They are siblings. Both are built on the ISO base media file format (ISO/IEC 14496-12), but 3GP came from 3GPP for GSM/UMTS handsets and 3G2 came from 3GPP2 for CDMA2000 handsets. 3G2 adds the CDMA vocoders listed above and, unlike 3GP, does not store HE-AAC v2 or AMR-WB+ audio. For icon extraction the distinction is irrelevant: this page accepts both extensions and only reads video frames.
.3g2 is corrupt or won't convert?Files recovered from a dead handset or a failing memory card are often truncated mid-recording, which can leave the container's index incomplete and make frames unreachable. Try converting the whole clip with 3G2 to MP4 first — if that succeeds, the video stream is readable and you can grab the frame from the MP4; if it fails too, the file needs a repair tool rather than a converter.
It is uploaded over an encrypted connection, processed on our servers, and deleted automatically a few hours after the job finishes. Files are never shared or made public, there is no sign-up, and the .ico you download carries no watermark.