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Supports: ICO
ICO is the Windows icon container — a single file that packs several small bitmaps (Microsoft's Windows Vista icon guidance caps them at 256x256 pixels) so the shell can pick the right size for each context. AVCHD is the opposite kind of format: a high-definition camcorder recording standard that Sony and Panasonic introduced in 2006, carrying H.264 video inside an MPEG transport stream. Converting one to the other is a legitimate but narrow job — you get a short, silent, motionless clip — and this tutorial covers the settings that matter, what the file actually contains, and the two places people usually go wrong.
.ico onto the page or click "+ Add Files" to pick it from your computer. Several icons can be queued at once and share the same settings.| Property | Value for ICO to AVCHD |
|---|---|
| File written | A literal .avchd file containing MPEG transport stream bytes |
| Video codec | H.264 — the only codec offered on this page, matching the AVCHD standard |
| Audio | None. A still image has no sound, so no audio track is written and the Audio Codec control does not appear |
| Frame rate | 1 fps, with B-frames disabled (identical frames gain nothing from them) |
| Clip length | Whatever "Image Duration" is set to; 5 seconds by default |
| Frame size | The icon's own dimensions unless you pick a resolution preset |
| Transparency | Flattened onto the Background Color before encoding — video streams cannot store an alpha channel |
| Compression | Quality Preset ("Very High (Recommended)" by default), Constant Quality, or Constraint Quality |
Most video controls are irrelevant when the source is one motionless icon. Three are not:
.ico entry carries an 8-bit alpha channel, and video cannot. Everything transparent becomes the colour you pick, and the same colour fills the bars when the square icon sits inside a non-square frame. White is the default; Black usually looks better if the clip will be cut into dark footage.| AVCHD (this page) | MP4 | PNG | |
|---|---|---|---|
| What it is | H.264 in an MPEG transport stream | H.264 in an ISO base media container | Still raster image |
| Plays in browsers | No | Yes | Yes (as an image) |
| Keeps transparency | No | No | Yes |
| Typical use | Camcorder footage, Blu-ray-style playback chains | Anything: web, phones, editors, social | Icons, logos, UI artwork |
| Size for one held frame | Largest of the three — transport streams pad everything into fixed 188-byte packets | Smaller than the transport stream for the same frames | Tiny |
| Better choice for an icon? | Only when a device insists on it | If you need a video | Almost always |
.avchd extension, which almost no player recognises by name. The bytes are a standard MPEG transport stream — rename the file to .mts or .m2ts and VLC, mpv, and most editors will open it.BDMV directory (often under PRIVATE/AVCHD) with index and clip-info files alongside the stream. A single stream file has none of that scaffolding and will not mount as a disc..ico stores several bitmaps, and the converter reads the first one in the file — which is not necessarily the biggest, since many icon editors write smallest-first. Re-save the icon with only the size you want, or start from the original artwork.If your real goal is a usable copy of the icon, stop converting to video: ICO to PNG keeps the alpha channel and every pixel intact, and ICO to GIF gives you a small palette image with 1-bit transparency. If you need something that plays, ICO to MP4 writes the same H.264 picture into a container that browsers, phones, and editors all accept — AVCHD gains you nothing unless a specific device demands a transport stream. And if you arrived here from the other direction, with camcorder footage you cannot open, the conversion you want is MTS to MP4.
Because the page's output format is named AVCHD, the file is written with that extension. The contents are an ordinary MPEG transport stream — the same bytes a camcorder writes to a .mts file. Renaming it to .mts or .m2ts is safe and makes players and editors recognise it immediately.
No. AVCHD as a consumer standard is a directory layout — a BDMV folder holding stream, clip-information, playlist, and index files — that camcorders and set-top players read as a unit. What this conversion produces is one stream file from that layout. It plays in software, but it is not a mountable AVCHD disc structure, and no single-file conversion can create one.
None at all. AVCHD itself supports Dolby AC-3 and uncompressed linear PCM, in stereo or 5.1, but an icon has no sound to encode. The pipeline skips audio entirely for image sources, which is why the Audio Codec control never appears on this page. Add music or narration afterwards in a video editor.
One frame per second, with B-frames turned off. A five-second clip is therefore five identical frames. That is deliberate: B-frames on identical pictures only add a start-time delay, and a higher frame rate would multiply the file size without changing anything you can see.
The first image stored in the file. An .ico is a directory of bitmaps, and the decoder reads entry zero rather than searching for the largest. Icon editors commonly write the smallest entry first, so a favicon bundling 16x16, 32x32, 48x48, and 256x256 can convert at 16x16. If the result is smaller than you expected, export the size you want as its own file and convert that.
No, and no video format could keep it. Transparent and semi-transparent pixels are composited onto the Background Color before encoding — white unless you change it — and the same colour fills any padding around the square icon. If you need the alpha channel, keep the file as an image with ICO to PNG.
Transport streams are built for broadcast and recording, not for economy: every byte of video is packed into fixed 188-byte packets with their own headers, and program tables are repeated throughout the file. For a five-second clip of one static frame, that overhead is a noticeable share of the total. An MP4 of the same frames stores its metadata once and comes out smaller.
Each .ico travels to us over an encrypted connection, is decoded and encoded on our servers, and is deleted automatically a few hours later. There is no sign-up, no watermark, and files are never shared or made public. In practice the only limit that bites on this conversion is upload time, since icon files are measured in kilobytes.