What is AAAAIGZ0eXBpc29t?
Base64 MP4 video prefix
AAAAIGZ0eXBpc29tAAACAGlzb21pc28yYXZjMW1wNDE=
| Decoded type | MP4 video (video/mp4) |
|---|---|
| 解码后大小 | 32 B |
| Base64 length | 44 characters |
00 00 00 20 66 74 79 70 69 73 6F 6D 00 00 02 00 69 73 6F 6D 69 73 6F 32 61 76 63 31 6D 70 34 31
Explanation
MP4, MOV and M4A files start with an ftyp box. AAAAIGZ0eXBpc29t decodes to the size of the first box (32 bytes) followed by ftypisom, the most common MP4 brand.
You will often find it inside data:video/mp4;base64,AAAAIGZ0eXA… URIs in HTML and JSON. Paste the complete value into the Base64 to Video decoder to watch it.
You can decode any similar value yourself with the Base64 decoder, or identify a file from its first characters with the Base64 to File converter.
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