## GIF Tags

This table lists information extracted from GIF images. See http://www.w3.org/Graphics/GIF/spec-gif89a.txt for the official GIF89a specification.

> Tag Name | Writable | Values / Notes
> --- | --- | ---
> Comment | yes |
> Duration | no | (duration of a single animation iteration)
> Extensions | - | --> GIF Extensions Tags
> FrameCount | no | (number of animated images)
> GIFVersion | no |
> ScreenDescriptor | - | --> GIF Screen Tags
> Text | no | (text displayed in image)

## GIF Extensions Tags

Tags extracted from GIF89a application extensions.

> Tag ID | Tag Name | Writable | Values / Notes
> --- | --- | --- | ---
> 'ICCRGBG1/012' | ICC_Profile | yes | --> ICC_Profile Tags
> 'MIDICTRL/Jon' | MIDIControl | - | --> GIF MIDIControl Tags
> 'MIDISONG/Dm7' | MIDISong | no |
> 'NETSCAPE/2.0' | Animation | - | --> GIF Animation Tags
> 'XMP Data/XMP' | XMP | yes | --> XMP Tags

## GIF MIDIControl Tags

Information extracted from the MIDI control block extension.

> Index1 | Tag Name | Writable | Values / Notes
> --- | --- | --- | ---
> 0 | MIDIControlVersion | no |
> 1 | SequenceNumber | no |
> 2 | MelodicPolyphony | no |
> 3 | PercussivePolyphony | no |
> 4 | ChannelUsage | no |
> 6 | DelayTime | no |

## GIF Animation Tags

Information extracted from the "NETSCAPE2.0" animation extension.

> Index1 | Tag Name | Writable | Values / Notes
> --- | --- | --- | ---
> 1 | AnimationIterations | no |

## GIF Screen Tags

Information extracted from the GIF logical screen descriptor.

> Index1 | Tag Name | Writable | Values / Notes
> --- | --- | --- | ---
> 0 | ImageWidth | no |
> 2 | ImageHeight | no |
> 4.1 | HasColorMap | no | [val >> 7 & 0x1] 0 = No 1 = Yes
> 4.2 | ColorResolutionDepth | no | [val >> 4 & 0x7]
> 4.3 | BitsPerPixel | no | [val & 0x7]
> 5 | BackgroundColor | no |
> 6 | PixelAspectRatio | no |

(This document generated automatically by Image::ExifTool::BuildTagLookup)
Last revised Oct 29, 2020

<-- ExifTool Tag Names