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
|
|
| no
| ( displayed in image) | |
Tags extracted from GIF89a application extensions.
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
| | |
Information extracted from the "NETSCAPE2.0" animation extension.
| Index1
| Tag Name
| Writable
| Values / Notes
|
| 1
| AnimationIterations
| no
| | |
Information extracted from the GIF logical screen descriptor.
| Index1
| Tag Name
| Writable
| Values / Notes
|
| 0
| Image
| no
|
|
| 2
| Image
| 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
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