image/gif: gif: can't recognize format "RIFF\xac\xe4"

[dirslashls]

Go version

go version go1.21.6 darwin/amd64

Output of go env in your module/workspace:

GO111MODULE=''
GOARCH='amd64'
GOBIN=''
GOCACHE='/Users/userxyz/Library/Caches/go-build'
GOENV='/Users/userxyz/Library/Application Support/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFLAGS=''
GOHOSTARCH='amd64'
GOHOSTOS='darwin'
GOINSECURE=''
GOMODCACHE='/Users/userxyz/go/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='darwin'
GOPATH='/Users/userxyz/go'
GOPRIVATE=''
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/usr/local/go'
GOSUMDB='sum.golang.org'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/usr/local/go/pkg/tool/darwin_amd64'
GOVCS=''
GOVERSION='go1.21.6'
GCCGO='gccgo'
GOAMD64='v1'
AR='ar'
CC='clang'
CXX='clang++'
CGO_ENABLED='1'
GOMOD='/dev/null'
GOWORK='/Users/userxyz/git/gifti/go.work'
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
PKG_CONFIG='pkg-config'
GOGCCFLAGS='-fPIC -arch x86_64 -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -ffile-prefix-map=/var/folders/4s/03357nc94kg2j_2nlz7k217c0000gp/T/go-build707805457=/tmp/go-build -gno-record-gcc-switches -fno-common'

What did you do?

Tried to open the attached gif file using gif.DecodeAll

What did you see happen?

It gives the error gif: can't recognize format "RIFF\xac\xe4"

What did you expect to see?

Expecting it to successfully parse the gif.

Please note that this gif opens in all browsers, iMessage and iPhone. Not sure if the gif genuinely has an issue that all these other apps are able to workaround or it is an issue with golang's implementation.

[earthboundkid]

It's not a GIF, it's an animated WebP.

[thanm]

"file" reports

RIFF (little-endian) data, Web/P image

so as @earthboundkid pointed out, this isn't actually a GIF file. Sounds like you need to be using https://pkg.go.dev/golang.org/x/image/webp instead.

Closing, please re-open if you think there is anything to fix here.