Unknown encoder 'libwebp_anim'

[alitaimoor1415]

Description
I am trying to create sticker from video using this. and i run this command
"ffmpeg -codecs | grep webp" and getting this results which is in "Current behavior".

Expected behavior
It should be support as encoder is available for libwebp and libwebp_anim.

Current behavior
flutter: configuration: --cross-prefix=arm64-ios-darwin- --sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator16.4.sdk --prefix=/Users/sue/Projects/arthenic

a/ffmpeg-kit/prebuilt/apple-ios-arm64-simulator/ffmpeg --pkg-config=/opt/homebrew/bin/pkg-config --enable-version3 --arch=aarch64 --cpu=armv8 --target-os=darwin --enable-neon --enable-asm --ar=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ar --cc=clang --cxx=clang++ --as='/Users/sue/Projects/arthenica/ffmpeg-kit/.tmp/gas-preprocessor.pl -arch aarch64 -- clang -arch arm64 -target arm64-apple-ios12.1-simulator -march=armv8-a+crc+crypto -mcpu=generic -DFFMPEG_KIT_ARM64_SIMULATOR -Wno-unused-function -Wno-deprecated-declarations -fstrict-aliasing -DIOS -DFFMPEG_KIT_BUILD_DATE=20230903 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator16.4.sdk -O2 -mios-simulator-version-mi<…>
flutter: libavutil 58. 2.100 / 58. 2.100
flutter: libavcodec 60. 3.100 / 60. 3.100
flutter: libavformat 60. 3.100 / 60. 3.100
flutter: libavdevice 60. 1.100 / 60. 1.100
flutter: libavfilter 9. 3.100 / 9. 3.100
flutter: libswscale 7. 1.100 / 7. 1.100
flutter: libswresample 4. 10.100 / 4. 10.100
flutter: Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Users/ali_mac/Library/Developer/CoreSimulator/Devices/1069CCA9-1586-4B31-88EB-CF8B90304EA7/data/Containers/Data/Application/D30151A7-5D2D-49FF-A81D-EF2FD60087F9/Documents/Trimmer/1733463535436401_trimmed:Dec6,2024-10:39:10.mp4':
flutter: Metadata:
flutter: major_brand :
flutter: isom
flutter:
flutter: minor_version :
flutter: 512
flutter:
flutter: compatible_brands:
flutter: isomiso2avc1mp41
flutter:
flutter: encoder :
flutter: Lavf60.3.100
flutter:
flutter: Duration:
flutter: 00:00:02.02
flutter: , start:
flutter: 0.042993
flutter: , bitrate:
flutter: 659 kb/s
flutter:
flutter: Stream #0:0
flutter: [0x1]
flutter: (und)
flutter: : Video: h264 (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 576x1026 [SAR 1:1 DAR 32:57], 530 kb/s
flutter: ,
flutter: 30 fps,
flutter: 30 tbr,
flutter: 15360 tbn
flutter: (default)
flutter:
flutter: Metadata:
flutter: handler_name :
flutter: VideoHandler
flutter:
flutter: vendor_id :
flutter: [0][0][0][0]
flutter:
flutter: encoder :
flutter: Lavc61.19.100 libx264
flutter:
flutter: Stream #0:1
[GETX] CLOSE DIALOG 580423593
flutter: [0x2]
flutter: (und)
flutter: : Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 126 kb/s
flutter: (default)
flutter:
flutter: Metadata:
flutter: handler_name :
flutter: SoundHandler
flutter:
flutter: vendor_id :
flutter: [0][0][0][0]
flutter:
flutter: [vost#0:0 @ 0x12cd87ed0] Unknown encoder 'libwebp_anim'
[ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: Exception: FFmpeg command failed with return code: 1
#0 _CreateStickerFromVideoScreenState._trimAndConvertToSticker. (package:action_take1/Screens/Viewer/widgets/create_sticker_screen.dart:100:13)

To Reproduce
by running this command:
final ffmpegCommand =
'-i "$outputPath" -vf "fps=10,scale=512:-1:flags=lanczos" '
'-c:v libwebp_anim -loop 0 -an -q:v 70 "$stickerPath"';

Screenshots
attaching screen shot.