An additional usage example to show the deployment of the layer from SAR and...

An additional usage example to show the deployment of the layer from SAR and reference of the layer from the consuming function.

example/template-sar.yaml

+AWSTemplateFormatVersion: 2010-09-09
+Transform: AWS::Serverless-2016-10-31
+Description: >
+  Example project demonstrating the deployment of the FFmpeg Layer for AWS Linux 2 runtimes via the AWS Serverless Application Repository, and its reference from within a function.
+
+Parameters:
+  ffmpegLambdaVersion:
+    Type: String
+    Default: 1.0.0
+    Description: The semantic version of the ffmpeg layer you wish to deploy.
+  ConversionFileType:
+    Type: String
+    Default: jpg
+  ConversionMimeType:
+    Type: String
+    Default: image/jpeg
+  ThumbWidth:
+    Type: Number
+    Default: 300
+    Description: Thumbnail width in pixels
+Resources:
+  UploadBucket:
+    Type: AWS::S3::Bucket
+
+  ResultsBucket:
+    Type: AWS::S3::Bucket
+
+  ffmpeglambdalayer:
+    Type: AWS::Serverless::Application
+    Properties:
+      Location:
+        ApplicationId: arn:aws:serverlessrepo:us-east-1:145266761615:applications/ffmpeg-lambda-layer
+        SemanticVersion: !Ref ffmpegLambdaVersion
+
+  ConvertFileFunction:
+    Type: AWS::Serverless::Function
+    Properties:
+      Handler: index.handler
+      Timeout: 180
+      MemorySize: 1024
+      Runtime: nodejs10.x
+      CodeUri: src
+      Layers:
+        - !GetAtt ffmpeglambdalayer.Outputs.LayerVersion
+      Policies:
+      - S3CrudPolicy:
+          BucketName: !Sub "${AWS::StackName}-*"
+      Environment:
+        Variables:
+          OUTPUT_BUCKET: !Ref ResultsBucket
+          EXTENSION: !Sub '.${ConversionFileType}'
+          MIME_TYPE: !Ref ConversionMimeType
+          THUMB_WIDTH: !Ref ThumbWidth
+      Events:
+        FileUpload:
+          Type: S3
+          Properties:
+            Bucket: !Ref UploadBucket
+            Events: s3:ObjectCreated:*
+
+Outputs:
+    UploadBucket:
+      Description: "Upload S3 bucket"
+      Value: !Ref UploadBucket
+    ResultsBucket:
+      Description: "Results S3 bucket"
+      Value: !Ref ResultsBucket