script.sh

#!/usr/bin/bash

queueUrl=https://<my-secret-queue>.fifo
uploadsBucket=<my-secret-bucket>
fromEmail=<my-secret-email>

while true; do
        echo "Long polling for SQS messages.."
        sqsResponse=`aws sqs receive-message --queue-url $queueUrl --max-number-of-messages 1 --wait-time-seconds 20 --region us-east-1`

        if [[ -z $sqsResponse ]]; then
                echo "No messages"
        else
                body=`echo $sqsResponse | jq -r '.Messages[0].Body'`
                receiptHandle=`echo $sqsResponse | jq -r '.Messages[0].ReceiptHandle'`
                bucket=`echo $body | jq -r '.bucket'`
                key=`echo $body | jq -r '.key'`

                echo $bucket
                echo $key
                echo $receiptHandle

                echo "Copying $bucket/$key from S3.."
                aws s3 cp s3://$bucket/$key incoming/vid.mp4 --region us-east-1

                echo "Retrieving object email tag.."
                email=`aws s3api get-object-tagging --bucket $bucket --key $key | jq -r '.TagSet[0].Value'`

                echo "Stabilizing.."
                ./ffmpeg-4.1-64bit-static/ffmpeg -i incoming/vid.mp4 -vf vidstabdetect=stepsize=6:shakiness=5:accuracy=15:result=transform_vectors.trf -f null -
                ./ffmpeg-4.1-64bit-static/ffmpeg -i incoming/vid.mp4 -vf vidstabtransform=input=transform_vectors.trf:zoom=0:smoothing=30:crop=black,unsharp=5:5:0.8:3:3:0.4 -vcodec libx264 -preset slow -tune film -crf 18 -acodec copy outgoing/vid.mp4

                echo "Copying result to S3.."
                aws s3 cp outgoing/vid.mp4 s3://$uploadsBucket/stabilized/$key --region us-east-1

                echo "Obtaining presigned download url.."
                downloadUrl=`aws s3 presign s3://$uploadsBucket/stabilized/$key --expires-in 14400` # 4 hour expiration

                echo "Emailing download url.."
                aws ses send-email --to $email --text "Download your video at $downloadUrl" --subject "No Reply - Your video is ready" --from $fromEmail

                echo "Deleting SQS message.."
                aws sqs delete-message --queue-url $queueUrl --receipt-handle $receiptHandle --region us-east-1

                echo "Clean up.."
                rm transform_vectors.trf
                rm incoming/vid.mp4
                rm outgoing/vid.mp4
        fi
done

echo "Script done."