diff --git a/go.mod b/go.mod
index 6ff131a..d7d199d 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,7 @@ module github.com/cshum/imagorvideo
 go 1.18
 
 require (
-	github.com/cshum/imagor v1.1.10-0.20221010125033-19ba144615af
+	github.com/cshum/imagor v1.1.10-0.20221011084155-100ed56d3c84
 	github.com/gabriel-vasile/mimetype v1.4.1
 	github.com/stretchr/testify v1.8.0
 	go.uber.org/zap v1.23.0
@@ -14,7 +14,7 @@ require (
 	cloud.google.com/go/compute v1.7.0 // indirect
 	cloud.google.com/go/iam v0.3.0 // indirect
 	cloud.google.com/go/storage v1.27.0 // indirect
-	github.com/aws/aws-sdk-go v1.44.106 // indirect
+	github.com/aws/aws-sdk-go v1.44.114 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
 	github.com/golang/protobuf v1.5.2 // indirect
diff --git a/go.sum b/go.sum
index 72d43e7..20b5f37 100644
--- a/go.sum
+++ b/go.sum
@@ -66,8 +66,8 @@ github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym
 github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
 github.com/alexbrainman/goissue34681 v0.0.0-20191006012335-3fc7a47baff5 h1:iW0a5ljuFxkLGPNem5Ui+KBjFJzKg4Fv2fnxe4dvzpM=
 github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
-github.com/aws/aws-sdk-go v1.44.106 h1:FzINxRGt0gAzz01ixtKfkjiDOnnpd/uNbstW/qPW2QE=
-github.com/aws/aws-sdk-go v1.44.106/go.mod h1:y4AeaBuwd2Lk+GepC1E9v0qOiTws0MIWAX4oIKwKHZo=
+github.com/aws/aws-sdk-go v1.44.114 h1:plIkWc/RsHr3DXBj4MEw9sEW4CcL/e2ryokc+CKyq1I=
+github.com/aws/aws-sdk-go v1.44.114/go.mod h1:y4AeaBuwd2Lk+GepC1E9v0qOiTws0MIWAX4oIKwKHZo=
 github.com/benbjohnson/clock v1.1.0 h1:Q92kusRqC1XV2MjkWETPvjJVqKetz1OzxZB7mHJLju8=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
 github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
@@ -85,8 +85,8 @@ github.com/cncf/xds/go v0.0.0-20210805033703-aa0b78936158/go.mod h1:eXthEFrGJvWH
 github.com/cncf/xds/go v0.0.0-20210922020428-25de7278fc84/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
 github.com/cncf/xds/go v0.0.0-20211001041855-01bcc9b48dfe/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
 github.com/cncf/xds/go v0.0.0-20211011173535-cb28da3451f1/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
-github.com/cshum/imagor v1.1.10-0.20221010125033-19ba144615af h1:56ja1GAbhJ4AFDfnxQawcdAl1Ni010WOtdylJWOwD00=
-github.com/cshum/imagor v1.1.10-0.20221010125033-19ba144615af/go.mod h1:7DEd2qtXj469uYoAj5SskR7GZKzwFowIhqYw/x3tlM4=
+github.com/cshum/imagor v1.1.10-0.20221011084155-100ed56d3c84 h1:MQSxty/I5LxE3LXWbm9gUhI9UqusQVB3Sr2wCef2nzA=
+github.com/cshum/imagor v1.1.10-0.20221011084155-100ed56d3c84/go.mod h1:6HJX2R4KlDkAtjXgWI42k1efPYRV179Ud4K7RTI0OMo=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
diff --git a/processor.go b/processor.go
index d44ad86..66c848b 100644
--- a/processor.go
+++ b/processor.go
@@ -8,7 +8,6 @@ import (
 	"github.com/gabriel-vasile/mimetype"
 	"go.uber.org/zap"
 	"io"
-	"os"
 	"strings"
 )
 
@@ -78,48 +77,40 @@ func (p *Processor) Process(ctx context.Context, in *imagor.Blob, params imagorp
 		out = in
 		return
 	}
-	var reader io.ReadCloser
+	var r io.ReadCloser
+	var rs io.ReadSeekCloser
 	var size int64
 	switch mime {
 	case "video/webm", "video/x-matroska":
 		// media types that does not require seek
-		if reader, size, err = in.NewReader(); err != nil {
+		if r, size, err = in.NewReader(); err != nil {
 			return
 		}
-	default:
-		reader, size, err = in.NewReadSeeker()
+		if size <= 0 {
+			// size must be known
+			_ = r.Close()
+			r = nil
+		}
 	}
-	if reader == nil || size <= 0 {
-		// write to temp file if read seeker not available or size unknown
-		if reader == nil {
-			if reader, _, err = in.NewReader(); err != nil {
-				return
-			}
-		}
-		var file *os.File
-		if file, err = os.CreateTemp("", "imagor-"); err != nil {
-			return
-		}
-		var filename = file.Name()
-		defer func() {
-			_ = os.Remove(filename)
-			p.Logger.Debug("cleanup", zap.String("file", filename))
-		}()
-		if size, err = io.Copy(file, reader); err != nil {
-			return
-		}
-		p.Logger.Debug("temp",
-			zap.String("file", filename),
-			zap.Int64("size", size))
-		_ = file.Close()
-		if reader, err = os.Open(filename); err != nil {
+	if r == nil {
+		if rs, size, err = in.NewReadSeeker(); err != nil {
 			return
 		}
+		r = rs
 	}
 	defer func() {
-		_ = reader.Close()
+		_ = r.Close()
 	}()
-	av, err := ffmpeg.LoadAVContext(ctx, reader, size)
+	if size <= 0 && rs != nil {
+		// size must be known
+		if size, err = rs.Seek(0, io.SeekEnd); err != nil {
+			return
+		}
+		if _, err = rs.Seek(0, io.SeekStart); err != nil {
+			return
+		}
+	}
+	av, err := ffmpeg.LoadAVContext(ctx, r, size)
 	if err != nil {
 		return
 	}