調整大小政策和長寬比 - Amazon Elastic Transcoder
長寬比縮圖

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調整大小政策和長寬比

您選擇的大小調整政策會影響 EElastic Transcoder 套用至輸出影像的縮放比例，如下表所示。

調整大小政策

輸出影像可能會放大

若填補政策為「Pad」，可能會對輸出影像進行填補

輸出影像的像素長寬比可能會和輸入影像不同

輸出影像可能會被裁切

符合

是

是

 

 

填滿

是

 

 

是

Stretch

是

 

是

 

維持

 

是

 

是

ShrinkToFit

 

是

 

 

ShrinkToFill

 

是

 

是

長寬比縮圖

下表顯示 Sizing Policy (調整大小政策)、Padding Policy (填補政策)、Max Height (高度上限) 和 Max Width (寬度上限) 如何與輸出影像互動。

符合

如果您選擇適合您的尺寸規則，EElastic Transcoder 會縮放您的輸入文件，直到它符合輸出圖像的尺寸，而不會超過輸出圖像的尺寸。

例如，如果您的輸入檔案是以200像素為單位的200像素，而您想要一個以300像素為單位的輸出影400像，則 EElastic Transcoder 會將檔案的大小逐個300像素增加為300像素，並將填補政策套用至檔案側邊。如果您為填充策略選擇未填充，Elastic Transcoder 將逐300像300素文件返回作為輸出。如果您選擇填充，Elastic Transcoder 會在輸出的任一側添加填充50像素，並逐個像素文件返回一個300像400素。

索引鍵

長寬比金鑰

條件

輸入

輸出: NoPad

輸出：填補

輸入寬度 < 輸出寬度上限

輸入高度 < 輸出高度上限
Blue user icon with dimensions labeled: 200x200 inner square, 300x400 outer rectangle.
Blue figure icon with size dimensions labeled around it: 400 width, 300 height, 200 top and left.
Diagram showing a blue figure icon centered within a frame with dimensions labeled.

輸入寬度 < 輸出寬度上限

輸入高度 > (>) 輸出高度上限
Blue pawn-shaped figure on a checkered background with red measurement lines.
Diagram showing a blue figure centered in a 400x200 pixel area with surrounding measurements.
Diagram showing a blue figure centered within a white rectangle surrounded by black bars.

輸入寬度 > (>) 輸出寬度上限

輸入高度 < 輸出高度上限
Blue user icon centered within a rectangular frame with dimensions labeled.
Diagram showing a rectangle with dimensions 400x300 inside a larger 500x200 area.
Diagram showing dimensions of a rectangle: 500 width, 400 height, with inner area of 300x200.

輸入寬度 > (>) 輸出寬度上限

輸入高度 > (>) 輸出高度上限
Blue silhouette icon of a person within a red square frame on a grid background.
Blue 3D figure resembling a snowman or stacked spheres centered in a square frame.
Blue 3D snowman-like figure centered within nested squares on a checkered background.

Fill

如果您為大小策略選擇填充，EElastic Transcoder 會縮放輸入文件，直到填充輸出圖像的尺寸為止，並裁剪超出輸出圖像尺寸的任何內容。

例如，如果您的輸入文件是以200像素為200單位的像素，並且您想要一個逐300像素的輸出圖400像，則 EElastic Transcoder 將輸入的大小逐個400像素增加為400像素，裁剪掉頂部和底部50像素，並返回300像素逐400個像素文件。Elastic Transcoder 不使用填充政策的填充。

索引鍵

長寬比金鑰

條件

輸入

輸出: NoPad

輸出：填補

輸入寬度 < 輸出寬度上限

輸入高度 < 輸出高度上限
Blue user icon with dimensions labeled: 200x200 inner square, 300x400 outer rectangle.
Blue figure icon with dimensions and sizing information overlaid on a checkered background.
Blue figure icon with dimensions and sizing information overlaid on a checkered background.

輸入寬度 < 輸出寬度上限

輸入高度 > (>) 輸出高度上限
Blue pawn-shaped figure on a checkered background with red measurement lines.
Diagram showing a blue figure with dimensions: 200 height, 300 width, 400 total height.
Diagram showing a blue figure with dimensions: 200 height, 300 width, 400 total height.

輸入寬度 > (>) 輸出寬度上限

輸入高度 < 輸出高度上限
Blue user icon centered within a rectangular frame with dimensions labeled.
Blue hourglass-shaped icon with numerical values indicating dimensions around it.
Blue hourglass-shaped icon with numerical values indicating dimensions around it.

輸入寬度 > (>) 輸出寬度上限

輸入高度 > (>) 輸出高度上限
Blue silhouette icon of a person within a red square frame on a grid background.
Blue 3D figure centered in a square frame with measurement indicators on the sides.
Blue 3D figure centered in a square frame with measurement indicators on the sides.

Stretch

如果您為大小規模政策選擇「延伸」，則 EElastic Transcoder 會延伸或縮小輸入檔案，直到輸入檔案的尺寸符合為止。

例如，如果您的輸入檔案是以200像素為單位的200像素，而您想要一個以300像素為單位的輸出影400像，則 EElastic Transcoder 會將輸入的大小逐個300像素增加為像400素，從而扭曲輸出圖像的比例。Elastic Transcoder 不會對拉伸政策使用填充或裁剪。

索引鍵

長寬比金鑰

條件

輸入

輸出: NoPad

輸出：填補

輸入寬度 < 輸出寬度上限

輸入高度 < 輸出高度上限
Blue user icon with dimensions labeled: 200x200 inner square, 300x400 outer rectangle.
Blue 3D object resembling a chess pawn piece with dimensions labeled around it.
Blue 3D object resembling a chess pawn piece with dimensions labeled around it.

輸入寬度 < 輸出寬度上限

輸入高度 > (>) 輸出高度上限
Blue pawn-shaped figure on a checkered background with red measurement lines.
Diagram showing dimensions of a blue cylindrical object on a checkered background.
Diagram showing dimensions of a blue cylindrical object on a checkered background.

輸入寬度 > (>) 輸出寬度上限

輸入高度 < 輸出高度上限
Blue user icon centered within a rectangular frame with dimensions labeled.
Diagram showing a blue bowling pin shape centered within nested rectangles and numerical labels.
Diagram showing a blue bowling pin shape centered within nested rectangles and numerical labels.

輸入寬度 > (>) 輸出寬度上限

輸入高度 > (>) 輸出高度上限
Blue silhouette icon of a person within a red square frame on a grid background.
Blue 3D figure resembling a snowman or stacked spheres centered in a square frame.
Blue 3D figure resembling a snowman or stacked spheres centered in a square frame.

維持

如果您針對大小規模政策選擇 [保留]，Elastic Transcoder 不會縮放您的輸入檔案。Elastic Transcoder 會裁剪或填充您的輸入文件，直到它與輸出圖像的尺寸匹配。

例如，如果您的輸入檔案是以400像素為單位的200像素，而您想要一個以300像素為單位的輸出影300像，則 EElastic Transcoder 會從頂端和底部裁切100像素，並將填補政策套用至側邊。如果您為填充策略選擇未填充，Elastic Transcoder 將返回一個逐300200像素的輸出文件。如果選擇填充，Elastic Transcoder 將逐個像素文件返回一個300像300素。

索引鍵

長寬比金鑰

條件

輸入

輸出: NoPad

輸出：填補

輸入寬度 < 輸出寬度上限

輸入高度 < 輸出高度上限
Blue user icon with dimensions labeled: 200x200 inner square, 300x400 outer rectangle.
Diagram showing a blue user icon surrounded by numbered dimensions: 200, 300, and 400.
Diagram showing a centered image with dimensions labeled: 200x200 inner, 400x300 outer.

輸入寬度 < 輸出寬度上限

輸入高度 > (>) 輸出高度上限
Blue pawn-shaped figure on a checkered background with red measurement lines.
Blue figure icon with dimensions and grid background indicating size specifications.
Blue figure icon with dimensions and measurements indicated around it.

輸入寬度 > (>) 輸出寬度上限

輸入高度 < 輸出高度上限
Blue user icon centered within a rectangular frame with dimensions labeled.
Diagram showing a blue user icon centered within nested rectangles with labeled dimensions.
Diagram showing image dimensions: 500 width, 400 height, with 200 left and 300 right margins.

輸入寬度 > (>) 輸出寬度上限

輸入高度 > (>) 輸出高度上限
Blue silhouette icon of a person within a red square frame on a grid background.
Blue figure icon centered within red square frame on checkered background.
Blue figure icon centered within red square frame on checkered background.

縮小以符合

如果您選擇縮小以適合您的大小規模政策，Elastic 轉碼器會減小輸入文件的大小，直到它符合輸出文件的尺寸，而不會超過輸出圖像的任何尺寸。如果您的輸入文件小於輸出圖像，則 Elastic Transcoder 不會增加文件的大小。

例如，如果您的輸入文件是400像素逐個像400素，並且您想要一個逐200300像素的輸出圖像，則 EElastic Transcoder 會將您的輸入逐個像素縮小為200像200素，並應用填充策略。如果您為填充策略選擇未填充，Elastic Transcoder 將200按200像素文件作為輸出返回。如果您選擇填充，Elastic Transcoder 會在輸出的任一側添加填充50像素，並逐個像素文件返回一個300像300素。

索引鍵

長寬比金鑰

條件

輸入

輸出: NoPad

輸出：填補

輸入寬度 < 輸出寬度上限

輸入高度 < 輸出高度上限
Blue user icon with dimensions labeled: 200x200 inner square, 300x400 outer rectangle.
Diagram showing a blue user icon surrounded by numbered dimensions: 200, 300, and 400.
Diagram showing a centered image with dimensions labeled: 200x200 inner, 400x300 outer.

輸入寬度 < 輸出寬度上限

輸入高度 > (>) 輸出高度上限
Blue pawn-shaped figure on a checkered background with red measurement lines.
Diagram showing a blue figure centered in a 400x200 pixel area with surrounding measurements.
Diagram showing a blue figure centered within a white rectangle surrounded by black bars.

輸入寬度 > (>) 輸出寬度上限

輸入高度 < 輸出高度上限
Blue user icon centered within a rectangular frame with dimensions labeled.
Diagram showing a rectangle with dimensions 400x300 inside a larger 500x200 area.
Diagram showing dimensions of a rectangle: 500 width, 400 height, with inner area of 300x200.

輸入寬度 > (>) 輸出寬度上限

輸入高度 > (>) 輸出高度上限
Blue silhouette icon of a person within a red square frame on a grid background.
Blue 3D figure resembling a snowman or stacked spheres centered in a square frame.
Blue 3D snowman-like figure centered within nested squares on a checkered background.

縮小以填滿

如果您為大小策略選擇「縮小以填充」，則 EElastic Transcoder 會減小輸入文件的大小，直到填充輸出圖像的尺寸為止，裁剪不適合輸出圖像的任何內容，並應用填充策略。如果您的輸出圖像大於輸入文件，則 Elastic Transcoder 不會增加文件的大小。

例如，如果您的輸入檔案是以400像素為單位的200像素，而您想要一個以200像素為單位的輸出影300像，則 EElastic Transcoder 會從側邊裁切100像素，並將填補政策套用至檔案的頂端和底部。如果您為填充策略選擇未填充，Elastic Transcoder 將返回一個逐200200像素的輸出文件。如果選擇填充，Elastic Transcoder 將逐個像素文件返回一個200像300素。

索引鍵

長寬比金鑰

條件

輸入

輸出: NoPad

輸出：填補

輸入寬度 < 輸出寬度上限

輸入高度 < 輸出高度上限
Blue user icon with dimensions labeled: 200x200 inner square, 300x400 outer rectangle.
Diagram showing a blue user icon surrounded by numbered dimensions: 200, 300, and 400.
Diagram showing a centered image with dimensions labeled: 200x200 inner, 400x300 outer.

輸入寬度 < 輸出寬度上限

輸入高度 > (>) 輸出高度上限
Blue pawn-shaped figure on a checkered background with red measurement lines.
Blue figure icon with dimensions and grid background indicating size specifications.
Blue figure icon with dimensions and measurements indicated around it.

輸入寬度 > (>) 輸出寬度上限

輸入高度 < 輸出高度上限
Blue user icon centered within a rectangular frame with dimensions labeled.
Diagram showing a blue user icon centered within nested rectangles with labeled dimensions.
Diagram showing image dimensions: 500 width, 400 height, with 200 left and 300 right margins.

輸入寬度 > (>) 輸出寬度上限

輸入高度 > (>) 輸出高度上限
Blue silhouette icon of a person within a red square frame on a grid background.
Blue 3D figure centered in a square frame with measurement indicators on the sides.
Blue 3D figure centered in a square frame with measurement indicators on the sides.