Content Width and Height
The width and height specify the size of the video in pixels.
Our transcoding system maintains the aspect ratio of the source video using the width and scaling the height accordingly.
If a device such as a phone or tablet cannot support the width of a video, it will not be play. Additionally, phones and tablets are often connected to the Internet through lower bandwidth connections. As a result, you will want to make sure your lower bit rate encodings have a smaller width. For example, if you created an encoding with a 1280 width and a 300kbps bit rate, it would not be able to play on an iPhone with a maximum width of 640.
Larger screens look better in higher resolution and tend to have better bandwidth. Reserve your higher bit rate encodings for larger widths. For example, you might specify a width of 1280 for your 1500, 2200, and 3600kbps bit rate encodes.
The following table shows the width and height of common devices.
|iPhone 3GS||640 or lower||480 or lower|
|iPhone 4/4S/5||960 or lower||640 or lower|
|iPad 1/2||1024 or lower||768 or lower|
|iPad 3/4||2048 or lower||1536 or lower|
|Apple TV||640 or higher||320 or higher|
|Android||varies (960 or less recommended)||varies (640 or less recommended)|
|Desktop/Notebook||varies (1280 recommended)||varies (720 recommended)|
|TV||varies (1920 or less recommended)|
Note: If you specify a width of 0 in your encoding profile, the content uses the source file’s width.
Flash playback and video encoding works best with even numbers. Widths with multiples of 16 are best, but 8, 4, and 2 are also acceptable. Common widths are 400, 480, 520, 640, 800, 1280.