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Using Windows Media Encoder, you can crop the edges of your input video image. For example, noise often occurs at the edges of an image, so you can crop one or more edges to eliminate the affected rows. You can specify how much to crop from each side of an image, or you can use default values for cropping. After cropping, you can resize the height and width of the output video. By default, the output video image is stretched to match the image size specified in the profile. However, you can resize the video so that the output image matches the dimensions of the cropped image. Or, you can have the video resize automatically to make use of the bandwidth specified in the profile. You can also specify custom resize dimensions.
If you are encoding MBR video, you can resize the output frame size for each bit rate separately. This means that an MBR file or stream can contain video images of varying sizes.
If you have multiple sources in a session, the output dimensions of the first source determine those of the subsequent sources. Therefore, it is only possible to resize the first source in a multisource session.
For best results, do not resize your output video. Resizing can result in suboptimal output. However, if you are encoding to a file by using the Windows Media Video 9 codec, and the time required to encode is not important, you can improve the quality of resized content by adjusting the encoder performance setting for the Encode to file option to better quality. Note that the encoding time increases significantly if you use this method.
Caution