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Pre‑encoding tasks



In general, it’s best to apply certain processing options—such as deinterlacing and cropping—to an exported file before encoding it to a particular format. Doing so can prevent visual artifacts associated with performing the same tasks after encoding. These tasks are pre‑encoding tasks. The cropping options, deinterlacing options, and filters options you specify in the Export Settings dialog box are applied before encoding.
Note: You can access the Gaussian Blur filter option (a pre‑encoding task) by selecting the Filters tab.

Automatic deinterlacing

Adobe Media Encoder deinterlaces video before encoding whenever you choose to encode an interlaced source to a noninterlaced output.

Crop the source before encoding

  1. In the Export Settings dialog box, select the Source tab.
  2. Select the Crop button and do any of the following:

    • To crop the image interactively, drag the sides or corner handles of the crop box around the source image.

    • To crop numerically, enter the values for Left, Top, Right, Bottom, in pixels.

    • To constrain the proportion of the cropped image, choose an option from the Crop Proportions menu.

  3. Click the Output tab to preview the cropped image.
  4. From the Crop Setting menu, choose one of the following:
    Scale To Fit
    To eliminate letterboxing and pillarboxing resulting from cropping, or from using video of different pixel size.

    Black Borders
    Applies a black border to the video even if the target dimension is smaller than the source video.

    Change Output Size
    To automatically set the frame height and frame width of the output to the height and width of the cropped frame. Choose this setting if you want to export content for use with Flash Player or other web applications without black borders such as those used with letterboxing or pillarboxing.

    Exporting video at the same dimensions or aspect ratio as the source video will prevent the black borders created when scaling or cropping.
    Note: The minimum size to which you can crop an image is 40 pixels by 40 pixels.