About the Frame Controls Pane

Using frame controls, you can do any of the following at levels of quality that were previously available only through expensive hardware solutions:

  • Convert video files between international television standards such as PAL to NTSC, or NTSC to PAL.

  • Downconvert high definition (HD) video sources to standard definition (SD), or upconvert SD to HD.

  • Convert a progressive stream to an interlaced one, or interlaced to progressive.

  • Make high-quality frame rate adjustments, including high-quality slow-motion effects.

  • Automatically remove telecine pull-down (reverse telecine).

The Advanced Format Conversions settings group in the Settings tab has particular relevance to working with frame controls.

Important: Frame Controls settings cannot be previewed in the Preview window. To preview Frame Controls settings, do a test transcode of a small section of your source media file. (See Transcoding a Portion of the Clip with the Preview Window for more information.)

Use the following features in the Frame Controls pane of the Inspector to select and adjust frame controls attributes that you want to assign to your settings.

Figure. Frame Controls pane of the Inspector window.
Frame Controls Area

Use this pop-up menu to enable or disable the Frame Controls feature. Use the corresponding Automatic button to enable or disable automatic mode.

Figure. Frame Controls pop-up menu.
  • Automatic button: When this button is selected, Compressor analyzes the transcoding job (the source media file and the applied setting), and then automatically determines the appropriate Frame Controls attributes. For more information, see About the Automatic Settings.

    In Automatic mode, Frame Controls technology is engaged in the following two types of transcodes only:

    • Transcoding from high definition (HD) sources to standard definition (SD) MPEG-2 output files

    • Transcoding from interlaced sources to H.264 for Apple Devices (progressive) output files

Resizing Controls Area

Use the controls in this area to choose the algorithm with which frames are resized.

  • Adaptive Details: Select this checkbox to use advanced image analysis to distinguish between noise and edge areas.
    Figure. Adaptive Details checkbox, Anti-alias slider, and Details Level slider.
  • Anti-alias: Use this slider to set a softness level from 0 to 100. This parameter improves the quality of conversions when you’re scaling media up. For example, when transcoding standard definition video to high definition, Anti-alias smooths out jagged edges that might appear in the image.
  • Details Level: Use this slider to set a level (from 0 to 100) to preserve sharp edges. This is a sharpening control that lets you add detail back to an image being enlarged. Unlike other sharpening operations, the Details Level setting is able to distinguish between noise and feature details, and generally doesn’t increase unwanted grain. Increasing this parameter may introduce jagged edges, however, which can be eliminated by increasing the Anti-alias level.

    Note: Adaptive Details, “Anti-alias,” and Details Level pertain only to frame resizing (scaling), not deinterlacing.

Retiming Controls Area

Use the controls in this area to choose the algorithm with which frame rates are adjusted.

Note: When you use the retiming controls to change the video speed, Compressor will also adjust the audio portion of the output media file so that it stays in sync with the video. The retiming controls will not affect the audio pitch. See Using the Retiming Controls for more information about using these options.

  • Set Duration to: Use this to choose one of three methods to convert the clip’s duration to a new duration.
    Figure. "Set Duration to" buttons.
    • Percent of source: Use this to enter a percentage value to modify the clip’s speed or choose a specific situation from the pop-up menu. For more information about the options in this radio button, see Entering a Percentage.
    • Total duration: Use this to choose a duration for the clip. For more information about the options in this radio button, see Entering a Duration.
    • So source frames play at [frame rate] fps: Use this when the source media file’s frame rate does not match the Encoder pane frame rate (shown as the frame rate for this item). For more information about the options in this radio button, see Forcing Frames to Play at the Encoder Pane’s Frame Rate Setting.