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Appendix: MPEG Encoder Settings 387
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Appendix: MPEG Encoder Settings
General settings
MPEG type: Set the output type of the created MPEG file. You can adjust the
encoder settings freely (to export your video in the corresponding format, for
instance) for further use in other programs or on your own website.
If you open the encoder from a burn dialog, or intend to use the exported
material for VCDs, SVCDs or DVDs, then select the corresponding option. This
will adjust the settings of the encoder according to the standards required for
the corresponding discs to be played in a compatible player.
Video format: Automatically specifies the video format, aspect ratio, and frame
rate (see video settings (view page 388)). You can choose between PAL or
NTSC.
Interlace mode: The movie is encoded interlaced (i.e. in two half-screens, so-
called fields). This is essential for later playback on TV screens. If you want to
view the exported movie on your PC only and like a "cinemascope" view, you
can also encode by frame (progressively). Some video projectors also support
playback of progressively encoded image material. See Interlace (view page
395).
Bit ra
te: The bit rate determines the memory requirement by the completed
video. The amount of data available can be used differently for different display
modes. 20 MB can be 4 seconds of DVD video, or 5 minutes of Internet
streaming at the thumbnail size. The quality of an MPEG video is measured by
the width of the created data stream, i.e. the bit rate. This is the amount of
transmitted data per time unit and is indicated in kBit/s or bit per second.
Quality: Determines the quality of the encoding process, or the quality of the
movement (view page 392) to be more precise. The higher the quality, the
better
the finished video will look, but encoding will take considerably longer.
The preset value "10" is a good compromise between speed and quality.
Smart Rendering: Smart Rendering can considerably reduce the
encoding/processing strain of MPEG files. The production of MPEG files re-
encodes only those parts of the movie that were changed in the program (e.g.
by video cleaning or effects). Please note: The MPEG files contained in the
movie must have the same format, i.e. the bit rates (variable or constant),
audio formats, image resolutions, and video formats must match.