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Support-DVD5-Tutorials > General-4  
 
faq
4. How to check the encoder map?

 One of the most important issues in MPEG editing is to ensure that the original video is NOT re-encoded. MPEG compression has its flaws: for every encoding processing, the image quality slightly degrades. For this reason, the Automatic should always be used for the "Save as type" selection, if you want minimal loss of image quality to result in the final MPEG output.

However, if you do select a different template for your output, if you have added a lot of video fades and transitions, or if you are not sure about your "Save as type" selection, you can check the Encode Map display.

The Encode Map display draws two colored strips for the export encoding selection, with RED color indicating re-encoding and BLUE color indicating stream-copy.

The above encode map is corresponding to a sample editor project as shown in the timeline blow. In this example, the re-encoded sections are, starting from the beginning (left) to the end (right) of the timeline, 1 second fade-in, 2 second transition, 1 second fade-out, 5 second image plus text title, 1 second fade-in, 2 second transition, and 1 second fade-out.

Since the total length of the project is 75.74 seconds, and the total length of the re-encoded sections is about 13.00 seconds, the division of the two types of export are 17.20% re-encoding and 82.80% stream-copy, excluding the slight difference between video and audio due the rounding error and their different frame lengths.

You could open the encode map display during your selection for an export file name, by pressing the Detail button on the Save As file window.

You could also view the encode map display during or before an export job by pressing the Detail button on the Monitor tab of the Export window.

 

 

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