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Chapter 9. Video and MPEG Tracks > Determining How a Video Track Was Compressed

Determining How a Video Track Was Compressed

Now that you know video tracks can be compressed with different compressors, you may be interested in finding out how a particular video track was compressed.

To determine how a video track was compressed:

1.
From the Movie menu, choose Get Movie Properties (Figure 9.4) to open the movie’s Properties window.

Figure 9.4. From the Movie menu, choose Get Movie Properties to open the Properties window for the movie.


2.
From the left pop-up menu, choose the video track; from the right pop-up menu, choose Format to open the Format panel (Figure 9.5).

Figure 9.5. Colors tells you the number of colors used in the image. Data Format indicates how the movie was compressed (if it was compressed).


The third line in the Format panel shows the number of colors in the image. The fourth line, Data Format, generally tells you how the track was compressed. In some cases (such as a track that was created by importing a still image and wasn’t compressed with a QuickTime codec), the Data Format instead lists the file format, such as GIF or FlashPix.


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