ATI Technologies 137-40188-60 Using Your ATI Multimedia Center, To access MPEG properties

42 Using Your ATI Multimedia Center

Achieving the best results with MPEG video capture

To access MPEG properties

1Click the setup button in the Television control panel, then click the Digital VCR tab.

2In Recording Quality, click the Set Custom... button.

3Click Best Quality, then click the Edit... button. Capture Wizard (Step 1) appears.

4Enter a name and description (if desired) for the preset.

5Click Next >.

Capture Wizard (Step 2) appears.

6Select MPEG-1 or MPEG-2, then click Next >. Capture Wizard (Step 3) appears

To select I-frame-only MPEG capture

This uses less CPU, but requires 2 to 3 times the bit-rate, which produces larger files.

1Click the I Frames Only button.

2Click Next>, then click Finish.

To select I, B, P frame MPEG capture

This uses more CPU, but greatly reduces the bit-rate required to achieve good quality video.

1In Capture Wizard (Step 3), set Number of P Frames in Group to 4.

2Set Number of B Frames in Subgroup to 2. (Clicking the Default button sets the above values.)

To achieve full 29.97 frames/second capture performance in MPEG-1 or MPEG-2 format, we recommend the following settings. Example CPU speeds and bit rates (Mbps) are given, but note that some video compresses better than others, depending on the amount of rapid motion and the number of complex scenes.