Compressor 4 - MPEG-1 File Format Specifications

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MPEG-1 File Format Specifications

MPEG-1 video encoding uses a process very similar to that used in MPEG2
encoding—many of the same terms and settings apply. In Compressor, the encoding
settings are set as follows.

Encoding mode: One pass

GOP structure: Open

GOP pattern: BBIBBP


Chapter 17

Creating MPEG-1 Output Files

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GOP length: 15 frames for NTSC; 12 frames for PAL

These settings are fixed and apply to all Compressor MPEG-1 video output files. See



for information about Group of Pictures (GOP) settings. See

Quality Tab

for information

on the encoding mode.

The MPEG-1 output files can have I-frames forced on specific frames by placing
compression markers on them. These markers can be added to the source media file
using Final Cut Pro or can be added manually in the Preview window. See

Working with

Markers and Poster Frames

for more information.

The MPEG-1 format does not support named chapter markers.