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
Creating MPEG-1 Output Files
• 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
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
Markers and Poster Frames
for more information.
The MPEG-1 format does not support named chapter markers.