Apple Compressor 2 - Manual (Page 119)

Chapter 9 Creating MPEG-1 Output Files 119
 Bit rate: Use this slider to choose the bit rate to use for the output video, or enter a
number directly into the text field. While the available range is from 0.5 Mbps to
2.0 Mbps, the actual setting you should use depends on how the output is to be
used. Higher bit rates produce better picture quality, but they also produce larger
output files.
 For web projects, choose a bit rate that best balances the picture quality with file
size and download expectations.
 For VCD projects, the recommended video bit rate is 1.15 Mbps, with a system stream
(multiplexed video and audio in the same file) bit rate of under 1.3944 Mbps.
 For DVD projects, the typical video bit rate is 1.15 Mbps with 1.856 Mbps being the
maximum allowed.
Audio Tab
You use the Audio tab to make settings related to the audio format.
 Enabled checkbox: Make sure this box is selected if you want the MPEG-1 output
format to include the Audio tab settings.
 “Sample rate” pop-up menu: Choose the sample rate of the output audio.
 48 kHz: Required for use on DVDs.
 44.1 kHz: Used on audio CDs. This is the most commonly supported sample rate.
 Channels buttons: Choose whether to create a stereo or mono output audio.
 “Bit rate” pop-up menu: Choose the bit rate to use for the output audio. Choices are
64 Kbps, 128 Kbps, 192 Kbps, 224 Kbps, and 384 Kbps. While higher bit rates produce
higher quality audio, they also produce larger output files.
Note: The 224 Kbps and 384 Kbps settings are not available when Channels is
set to Mono.