User Manual

Chapter 5 Custom settings and output formats 119
Stage 3: Open the Streaming tab and edit streaming settings
You use the Streaming tab to set hints for your output le, as well as set the maximum packet
size and packet duration limits of the MPEG-4 Part 2 output le. You can also set your output
media le to work with an older version of QuickTime Streaming Server (version 4.1 or earlier).
1 To open the Streaming tab, click the Streaming button in the MPEG-4 Encoder pane of the Inspector.
2 Adjust the following MPEG-4 streaming settings:
•
Streaming hints enabled: Make sure that this checkbox is selected if you want the MPEG-4 Part
2 output format streaming settings to be applied.
•
QuickTime Streaming Server Compatibility (pre 4.1): Select this checkbox if you want your output
media le to work with an older version of QuickTime Streaming Server (version 4.1 or earlier).
You don’t need to select this checkbox if you’re using a version of QuickTime later than 4.1,
because any streaming compatibility issues are automatically resolved.
•
Packet Maximum Size: Enter a number to specify the largest allowable le size (in bytes) for a
streaming packet in your output media le. The packet size you set should be no larger than
the largest packet used on any network between the streaming server and the viewer.
•
Packet Maximum Duration: Enter a number to specify the longest allowable duration (in
milliseconds) for a streaming packet in your output media le. The duration aects MPEG-4
Part 2 audio only. It limits the maximum amount of audio (in milliseconds) in any packet,
which limits the audio dropout created by the loss of a packet.
Although the output format setting is the most important component of the Compressor
workow, you can also add other settings and presets, such as lters, cropping, frame sizing,
actions, and destinations.
Create settings for an audio podcast
Compressor makes it easy to create an enhanced audio podcast based on the MPEG-4 output
format. An enhanced audio podcast includes podcasting information such as chapter and
podcast markers with artwork and URLs, as well as a variety of text annotations. Follow the
instructions below to create a setting for an audio podcast.
Stage 1: Open the MPEG-4 Encoder pane and congure it for audio-only output media les
1 In the Inspector window, click the Encoder button and choose MPEG-4 from the File Format
pop-up menu.
2 To open the Video tab, click the Video button.
3 Deselect the Video Enabled checkbox.