Apple compressor 3 Manuale

 

The retiming controls in the Frame Controls pane have been expanded, making it 
possible to configure the output video duration. This feature makes it possible to create 
high-quality slow motion effects. You can choose to use one of three methods to set 
the duration:

 Percent of source:  Use this to enter a percentage value to modify the clip’s speed or 

choose a specific situation, such as 24 @ 25, from the pop-up menu.

 Total duration:  Use this to choose a duration for the clip. This option is most useful 

when you have a source media file whose duration is a bit longer or shorter than it 
needs to be, and you’d rather change its playback speed than add or remove 
video frames.

 So source frames play at [frame rate] fps:  Use this when the source media file’s 

frame rate does not match the Encoder pane frame rate (shown as the frame rate 
for this item). 

In all cases, if the source media file contains audio, the audio also has its speed changed, 
with the audio pitch corrected so that it sounds the same as the original, just at a 
different speed. This ensures that you will maintain sync between the video and audio.

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