Avid Technology Car Video System PT 用户手册

9  

Click the Overwrite or Splice-In button. The 

selected portion of old sequence is edited into 
the empty sequence in the Record Monitor.

10  

Follow the preceding steps for exporting the 

new sequence (see “Exporting a Sequence” on 
page 61).

Transcoding HD Sequences

You can use Media Station|PT to transcode a 
1080 HD sequence to SD video for either of the 
following purposes:

Playback of HD Video in Pro Tools 

Pro Tools with 

an Avid video peripheral can import and display 
editing metadata in HD Avid video, but cannot 
play back or display HD video frames. For this 
reason, sequences exported from 
Media Station|PT HD projects should also in-
clude a video mixdown in an SD resolution cor-
responding to the original HD resolution if you 
need to view the video in Pro Tools. Changing 
the resolution of the video mixdown involves 
changing the project’s Format type.

Playback of SD Video from HD Sequences 

Media Station|PT with an Avid video peripheral 
can play back SD video to an external NTSC or 
PAL monitor, but cannot play back HD video to 
an NTSC or PAL monitor. However, if you first 
transcode an HD sequence to SD video, you can 
output the transcoded video to an external 
video monitor with frame edge-aligned accu-
racy. 

Transcoding an HD sequence to SD video is a 
slower process than down-converting an HD 
project in real-time, but yields better video qual-
ity. 

To transcode HD resolution video to SD resolution 
video:

1  

Open the Project in Media Station|PT.

2  

In the Project window, click the Format tab.

3  

Choose a corresponding SD resolution from 

the Project Type pop-up menu. For example, in 
an NTSC 1080i/59.94 project, switch to a 30i 
format and in a PAL 1080i/50 project, switch to 
a 25 format.

4  

Open the bin containing the sequence you 

want to transcode, and select the sequence.

Overwrite

Splice-In