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> Importing and Syncing BWF Files |
Importing and Syncing BWF Files
You can import BWF files into an Avid editing application approximately 10 to 12 times faster than capturing in real time. The files maintain pure digital quality for all audio post processing. For basic information on importing audio files, see
Main Topics: Importing Files.
During import of NTSC BWF files, if no frame rate is specified in the file, a dialog box appears and asks if the conversion should use 29.97 fps or 30áfps, and drop-frame or non-drop-frame. Your choices depend on how the audio was recorded.
After you capture video, use the AutoSync feature to sync picture and sound or multiple tracks of sound. If you are using BWF files from a 24-fps shoot in a PAL project, you must use the PAL Method 2 approach, in which picture and sound are captured separately.
If you are working in a PAL 24p project, you need to take an extra step to make sure the picture and sound are correctly synced.
To import and sync BWF files:
| 1. | |
Create a project, based on the source footage.
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| 2. | |
Import the log file, and capture the video footage.
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Import the BWF file into the same bin in which you captured the video
footage.
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For 24p PAL projects, you need to create a new bin column:
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| a. | |
Highlight the Start timecode column.
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| b. | |
Select Edit > Duplicate.
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From the list of columns, select Aux TC 24 and click OK.
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| d. | |
In the dialog box, click Convert.
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Display the Auxiliary TC1 column.
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Highlight the Aux TC 24 column, and copy it to the Auxiliary TC1
column.
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Use Auxiliary TC 1 only as a sync point reference for AutoSync. Do
not use it for data tracking or EDL generation.
Use the Aux TC24 column to generate a 24-frame EDL for audio only.
Use the Film TC column to generate a 24-frame EDL for video only.
This timecode field represents the video timecode of a HD
downconvert to standard definition video.
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Make sure all entries in the Shoot Date column use the same syntax.
Currently, some BWF files use the format 2003/10/03 as the Shoot
Date while some ALE files use 2003-10-03. This field is used as part
of the AutoSync process to guarantee the uniqueness of the timecode.
To fix this problem, do one of the following:
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Manually change the format of one set of clips to match the other.
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If you need the information, create a custom column with a
different name, select Edit > Duplicate to copy the information
into the custom column, and delete the Shoot Date column.
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| 6. | |
Highlight the picture and audio clips and select Bin > AutoSync.
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| 7. | |
For 24p PAL projects, use Auxiliary TC1 as a sync point. For other
projects, use the Start timecode.
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The editing application creates new subclips with synced picture and
sound; these subclips are ready for editing.
