Avid Technology Car Video System PT User Manual

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Media Station|PT Guide
8
OMF
OMF is both a media file and sequence format. 
OMF media files can be audio or video.
Media Station|PT Support for OMF Media and 
Sequences
Media Station|PT supports OMF media and se-
quences as follows:
• Import and export of OMF sequences with 
embedded OMF video files and WAV or AIFF 
audio files
• Import and export of OMF sequences that re-
fer to external (linked) OMF video files and 
WAV or AIFF audio files
Pro Tools Support for OMF Media and 
Sequences
With DigiTranslator 2.0, Pro Tools supports 
OMF media and sequences as follows:
• Import of OMF video files created by 
Media Station|PT or other Avid applications
• Export of OMF audio files
• Import and playback of OMF sequences that 
refer to external (linked) audio files or contain 
embedded audio files
• Import and playback of OMF sequences that 
refer to external (linked) OMF video files
• Export of OMF sequences that refer to exter-
nal (linked) audio files or contain embedded 
audio files
• Video satellite systems only: Import of OMF 
sequences containing embedded video to a 
satellite track, in which case Pro Tools imports 
only the metadata (cuts and clip names) and 
not the video
• Pro Tools does not export video files, tracks or 
metadata as part of OMF sequences.
Embedded Media
Exporting to OMF or AAF with embedded media 
results in one large OMF or AAF file containing 
both the metadata and all associated media files. 
However, it is important to note that file size is 
limited to 2 GB.
Media Data (Media Files)
Media data represents raw audio or video mate-
rial and is stored in individual media files. Every 
time you record a piece of video or audio mate-
rial into an application, you are creating a media 
file containing media data. Audio media data is 
stored as samples (such as 44,100 or 48,000 sam-
ples per second of recording) while video media 
is typically stored as frames (24, 25, or 30 frames 
per second of recording).
The size of each media file depends on how 
much audio or video material it contains. For 
example, if you record ten minutes of continu-
ous video material at a high resolution, you 
might end up with a video media file that is 
1.8 GB in size, whereas a one minute recording 
at the same resolution might result in a 180 MB 
file. Media files tend to be large, since high qual-
ity audio and video signals are data intensive. 
Video data generally requires considerably more 
storage than audio data.