Product specifications

How the Media Indexer Works with AMA Material
26
Checking AMA Media Into Interplay - Comparing OP-ATOM and OP-1A
Avid AAF (OP-ATOM) Format
The example in the previous illustration uses a clip with one video channel and two audio
channels. The top portion of the Avid AAF section is a representation of what you can see in an
Avid editing system bin for digitized MXF material. The metadata contains the following:
•A clip ID
• Three file IDS, one for each video and audio track.
• A source ID (for example, a reference to the source file or source tape)
The three file IDs relate directly to the associated .mxf files on shared storage. The .mxf files
contain the related media and each contains a File ID that identifies the file as video or audio. In
the “Media Indexer data section” of the illustration, the Media Indexer lists the three files starting
with ID-1, ID-2, and ID-3.
AMA AAF (OP-1A) Format
The format for the OP-1A material above the dashed line in the illustration is obviously different.
Instead of separate file IDs for video and audio, the information is stored as separate descriptors
within one file ID. And the media is store separately without the metadata elements associated
with OP-ATOM material.
AMA Checkin to Interplay
The area below the dashed line in the illustration shows the new files created when you check
AMA material into Interplay v3.0. The Interplay client library (also known as the JXDK) creates
a new file for each channel or track of the AMA material. These new files have a .spaaf extension
(sparse AAF) and are in a format that the Media Indexer can index. Each file contains a file ID
for the associated audio or video channel as well as a pointer to the related portion of the media.
The “Media Indexer data” portion of the illustration shows these files as ID-4, ID-5, and ID-6.
Each entry in the Media Indexer database references the .spaaf file and the AMA Media file.
For Interplay v3.0, the .spaaf files must be located under one high level folder. As you check the
AMA files into Interplay, the system maintains a hierarchy of folders within that folder. You
store the AMA media files in a separate location such as an ISIS 2000 parking storage. The
Media Indexer needs to be aware of the location of both sets of files. It does not index the AMA
media files but it does index the .spaaf files. This allows you to use dynamic relink to an AMA
resolution. See “AMA on Interplay Workflow” on page 19.