Sneak Preview: More Efficient Image Sequence Handling by Isak June 17, 2016 Howto
Another sneak preview before the release of Vidispine 4.6. It might be the last before release, but keep your eyes open for another one to be sure. Vidispine 4.6 contains an important database schema change when it comes to handling image sequences. The result is much better efficiency and smaller database.
OK, we admit it. The old way of handling image sequences files was really inefficient. For an hour of 25 fps content, that is 90k rows for the files in the database, 90k components, 90k times X number of component metadata. You see where this is heading?
With 4.6, a file sequence is an entity on its own. So, a file sequence is a file, it's just represented as multiple physical files on the file system. See what we mean? No? An example.
In order for file sequences to be recognized on a Storage, add a
element to the storage definition. Like this:
XHTML
... .*-(\d) .png
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...
.*-(\d) .png
Now copy three files to it, foo-00001.png, foo-00002.png, foo-00003.png.
XHTML
VX-1702 foo-0000/.png file:/srv/media/foo-0000*.png#file=1-3 CLOSED -1 2016-06-16T15:15:36.303 02:00 1 VX-1 FILE_SEQUENCE
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VX-1702
foo-0000/.png
file:/srv/media/foo-0000*.png#file=1-3
CLOSED
-1
2016-06-16T15:15:36.303 02:00
1
VX-1
FILE_SEQUENCE
Whoa! One FileDocument with lots of new stuff to it. As you can imagine, if you want to import this sequence, all you need to do is
POST /API/storage/file/VX-1702/import
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POST /API/storage/file/VX-1702/import
Much easier. And of course, when you show the item
XHTML
VX-726 0 original image/png VX-1702 foo-0000/.png file:/srv/media/foo-0000*.png#file=1-3 CLOSED -1 2016-06-16T15:15:36.303 02:00 1 VX-1 FILE_SEQUENCE ...
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VX-726
0
original
image/png
VX-1702
foo-0000/.png
file:/srv/media/foo-0000*.png#file=1-3
CLOSED
-1
2016-06-16T15:15:36.303 02:00
1
VX-1
FILE_SEQUENCE
...
File sequences work for API import, auto-import, copy jobs. Not yet for raw import.
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