TriDef Media Player - Guides

3-D File Naming Conventions

When playing 3-D media (ie, photos or videos), TriDef Media Player analyses the file's name to determine how the 3-D information has been stored within it. This naming convention involves placing the appropriate suffix to the end of the filename (but before the extension).

The following animation shows the 3-D environment used for all subsequent example images. It clearly shows the effect of the viewer's position (what the left eye sees compared to what the right eye sees).

nail

The word "image" used throughout this page refers not only to photos, but also to the individual frames of a video clip. That is, the image "nail-lr.jpg" in the first example, could instead be a single frame from the video "nail-lr.avi".

Stereo (Side-by-side)

Suffix	Filename	Description
-lr	nail-lr.jpg	"left right" Images intended for the left and right eyes (hereafter called "views") are arranged in a single image, layed out side-by-side.
-rl	nail-rl.jpg	"right left" Left and right views arranged in a single image as above, but in the reverse order (ie, the view intended for the right eye appears on the left-hand side of the image).
-lrq	nail-lrq.jpg	"left right squashed" Side-by-side as for -lr but with each view scaled to half its original width (ie, q implies 'squashed'). It can be inferred that the reverse layout -rlq is also supported.

Stereo (Above-below)

Suffix	Filename	Description
-ab	nail-ab.jpg	"above below" A single image with the left view placed above the right view.
-ba	nail-ba.jpg	"below above" A single image with the right view placed above the left view.
-abq	nail-abq.jpg	"above below squashed" Above-below as for -ab but with each view scaled to half its original height. As before, the layout -baq can also be inferred.

Stereo (Interlaced)

Suffix	Filename	Description
-oe	nail-oe.jpg	"odd even" A single image with the left and right views interlaced on alternating lines. The odd numbered lines in the image are from the left view, and the even numbered lines are from the right view. Although the image appears to be stretched, it actually contains the same number of pixels as -ab, -lr, etc. That is, the act of interlacing the views causes this apparent stretch.
-eo	nail-eo.jpg	"even odd" A single image with the left and right views interlaced on alternating lines. The even numbered lines in the image are from the left view, and the odd numbered lines are from the right view.
-oeq -3di	nail-oeq.jpg nail-3di.jpg	"odd even squashed" "3d interlaced" A single image with the left and right views sqaushed then interlaced on alternating lines. Note that although the resulting image does not look squashed, the views themselves are indeed squashed for the same reasons given for -eo. -3di (from "3D Interlaced") is a term commonly used to describe this layout, therefore -eoq and -3di can be used interchangeably. The reverse of this layout is -eoq, which can also be called -3dir.

Depth Based

Suffix	Filename	Description
-sd	nail-sd.jpg	"source depth" 2-D source image and depth-map are arranged in a single image, layed out side-by-side.
-sdrl -sdr	nail-sdrl.jpg nail-sdr.jpg	"source depth right left" "source depth reversed" As above, but with the 2-D source image on the right side of the image and the depth-map on the left. Again, it should now be possible to infer the meaning of -sdab and -sdba.
-s2d1	nail-s2d1.jpg	"source depth 2:1" Unscaled 2-D source image beside a half-width depth-map. That is, the ratio of source pixels to depth pixels is 2:1. -s120d60 is, of course, equivalent to -s2d1 and is perhaps more intuitive given that the source is 120 pixels wide, and the depth is 60 pixels wide. Ratios useful for other media form-factors include -s3d2, -s720d100, -s1080d240, etc.
-s2d1q	nail-s2d1q.jpg	"source depth 2:1 squashed" Again the image contains a 2-D source image and a depth-map in the ratio 2:1, however in this case the resultant image is squashed to match the width of the original 2-D source. That is, the total width of 120 pixels comprises 80 pixels of 2-D source, and 40 pixels of depth (equivalent to -s80d40q).

Multi-view (Tiled)

Suffix	Example	Filename	Description
-3x3		nail-3x3.jpg	"3 by 3" 9 separate views arranged in a single 3x3 grid. The top-left tile contains the left-most view, increasing across successive rows to the right-most view in the bottom-right tile.
-2x2r		nail-2x2r.jpg	"2 by 2 reversed" 4 separate views arranged into a 2x2 grid in the reverse order to -3x3. Various other arrangements and view numbers are also supported, including -2x3, -4x2r, -1x2, etc.

Separate Files

Please Note: This section currently applies to image files only. These suffixes can not be used for video files.

Suffix	Example	Filename	Description
-v1, -v2, ... -vN	...	nail-v1.jpg nail-v2.jpg ... nail-v9.jpg	"separate views" n separate views, each in its own file. The first file contains the left most view, and the last file contains the right most view.
-s, -d		nail-s.jpg nail-d.jpg	"separate source and depth" Separate source and depth image files.
-l, -r		nail-l.jpg nail-r.jpg	"separate left and right" Separate left and right image files.

3-D Anaglyph

Suffix	Example	Filename	Description
-anaglyph -ana		nail-anaglyph.jpg nail-ana.jpg	"anaglyph" A pre-rendered 3-D red/cyan anaglyph image.

Forced 2-D

Suffix	Example	Filename	Description
-2d		nail-2d.jpg	"forced 2d" A 2-D image which must always be displayed in 2-D. Without this suffix, a 2-D image would undergo 2-D to 3-D conversion and be displayed in 3-D.