4:2:2 Filter

The 4:2:2 filter converts any format image file to a 4:2:2 format image file, or vice-versa.

Both NTSC and PAL video standards are supported. The valid resolutions are as follows: NTSC (720 x 486), PAL (720 x 576).

The preset NTSC resolution, which is 645 x 486 on the Iris 4D series, is designed to fill the maximum displayable image area when the Iris frame buffer is in secondary display mode. This is only important when the image is going to be recorded to video via the Iris frame buffer.

The 4:2:2 standard however, is not tied to any particular frame buffer. The horizontal resolution (for both NTSC and PAL video) is 720 pixels across.

The active vertical resolution for NTSC video is 486 lines, and for PAL, it is 576 lines. All other resolutions are considered invalid. Specific NTSC or PAL image attributes are determined from file characteristics.

To use the 4:2:2 filter:

1

Select Render > Filter > 4:2:2. The File Requestor appears and prompts you to enter the source file name.

2

Type the name of the source file in the File Requestor, or click Show List and select the source file using the File Lister, and then click Input 4:2:2. The source file must be 720 pixels wide.

The File Requestor appears again and prompts you to enter the destination file name.

3

Type the name of the destination file in the File Requestor, or click Show List and select the destination file using the File Lister, and then click Output 4:2:2.

The source file is converted either to or from the 4:2:2 format.

To open the 4:2:2 Options window:

• Select Render > Filter > 4:2:2 .

4:2:2 Options

Mode

The direction of the conversion. The default setting is Image to 4.2.2.

Image to 4.2.2	converts any format image file to a 4:2:2 format file
4.2.2 to Image	converts a 4:2:2 format file to any format image file

Input Images

Determines whether a single frame is converted (Single Frame), or an entire animation is converted (Sequence). If Input Images is Sequence, then the From, To, and By parameters become available. The default setting is Single Frame.

From, To, By

The first frame (From), last frame (To), and frame increment (By) of the animation to be converted. The frame number is appended to each file name. These parameters are only available if Input Images is Sequence. For example, if the From value is 1, the To value is 20, the By value is 1, and the output file name is pixfile, then the actual output file names will be pixfile.1, pixfile.2, ..., pixfile.20. The slider range is 1 to 100. The default value is 1.