Grass Valley Switcher Products - Manual (Page 142)

142 Switcher Products — Protocols Manual
Section 6 — Still Store Image File Format
Pad parameters pad1 and pad2 are fillers generated by the compiler to
align the next parameter to a 16 or 32 bit boundary. These pads must be
included in the file but their value is unimportant.
Metadata files are written as 512 bytes regardless of the size of the active
information. Pad3 fills out the message to 512 bytes. Values are not impor-
tant but dummy values must be included in the file.
Line Rate
For offset 0xac: imageLineRate, the 2
6
bit, bit 6, is the “progressive scan” bit.
For rates other than 525 and 625, the upper eight bits of the 16-bit image-
LineRate field can optionally be used to express the original frame rate. The
0xB4 Int32 fenceSize
0 for full screen
1 for 1/2 x 1/2
2 for 1/3 x 1/3
3 for 1/5 x 1/5
Fill image data file with appropriate information. See discussion above in Image
Data File Format section.
0xB8 float outputCropRight
Controls cropping of image when loaded to the output of the from still store. See
discussion below in Crops and Position section.
0xBC float outputCropLeft
0xC0 float outputCropTop
0xC4 float outputCropBottom
0xC8 float outputVertPos
Controls position of image when loaded to the output of the stillstore. See discus-
sion below in Crop and Position section.
0xCC float outputHorizPos
0xD0 Int32 outputFreezeMode
Controls how frozen image is displayed by the still store.
0 to display complete frame
1 to display field 1 with interpolated field 1 for field 2
2 to display field 2 with interpolated field 2 for field 1
3 to display field 1 in both fields (replicate)
4 to display field 2 in both fields (replicate)
0xD4 Int8 shapedVideo
0 for unshaped or video only
1 for shaped video
See discussion above in Shaped Video section.
0xD5 Int8 pad2 0 (compiler generated structure alignment filler)
0xD6 Int16 clipLength
Number of frames stored in data file.
Stills have a length of 1
0xD8 Int16 markInFrame Playback starting frame number (0 is first frame in file)
0xDA Int16 markOutFrame Playback ending frame (number of the frame AFTER last one to be played)
0xDC Int16 vidKeyOffset Temporal offset for key in frames (not used). Fill with 0s.
0xDE Int16 loopFromFrame Number of last frame in a looped region.
0xE0 Int16 loopToFrame Number of first frame included in looped region.
0xE2 Int16 loopCount
Number of times looped region is repeated.
0 - no repeat (play looped region once)
1 - 32767 repeat loop region this number of times
-1 loop forever
A value of 1 says repeat the looped region once, i.e., play it twice.
0xE4 Int32 dwLowDateTime Date and time of image modification in Win32 (MFC) format (not used). Insert
Win32 formatted date and time or fill with 0s.
0xE8 Int32 dwHighDateTime
0xEC 276 characters pad3[276] 0s (for consistent 512 byte file size regardless of version)
Table 125. Image Metadata - (continued)
Offset Size Parameter Value /Comment