Google Flix Engine Linux Reference Manual - Manual (Page 140)

134 Flix Engine Linux Module Documentation
5.32 PNG Image Export (Thumbnail)
5.32.1 Detailed Description
The PNG image export filter creates PNG images from the source video data of the input file passed to
Flix2_SetInputFile() .
Filter Parameters:
Name | Type | Opt/Reqd | Range
=======================================================================================
FE2_PNGEX_OUTPUT_DIRECTORY | String | Optional | N/A
FE2_PNGEX_FILENAME_PREFIX | String | Optional | N/A
FE2_PNGEX_FILENAME_SUFFIX | String | Optional | N/A
FE2_PNGEX_ENABLE_ALPHA | Boolean | Optional | [0,1]
FE2_PNGEX_EXPORT_INTERVAL | Numeric | Optional | [1,video stream duration]
FE2_PNGEX_EXPORT_TIME_STRING | String | Optional | N/A
FE2_PNGEX_EXPORT_CUE_POINTS | Numeric | Optional | [0,3]
FE2_PNGEX_AUTO_EXPORT_COUNT | Numeric | Optional | [0,10000]
FE2_PNGEX_AUTO_EXPORT_START_TIME | Numeric | Optional | [0,video stream duration]
FE2_PNGEX_AUTO_EXPORT_END_TIME | Numeric | Optional | [0,video stream duration]
FE2_PNGEX_AUTO_EXPORT_RANDOM_PERIOD | Numeric | Optional | [1,)
FE2_PNGEX_EXPORT_FIRST_FRAME_PNG | Boolean | Optional | [0,1]
FE2_PNGEX_COMPRESSION_LEVEL | Numeric | Optional | [-1,9]
FE2_PNGEX_WIDTH | Numeric | Optional | FE2_SCALE_WIDTH
FE2_PNGEX_HEIGHT | Numeric | Optional | FE2_SCALE_HEIGHT
Example Usage:
sc = Flix2_AddFilter(&filter, flix, FE2_FILTER_PNGEX);
// Automatically export 10 PNG images spaced evenly through the clip
if(sc == ON2_OK)
sc = Flix2_FilterSetParam(filter, FE2_PNGEX_AUTO_EXPORT_COUNT, 10);
Notes:
• All PNG exporter parameters are optional, but at least one of the following parameters must be used
in order to export images:
– FE2_PNGEX_AUTO_EXPORT_COUNT
– FE2_PNGEX_EXPORT_CUE_POINTS
– FE2_PNGEX_EXPORT_FIRST_FRAME_PNG
– FE2_PNGEX_EXPORT_INTERVAL
– FE2_PNGEX_EXPORT_TIME_STRING
• Image file naming:
– The general form of an output image name is:
FE2_PNGEX_OUTPUT_DIRECTORY ’/’ FE2_PNGEX_FILENAME_PREFIX nnnn FE2_-
PNGEX_FILENAME_SUFFIX ’.png ’
using values supplied or defaults as described by each parameter.
– Image file numbering starts at 0, the numeric portion of the file name will be expanded to 4
columns (e.g., 0 will be 0000). This limits the export total to 10000 images. If 10000 images
per encoded file is inadequate, please contact
support .
• Duplicate PNG images:
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