Google Flix Engine Linux Reference Manual - Manual (Page 141)

5.32 PNG Image Export (Thumbnail) 135
– If any of FE2_PNGEX_AUTO_EXPORT_COUNT , FE2_PNGEX_EXPORT_CUE_POINTS
or FE2_PNGEX_EXPORT_TIME_STRING are enabled and a time is duplicated, the duplicate
time will be discarded.
– If FE2_PNGEX_EXPORT_INTERVAL is enabled and at least one of FE2_PNGEX_AUTO_-
EXPORT_COUNT , FE2_PNGEX_EXPORT_CUE_POINTS or FE2_PNGEX_EXPORT_-
TIME_STRING is enabled, the time interval based PNG image will be generated using the
frame subsequent to the frame that would otherwise have been duplicated if times overlap.
• Incorrect duration:
– If the duration is unavailable (i.e., Flix2_GetSourceDuration() returns -1) the first FE2_-
PNGEX_AUTO_EXPORT_COUNT frames will be output.
– If the duration is misreported (i.e., >actual) and not all requested PNGs have been output, one
additional PNG will be generated on the last frame.
Additional References:
For information about the PNG file format, please visit: www.libpng.org
Defines
• #define FE2_FILTER_PNGEX
Filter name for use with Flix2_AddFilter() .
• #define FE2_PNGEX_OUTPUT_DIRECTORY
Filter parameter for setting PNG image output directory.
• #define FE2_PNGEX_FILENAME_PREFIX
Filter parameter for setting PNG image file name prefix.
• #define FE2_PNGEX_FILENAME_SUFFIX
Filter parameter for setting PNG image file name suffix.
• #define FE2_PNGEX_ENABLE_ALPHA
Filter parameter for preserving source video alpha channel data in exported PNG images.
• #define FE2_PNGEX_EXPORT_INTERVAL
Filter parameter for enabling PNG image export at a millisecond interval.
• #define FE2_PNGEX_EXPORT_TIME_STRING
Filter parameter for setting a string of PNG export times in milliseconds.
• #define FE2_PNGEX_EXPORT_CUE_POINTS
Filter parameter for enabling export of PNG images at cue points.
• #define FE2_PNGEX_AUTO_EXPORT_COUNT
Filter parameter for enabling automatic PNG image generation.
• #define FE2_PNGEX_AUTO_EXPORT_START_TIME
Filter parameter for setting PNG auto generation start time.
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