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Abhinav Shukla 2016-08-10 03:39:01 -07:00
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26
docs/HARDSUBX.txt Normal file
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Overview
========
Dependencies
============
Tesseract (OCR library by Google)
Leptonica (C Image processing library)
FFMpeg (Video Processing Library)
Compilation
===========
Linux
-----
Make sure Tesseract, Leptonica and FFMPeg are installed, and that their libraries can be found using pkg-config.
Refer to OCR.txt for installation details.
Run:-
make ENABLE_HARDSUBX=yes
Windows
-------
Coming Soon

35
src/lib_ccx/params.c
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@ -730,6 +730,41 @@ void usage (void)
mprint(" /tmp/output_2.d/sub0000.png\n");
mprint(" /tmp/output_2.d/sub0001.png\n");
mprint(" ...\n");
mprint("Burned-in subtitle extraction:\n");
mprint(" -hardsubx : Enable the burned-in subtitle extraction subsystem.\n");
mprint("\n");
mprint(" NOTE: The following options will work only if -hardsubx is specified before them:-\n");
mprint("\n");
mprint(" -ocr_mode : Set the OCR mode to either frame-wise, word-wise or letter wise.\n");
mprint(" e.g. -ocr_mode frame (default), -ocr_mode word, -ocr_mode letter\n");
mprint("\n");
mprint(" -subcolor : Specify the color of the subtitles\n");
mprint(" Possible values are in the set {white,yellow,green,cyan,blue,magenta,red}.\n");
mprint(" Alternatively, a custom hue value between 1 and 360 may also be specified.\n");
mprint(" e.g. -subcolor white or -subcolor 270 (for violet).\n");
mprint(" Refer to an HSV color chart for values.\n");
mprint("\n");
mprint(" -min_sub_duration : Specify the minimum duration that a subtitle line must exist on the screen.\n");
mprint(" The value is specified in seconds.\n");
mprint(" A lower value gives better results, but takes more processing time.\n");
mprint(" The recommended value is 0.5 (default).\n");
mprint(" e.g. -min_sub_duration 1.0 (for a duration of 1 second)\n");
mprint("\n");
mprint(" -detect_italics : Specify whether italics are to be detected from the OCR text.\n");
mprint("\n");
mprint(" -conf_thresh : Specify the classifier confidence threshold between 1 and 100.\n");
mprint(" Try and use a threshold which works for you if you get a lot of garbage text.\n");
mprint(" e.g. -conf_thresh 50\n");
mprint("\n");
mprint(" -whiteness_thresh : For white subtitles only, specify the luminance threshold between 1 and 100\n");
mprint(" This threshold is content dependent, and adjusting values may give you better results\n");
mprint(" Recommended values are in the range 80 to 100.\n");
mprint(" The default value is 95\n");
mprint("\n");
mprint("An example command is as follows:-\n");
mprint("ccextractor video.mp4 -hardsubx -subcolor white -detect_italics -whiteness_thresh 90 -conf_thresh 60\n");
mprint("\n");
}
unsigned char sha256_buf[16384];