[FFmpeg-devel] [PATCH 2/3] closed caption decoder: add new parameter to allow output to avoid repeated lines

[Roger Pack]

I didn't actually *need* this but thought the functionality was very
nice to have, so here's my contribution.

It allows for forcing "rollup" style closed captions to output one
line at a time (basically, when there is a carriage return, it outputs
a line), so there is never any duplication in the output, for instance
if it's converted to .srt or .vtt files.  Without this you have output
like this:


00:01.536 --> 00:03.605
AND AS A SECONDARY QUESTION, I

00:03.605 --> 00:05.707
AND AS A SECONDARY QUESTION, I
WOULD ASK YOU HOW OUR VETERANS

00:05.706 --> 00:09.343
WOULD ASK YOU HOW OUR VETERANS
AND ACTIVE DUTY MILITARY HAVE

00:09.344 --> 00:10.412
AND ACTIVE DUTY MILITARY HAVE
FARED UNDER THIS COMMANDER IN

With it set to "1" you get output like this:


00:02.014 --> 00:03.049
SOLDIERS HOME IN HOLYOKE,

00:03.048 --> 00:04.116
MASSACHUSETTS, HAVE LOST 73.

00:04.116 --> 00:04.850
ANOTHER FACILITY IN NEW ORLEANS,

00:04.850 --> 00:06.184
53.

00:06.184 --> 00:07.753
VETERANS ARE IN REAL PERIL

00:07.753 --> 00:14.193
BECAUSE OF A LACK OF PREPARATION

00:14.193 --> 00:15.727
AND THEN THE SAME DYSFUNCTION

...

Thanks.
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