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J7N 29th July 2008 04:51 AM

Empty lines in subtitle output
I am creating MKV files with OCR'd subtitles. Now after I mux them using mkvmerge, there are sometimes empty lines visible in BSPlayer. I cannot find anything in common among various occurences of this issue.

Here's how it looks:

* Normal subtitles, line 1.
* Normal subtitles, line 2.


* * Some subs shifted up
* * * * * * *by one line.


What could be the cause of this?

adicoto 29th July 2008 06:35 AM

This I recall occured in some older builds when the start-time of the second subtitle was less than the end-time of the first subtitle:



In this case, BSPlayer automatically displayed the second subtitle one row up. But...this was long time ago.

The muxed subtitle was srt format ? If so, are you sure there isn't an unwanted CR on that point.

J7N 29th July 2008 10:04 AM

I'll see if the times really overlap in all cases. Maybe this is it.

Yes, the source is SRT. I thought about an orphaned CR or LF being there, like when you press Shift-Enter in certain programs, and forced full CR-LF (DOS mode) in my editor. This did not solve the problem.

J7N 3rd August 2008 03:41 AM

No this was not it. I checked and there was no time overlap.

Since the problem occurs much more often when special Unicode characters are in use, I suppose it's yet another width-related issue.

One more thing I must use ffdshow for. :lol:

adicoto 3rd August 2008 06:35 AM

Can you post a link or send me such a file ?

J7N 3rd August 2008 09:46 AM

I can, but there is really nothing to see. The entire text is in Russian (= special characters), re-timed by me. This SRT has been demuxed from the Matroska file.


Tizio 3rd August 2008 12:16 PM

I've tried your subtitle file and I can read all the lines (at least until the 45th subtitle segment) without problems (exception made for some lines in which the first/last character is lost due to the known char-cut bug) :roll:

adicoto 3rd August 2008 01:59 PM

Yeap, the problem is there.

Line 8 and line 11 from the beginnig are the closest. But no problems with cutt-off letters. I will look more into it.

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