#3740: drawtext drops backslashes
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Reporter: Krieger |Owner:
Type: defect | Status: new
Priority: normal |Component: avfilter
Version: git-master | Resolution:
Keywords: drawtext| Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Comment (by Cigaes):
Can you explain why you consider this a bug? You noticed that this is
related to expansion: obviously, the backslash is doing its job of
preventing the expansion of the next character.
The fact that a trailing backslash is preserved instead of either being
dropped or causing an error is an undocumented and unsupported corner case
of the expansion code.
You will notice that putting two backslashes in the {{{text}}} option
gives the correct result in both cases. Of course, to put two backslashes
in the {{{text}}} option, you need to put four backslashes in the
{{{drawtext}}} argument string, and therefore eight in the graph
description. Still no solution for the escaping madness, but it works
reliably and predictably.
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Ticket URL: https://trac.ffmpeg.org/ticket/3740#comment:2
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