[FFmpeg-trac] #10583(avformat:new): lavf fails to probe ass file with utf16le encoding

[FFmpeg]

#10583: lavf fails to probe ass file with utf16le encoding
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             Reporter:  llyyr       |                    Owner:  (none)
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  avformat
              Version:  git-master  |               Resolution:
             Keywords:  ass         |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
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Comment (by mkver):

 Your file contains two UTF-16 LE BOMs at the beginning; the subtitles.c
 code strips the first one away and when streamcopying said file, the
 resulting file gets an UTF-8 BOM from the second input BOM (otherwise
 there would be no BOM as usual). The only bug I encountered is in
 ff_text_peek_r8(): It's undoing of the read is incorrect in case there the
 text reader's buffer still contains other characters (which are currently
 implicitly discarded). But this is irrelevant for all current users of
 ff_text_peek_r8().
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Ticket URL: <https://trac.ffmpeg.org/ticket/10583#comment:1>
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