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Subtitler Filter Freezes Virtualdub, Program freezes with specific .ssa file
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uzi1
Posted: May 6 2008, 03:07 PM


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Posts: 1
Member No.: 23526
Joined: 6-May 08



Symptoms:
while processing a file using subtitle filter, the program freezes on specific frame, causing CPU Usage to 100% and the process can't be aborted.

Resolution:
Killing virtualdub process from ProcessExplorer or something.

Description and measures taken:
1. Tryed to encode the file without any filter (as everyone should do), and the mention problem does not appear
Result: file is encoded correctly

2. Tryed to inspect the log file
Result: file reports begining of the dub process - this is the last line

3. Tryed to load a different .ssa file (rather those causing the problem)
Result: file encoded correctly

4. Tryed to determine the location, phrase and options set in the .ssa file causing the problem
Result: this reveals some more questions...

After some black-box search for the problem I have understand that a specific sequence of characters causes the program to freeze. After altering the lines containing the character sequence, the problem disappear.
Look at the picture:
user posted image
red-framed line causes the freeze.
Character set is ANSI (Windows-1251, I beleive)
Language is Bulgarian, Cyrilic one
Character sequence causing the problem is: ".\NŠī"
Spelling: (full stop); (reversed solidus); (Latin Big letter N); (Cyrilic Big Letter ER); (Cyrilic Small Letter O)
This is a link to a .ssa file which causes the problem at the time 2.85 seconds from the begining.
Versions used: 1.6.7; 1.7.8; 1.8.0; 1.8.1 (test7)
 
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